Adolescents’ attitudes, habits, identity and social support in relation to physical activity after the COVID-19 pandemic

This study focuses on adolescents’ cognitive processes, behaviors and social support (SS) as they relate to physical activity (PA) before and after the pandemic. The aims of the study were: (1) to investigate the changes in adolescents’ engagement in moderate and vigorous physical activity (MVPA), and examine the changes in PA-related attitudes and behaviors before and after the COVID-19 pandemic; (2) to analyze the correlations between the significant changes that were found, PA engagement, and SS. The survey targeted third-year middle school students of Italian nationality, attending male and female mixed classes, residents in urban, periphery and sub-urban areas, living in families with different incomes, and different habits of engaging in PA. A longitudinal study was developed using a standardized questionnaire. The questionnaire was administered in April–May 2023 to a sample of 952 students aged 11/14 residing in the Marche region in Central Italy. Increasing values were found in the post-COVID-19 phase for all the cognitive processes and attitudes, in particular, those regarding habits (0.66 vs 0.50, + 32%) and identity (0.70 vs 0.55, + 27%) related to PA. Significant correlations were found between these values and VPA engagement and between the values of the same indicators and SS (p < 0.01). The strongest relationship was found with the dimension of identity (r = 0.51; r = 054).

• To build an integrated tool capable of assessing: • The involvement of adolescents currently engaged in MVPA; • The attitudes, perceived capacities and opportunities, intentions, behaviors, habits and identity (M-PAC dimensions) of adolescents in relation to PA in both the current post-pandemic and pre-pandemic phases; • The SS perceived by adolescents in both the current post-pandemic and pre-pandemic phases.
• Compare the recorded changes of the M-PAC framework and SS dimensions in the pre-pandemic and post- pandemic phases.• Determine the relationships between: • The amount of PA (dependent variable) and the sociographic characteristics of the adolescents; • The summary indicators of the M-PAC framework evaluated in the current post-pandemic phase (dependent variable), the amount of PA, and the sociographic characteristics; • The summary indicators of SS in the current post-pandemic period (dependent variable), the amount of PA, and the sociographic characteristics of the participants; • The summary indicators of SS in the current post-pandemic phase and the summary indicators of the M-PAC framework.

Methods
In Italy, the law gives the role of protecting those who are the subjects of clinical trials to the Ethics Committees, and assigns to the Ethics Committees the task of reviewing and approving bio-medical and pharmaceutical research protocols.Law n.3, 11 January 2018 and Legislative Decree 52/2019.This study doesn't involve any intervention or manipulation on human subjects.Approval from ethics committees is not required for this type of study except the authorization to use the data.
In Italy, the protection of individuals with respect to data processing and their communication is regulated by Law 31 December 1996, n. 675 "Protection of persons and other subjects with respect to the processing of personal data".In this study, all the information and data collection were managed directly by the schools participating in the survey.The research was carried out in accordance with the relevant guidelines and regulations.Informed consent was requested and obtained from all the subjects and/or their legal guardians.The researchers received complete availability of the data for scientific and publication purposes as established in the relevant patnership contract.

Description of the research instrument
To collect the data necessary to achieve the objective of the research an integrated instrument was built collecting specific tools from the literature.
The second tool, the M-PAC questionnaire (The Multi-Process Action Control Approach), derives from the M-PAC approach adapted for a population of adolescents and related survey tool [39][40][41] .The questionnaire was translated into Italian for the study of individual PA and consists of different scales for assessing attitude, perceived capabilities and opportunities, intention, behavioral regulation, habit and identity of adolescents with respect to PA.This tool helps bridge the intention-behavior gap to examine the changes in adolescent PA as a consequence of the COVID-19 pandemic.The M-PAC framework has been employed both to explain and predict PA and to promote it 15,36,42,43 .
According to the M-PAC framework, PA is influenced by three fundamental processes: "reflective processes" which are the deliberate expected consequences of PA execution and behavioral performance; "regulatory processes" which are the behaviors or cognitions that people deploy to translate their initial intentions into PA-related behavior; and "reflexive processes" which denote the impulsive and automatic processes involved in action www.nature.com/scientificreports/behavior."Reflexive processes" include affective attitudes (expected feelings during PA), instrumental attitudes (expected utility of engagement in PA), perceived opportunity (time and access of engagement in PA), and perceived capability (perceptions of ability to engage in PA).These constructs are considered to be antecedents of intention formation."Regulatory processes" include goal setting, self-monitoring, action planning, and coping planning, which are collectively classified as behavior regulation.Regarding primary "reflexive processes" we can draw a distinction between habit (routine behavioral action performed by cues) and identity (association with a particular role through self-categorization).
The third specific tool consists of the ASAFA scale (Social Support Scale for Physical Activity in Adolescents) 44 , translated into Italian.This tool refers to the SS received by adolescents in performing PA considering three distinct actors: family members, friends and, for those who practice structured physical activity, the people responsible for their training.Social support is described as the assistance offered, or the resources made available in situations of need by different groups, such as parents, siblings, relatives, friends and others.It can be measured by the individual perceptions of the degree to which interpersonal relationships correspond to certain functions (instrumental/direct, psychological/emotional, instrumental/informational) 45 .In the context of PA, SS is one of the main constructs for theories and models that are used in the study of factors associated with physically active behavior.Indeed, SS is consistently associated with higher levels of PA in adolescents 46,47 and can be offered through incentives, such as shared practice, transportation and assistance provided by key sources of support, including parents, friends and coaches 48,49 .
Both the M-PAC and AFASA tools contain questions (typically on Likert scales) referring to the period of the survey (post-COVID-19) and to the pre-pandemic (pre-COVID-19) period, with the clear aim of investigating any possible changes that may have occurred in the interim.Certainly, the long interval poses serious problems mainly related to the challenge of remembering past habits, and above all -due to the age of the respondents-to changes that may have occurred in their PA habits, regardless of the pandemic crisis.Despite these potential challenges, and in the absence of other information, the investigation was structured as a longitudinal study, but included a retrospective reconstruction of the first observational period.
The last section of the questionnaire concerns the subjects' sociographic information.

Survey design
The survey targeted third-year middle school students in the Marche region in Central Italy.Subjects ranged in age from 11 to 14 years; hence, the target population was equal to 55.711 units (ISTAT 2022 data).
For the choice of the sample size, assuming in the first instance, a simple random sampling, and accepting a maximum estimation error of 5%, a minimum size of about 400 students, corresponding to about 23 classes, is obtained.Subjects were recruited through the Regional School Office (Ufficio Scolastico regionale-USR) for the Marche Region-Coordination for Physical and Sports Education.The Office contacted individual physical education teachers, probing their willingness to participate in the initiative.A total of 43 classes, 952 students, agreed to take part in the study.The teachers were duly informed of the aims of the initiative and provided with detailed explanations regarding both the contents of the questionnaire and its correct completion by their students through two training sessions for teachers.At the request of the teaching staff, a video presentation and explanation of the research was also provided to introduce the questionnaire and explain to students how to complete it properly.The video was made available online to all subjects participating in the survey.(The video is available at: https:// drive.google.com/ file/d/ 1uF7c AWp-c1v6J hW6yK ch-rEsEb 80wswy/ view?usp= drive_ web.Accessed on 03/12/2023).

Data collection
The questionnaire was administered in the form of a web survey.The survey, produced in an electronic format using an appropriate IT tool (Google Forms application), was first tested by submitting it to a class in their last year of middle school.It was then made available to the entire sample, with online access via the appropriate URL.All the steps envisaged for completing the questionnaire at school required less than one hour.
During the data collection, which lasted for about two months in the spring of 2023, two teachers informed the Authors that they would be unable to collect data from their classes, reducing the target population to 902 subjects divided among 41 classes.
Subsequent data processing relied on the immediate availability of information in an electronic format (Excel spreadsheet).Some preparatory and other specific processing was carried out using Excel, while the bulk of the processing work was done using the SPSS package.

Data analysis
It wasn't possible to proceed with the construction of a sample appropriately stratified on the basis of geographical variables.Nevertheless, the data obtained were re-weighted in order to propose a scenario attributable to the entire regional territory.Considering the five provinces and the same number of classes for the demographic size of the municipalities, 25 types of territory were identified (in reality 21, since no municipality referred to 4 of them), providing the aforementioned reweighting of the sample cases with the relative data.

Statistical analysis
Data processing involved the construction of many aggregate measures, on which analyzes were conducted aimed at verifying the validity of the hypotheses formulated.The t-test was used for single comparisons between groups, while ANOVA analysis with subsequent Post-Hoc analysis through the Scheffe test was used for multiple comparisons.Prior to this, the measurements were tested for normality using the Kolmogorov-Smirnov test.Subsequent analyzes were "forced" even when normality was not guaranteed, relying on the symmetry and marked unimodality of the score distributions.The effect size (Cohen's d) was calculated where differences were significant.Further analyzes on the relationships between the aggregate measures were done using Pearson's correlation coefficient.

Participation in the survey
On the date of the information extraction, 683 of the 902 identified subjects had completed the survey, indicating a "gross" participation rate of 75.7%.In fact, a check carried out on the data excluding the classes that had not participated, reduced the effective population to 770 subjects with an actual response rate equal to 88.7%.

Sociographic variables
The reweighted sample reflects, with roughly equivalent shares, the gender composition of the Marche region (ISTAT data), with a slight overrepresentation of the female population (53.6 vs 51.4%).
Given the specific sample group that was chosen for the study, the age of the respondents (average = 13.3 years) is not very informative and clearly reflects their belonging to classes in the third year of middle school.
The variables of the sociographic framework are interesting.The first provides us with information on the educational background of the parents/family members.It is striking that about a quarter of the subjects did not know this information (25.8%), while the reported percentage of at least one parent holding a college degree appears very generous (40.5%).
Based on the questionnaire, about two out of three parents practice sport in some form (67.2%), while as many as one out of seven is a professional (14.4%).We do not have data to verify the accuracy of either of these findings.

Participation and measurement of physical activity and sociographic information
The quantities of PA found allow us to investigate the possible presence of different behaviors that may be attributable to the sociographic characteristics of the adolescent sample group.The data were thus subjected to an appropriate analysis (dependent-samples t test and ANOVA analysis), which revealed that in some cases there were statistically significant differences (Table 2).The first thing that emerges is the great variability of the data with values of the standard deviation close to the mean values.This clearly makes comparisons difficult, so we will limit ourselves to commenting only on the significant results.The first of these differences concerns moderate physical activity (MPA), with males (267′) significantly more engaged than females (235′).Regarding vigorous physical activity (VPA), the values recorded in families in which adults engage is PA (351′) exceed those where this does not occur (293′).Furthermore, having a family member who engages in PA professionally, in addition to increasing PA, also reproduces the same gap (405′ vs 316′).It would therefore seem justified to conclude that having an example in the family determines at least imitative behavior.

Control-action framework indicators (M-PAC) and amount of PA
As mentioned in the discussion concerning methodology, section B of the questionnaire represents the first part of its core, applying the M-PAC tool to two distinct moments: current/future and pre-COVID-19.M-PAC itself is highly complex and its construct includes several distinct dimensions, each of which is made up of Table 2. Amount of weekly physical activity in relation to the sociographic characteristics of the respondents (n = various).Values 1' .*One or more significant comparisons at 0.05 (dependent-samples t test; ANOVA analysis).**One or more significant comparisons at 0.01 (dependent-samples t test; ANOVA analysis).In the ANOVA analysis, post-hoc analysis was conducted using Scheffe's test.For comparisons that were significant, the effect size (Cohen's d) was calculated, obtaining values ranging from small (d = 0.15) or less to medium (d = 0.30).Once the description for each dimension has been made, the internal coherence of the component items is calculated after transforming the attributes on a Likert scale into the same number of equally spaced numerical values, an operation that is not without risks, but is widely practiced.Once this property has been ascertained or accepted, it is possible to construct a summary measure for the entire dimension by adding up the scores related to the individual items, then proceeding with a subsequent normalization.

Items
All the average values of the summary indicators are summarized so that an immediate comparison between the relative dimensions can be drawn (Table 3).At first glance, it can be noted how the dimensions referring to affectivity, instrumentality, abilities and opportunities, to which we can add intention for the immediate future, constitute on the whole, a block with higher values than those recorded for the other dimensions, namely behavioral regulation, habit and identity.Indeed, the M-PAC tool shows a slight discrepancy between intentions and behavior with higher values for the former.
According to the findings of the present study, the increases in the normalized indicator values related to adolescents' PA cognitive processes and habits would seem to corroborate the hypothesis of their intention to adopt more virtuous behaviors in the post-pandemic phase.Indeed, on the basis of what was reported by the participants, there were increases in all indicators of the M-PAC tool in the post-pandemic phase compared to the pre-pandemic phase.The relative increases are clear and the most sizeable are found in the dimensions related to habits (0.66 vs 0.50, + 32%), identity (0.70 vs 0.55, + 27%), and behavioral regulation (0.57 vs 0.46, + 24%), while the smallest increases are found in instrumental attitudes (0.83 vs 0.72, + 15%) and opportunities (0.68 vs 0.58, + 17%).It is therefore clear that the COVID-19 pandemic has changed the life behaviors of adolescents, affecting their habits and attitudes related to PA.However, it is possible that other causes may have also played a role in bringing about such changes.

M-PAC indicators, amount of PA and sociographic characteristics
In the description, it can be observed how the availability of summary measures helps in the search for possible links between M-PAC indicators and the sociographic variables that identify the students, to which we added those relating to the amount of reported PA.From a methodological standpoint, the analysis of variance was always used in the case of qualitative sociographic variables, while the calculation of the correlation coefficient was used when both were quantitative.The summary data are illustrated in Table 4, and once again, we only considered the statistically significant indications.
As regards the amount of PA performed, we immediately note how moderate PA shows no relationship of any kind, except for the habit dimension (0.18).It thus appears that this level of physical activity, i.e. when one does only a little movement, is not associated with particular attitudes and strategies, and it is not surprising how the aspects of a habitual nature find a weak but significant relationship.In the case of VPA, the picture changes radically, with intense physical activity showing relationships, not high but significant, with all the dimensions considered by the M-PAC tool.Notably, here as well, it can be observed that the strongest relationship is with the identity dimension (0.51), showing that being protagonists in the field of sports greatly contributes to forming personality both in one's own eyes and in the eyes of others.
Moving on to the sociographic variables, many significant differences can be observed.Once again, the habit dimension differentiates males and females to the detriment of the latter.In the case of parents' educational background, there clear differences, with the recurring pattern rewarding the children of parents with high school diplomas or college degrees to the detriment of those without at least one of those qualifications.There is also a widespread presence of significant relationships for adolescents whose parents practice PA, with this characteristic increasing the values of almost all the summary indicators.This driving role is also played by parents who practice physical activity professionally.In this case, however, the differentiation is significant only for the 'identity' indicator.The educational background of parents is here, more than any other variable, decisive in all the aspects surveyed.Having parents who practice sports seems to be more directly related to capacity, identity, intention, attitudes and opportunity, while having at least one parent who practices sport professionally affects 'identity' .Let us now move on to the second cornerstone of the central part of the questionnaire (panel C) referring to the support received by those who practice PA from the social environment, specifically from family members, friends and coaches, with the latter figure being relevant only for those involved in competitive sports in sports clubs.For each of the three reference figures, the questions ask respondents to evaluate to what extent they receive support in terms of encouragement, sharing in the PA, logistical support provided to help pursue the PA and positive feedback received regarding athletic performance.Here too, for each of the figures, the presence of a onedimensional construct was verified, obtaining indications of acceptable or good consistencies.The construction of summary indicators, referring to the three different figures, was thus provided.The indicator referring to the family (Table 5) shows that it provides a fair amount of support (0.54), substantially in line with the support received from friends (0.53), at least in the current period, whereas in the prepandemic phase, the support received from friends was considerably lower (0.38 vs 0.50).The support provided by coaches, who are very engaged and supportive, appears to be very positive, especially in the post-pandemic phase (0.71 vs 0.59, + 20%).However, bear in mind that here we are referring only to adolescents involved in competitive sports, and in this case, they rely on coaches not only for technical but also for emotional support.Table 4. Comparisons between the summary indicators for the M-PAC dimensions assessed in the current period, the amount of physical activity currently performed and the sociographic characteristics of the respondents (n = various).*One or more significant comparisons at 0.05 (dependent-samples t test; ANOVA analysis).**One or more significant comparisons at 0.01 (dependent-samples t test; ANOVA analysis).In the ANOVA analysis, post-hoc analysis was conducted using Scheffe's test.For comparisons that were significant, the effect size (Cohen's d) was calculated, obtaining values ranging from small (d = 0.15) or less to medium (d = 0.30).Here we describe framework C of the questionnaire, which aims to find possible links between the summary measures referring to the groups of subjects who provide support to the students and sociographic variables, including those related to the amount of PA reported by the subjects.The summary data referring to the analyses carried out are illustrated in Table 6 and, as is now established practice, in the comments we will limit ourselves to the statistically significant indications.There does not appear to be any relationship between moderate PA and the support provided.In fact, this type of activity is often considered a recreational activity and therefore is unlikely to be viewed as an activity requiring support from parents and friends.Intense activities are clearly different.Indeed, here we see a relationship, not strong but nonetheless significant, between the amount of hours dedicated to intense PA and the relative values of the indicators of support received, confirming that increasing commitment requires adequate support.

Item
Having a family member with an educational qualification leads to an increase in the family support indicator.The same heightened support is also found when parents practice PA or do it professionally.Here, we can hypothesize that family engagement in PA reflects a different level of sensitivity to PA on the part of the family members.
By far, the figures who provide the most support, compared to family and friends both in the pre and post COVID-19 phases, are professional coaches.Coach support for sport and PA appears stronger in the post-COVID-19 phase.

M-PAC indicators and social support
Finally, we investigated a possible correlation between the indicators relating to the SS received and all the indicators related to the dimensions of the M-PAC instrument.The underlying hypothesis is that attitudes and processes regarding PA are also the result of a peaceful and participatory environment of family and friends, from which the young person who practices PA receives help and support.The same is true of the social environment of sports clubs.Indeed, the study of the reciprocal correlations (Table 7) shows a widespread presence of uniformly positive and highly significant relationships (p < 0.01).In the case of the current period, the correlation coefficient ranges from a minimum value of 0.09 (very weak relationship) up to a maximum of 0.38, with the highest values referring to the identity dimension of the adolescents.A similar, and even more comforting picture can be observed in the pre-COVID-19 period.Here the correlation coefficients range from a minimum of 0.21 up to a maximum of 0.54, with the highest values also attributable to the identity dimension.
Having confirmed the overall pattern of stronger correlations in the pre-Covid period, one wonders what a possible explanation might be.The data are helpful in providing elements supporting the hypothesis that the changes that occurred may have increased adolescents' independence, leading them to emancipate themselves from the support received in each of the M-PAC framework dimensions.This fact that the adolescent subjects were older in the post-Covid phase may have also contributed to their greater independence.Table 6.Comparisons between the summary indicators by the type of subjects providing support to the subjects evaluated in the current period, amount of physical activity currently performed and the sociographic characteristics of the respondents (n = various).*One or more significant comparisons at 0.05 (dependentsamples t test; ANOVA analysis).**One or more significant comparisons at 0.01 (dependent-samples t test; ANOVA analysis).In the ANOVA analysis, post-hoc analysis was conducted using Scheffe's test.For comparisons that were significant, the effect size (Cohen's d) was calculated, obtaining values ranging from small (d = 0.15) or less to medium (d = 0.30).

Discussion
This study focuses on adolescents' cognitive processes, behaviors and SS as they relate to PA before and after the pandemic.It contributes to the knowledge of the changes that occurred in some personal attributes and social aspects in relation to PA in adolescents as a consequence of the COVID-19 pandemic.The knowledge of these changes correlated with PA engagement in the post-pandemic phase, clarified their impact, and it can help to formulate appropriate strategies for interventions to promote PA during pandemics and other global crisis.Increasing values were found in the post-COVID-19 phase for all the cognitive processes and attitudes, in particular, those regarding habits (0.66 vs 0.50, + 32%) and identity (0.70 vs 0.55, + 27%) related to PA. Significant correlations were found between these values and VPA engagement and between the values of the same indicators and SS (p < 0.01).The strongest relationship was found with the dimension of identity (r = 0.51; r = 054).
Overall, the results of the survey confirm what is already known in the literature regarding the commitment to PA in relation to the gender of the practitioners [50][51][52] and the role played by the parental figures in the choice of PA practicing 53,54 .In particular, males result more in the habit of practicing PA than females.Parents who have a diploma or degree, practice PA and are sports professionals exert an imitative effect and influence their children's decisions to participate in PA.
The results suggest that pandemic-related restrictions impacted the M-PAC indicators related to PA in adolescents.In general, adolescents now seem willing to adopt more virtuous attitudes and behaviors in PAMV, as evidenced by the values reported in attitudes, skills, opportunities, behaviors, habits and identities in relation to PA.Indeed, on the basis of what the subjects reported, there were increases in all indicators of the M-PAC tool in the post-pandemic phase compared to the pre-pandemic phase.The relative increases are clear and the most conspicuous are found in the dimensions of habit (0.66 vs 0.50, + 32%), identity (0.70 vs 0.55, + 27%), and behavioral regulation (0.57 vs 0.46, + 24%), while the smallest increases are found in instrumental attitudes (0.83 vs 0.72, + 15%) and opportunities (0.68 vs 0.58, + 17%).
The significant relationship found in previous studies 12,13 between habit and PA in adolescence is confirmed.In fact, in our research, habit appears to be the M-PAC indicator most significantly correlated to the amount of both moderate and vigorous physical activity.The pandemic seems to have changed habit towards PA, and this change seems to have favored PA involvement in the post-Covid phase, although it is a country (Italy) where heavy restrictions have been applied.This result is in line with the results reported by the Schöttl study 8 .
With regard to intention in PA for the immediate future, equally positive values were reported (58.2% of subjects declared a commitment to MVPA for 150′ a week to be extremely probable).Although intentions are not always a strong predictor of behaviors, they are considered weak to moderately related to PA 39 .Perhaps most importantly, intentions are considered a necessary condition for most people to engage in behaviors of participation in PA 55 .They are a necessary but not sufficient condition.Perceived attitudes and abilities, which in the survey show an increase in the post-pandemic phase, also play a role in the formation of intention and should remain stable even in the face of major changes and critical issues.
In our study all the indicators of the M-PAC tool show significant correlations with the amount of vigorous PA.This result confirms the thesis expressed by Cury 17 .Nevertheless, in our case this result demonstrates di be also extendible to adolescents' PA engagement in the post-pandemic phase.
As regards the amount of PA performed, moderate intensity PA does not appear to show significant relationships with the M-PAC dimensions, except for the dimension of habit (r = 0.18, p < 0.01).In the case of vigorous PA, the picture changes radically, with vigorous PA showing significant relationships (p < 0.01) with all the dimensions considered by the questionnaire.The strongest relationship was found with the dimension of identity (r = 0.51), demonstrating that being a protagonist in PA contributes greatly to developing one's personality, both in one's own eyes and in the eyes of others, in particular, in the case of vigorous PA.Probably many adolescents feel the need to provide for self-identification through PA recognizing themselves as physically active, this occurs to a greater extent after the uncertainties related to the experience of the pandemic, and therefore to a greater extent than in the pre-COVID-19 when they were younger and hadn't yet experienced the pandemic.Regarding identity, we find that this indicator is associated with PAMV also in the post-pandemic phase: this result integrates the results of the research developed by Kwan et al. 15 .In our study a significant relationship is found between PA and all the dimensions of the M-PAC instrument, but the strongest relationship occurs with the identity dimension.In fact, as physical activity amount increases the identity values also increase, as shown by the value of the correlation coefficient (0.51).
Another notable finding was the increase in regulated behavior after the COVID-19 pandemic (0.86 vs 0.76).This finding suggests that the restrictions led to the adaptive use of behavioral regulation skills such as action planning and coping, and to plan for and deal with potential or unexpected problems.Since many of the restrictions imposed likely caused disruptions in typical behaviors, adolescents have found themselves forced to strategically formulate and implement new plans for being physically active.Our results suggest that in addition to efforts to help increase intention toward PA, potentially tending to decrease during critical phases, more emphasis should be placed on helping adolescents regulate their behaviors through self-monitoring, setting goals, planning and managing major changes in order to become more resilient and bridge the intention-action gap, regardless of ever-changing circumstances.
As a confirmation and as an integration of the same study by Kwan et al. 15 , we found that coping is significantly associated with PAV also in the post-pandemic phase.Indeed, in our study regulated behavior after the COVID-19 pandemic is shown to be related to the amount of PAV, suggesting that PAV represented a tool for adolescents to acquire adaptive use of behavioral regulation skills such as action planning and coping.
Finally, our analysis of the interrelationship between the indicators relating to SS and the attitudes and processes regarding PA showed positive and highly significant correlations (p < 0.01) across the board.In the case of the current period, the correlation coefficient ranges from a minimum value of 0.09 (very weak relationship) up to a maximum of 0.38, with the highest values referring to the identity dimension of adolescents.The same pattern was found in the pre-COVID-19 period.Here the correlation coefficients range from a minimum of 0.21 up to a maximum of 0.54, with the highest values again attributable to the identity dimension.
The results of this study relating to SS confirm the importance it has for maintaining involvement in PA during the pandemic and in contexts of social restrictions, as affirmed by Ng et al. 20 and by Hailey 18 .In our study these results prove to be also extendible to the post-pandemic phase.Here we found a not intense but still significant relationship between the social support received and the amount of PAV practiced.SS from different sources appears significantly correlated with the amount of PAV, with the following correlation coefficients: family (0.22), peer group (0.25) and coaches (0.15).
In our study a positive correlation is found between all M-PAC indicators and SS, but this correlation is less strong in the post COVID-19 phase compared to the pre COVID-19 phase.An explanation here requires a consideration of other variables such as students' increased age in the transition between the two periods considered and a possible increased request for autonomy and emancipation from the significative others.
Future research should focus on the whole spectrum of personal and social attributes that can influence physical activity engagement during pandemics, so as to prevent post-pandemic declines of PA with the already known effects on adolescents' health and well-being in their transition to adulthood.
While this study presents new findings, it has several limitations that need to be acknowledged.The first limitation is of a temporal nature, as we could not capture the initial changes in PA behaviors and cognitions during the onset of the COVID-19 pandemic.By the time students were administered the questionnaire in April-May 2023, they may have already adopted strategies to better cope with the unique challenges of the pandemic years.Second, PA-related behaviors were measured using self-report assessments and are therefore susceptible to overreporting due to social desirability biases 56 .However, the use of the IPAQ-SF as a self-report measure for MVPA is a strength, considering that it is one of the most commonly used self-report questionnaires for measuring PA in the literature, allowing for comparisons between studies.Finally, given that this study took place in a single geographic area, these findings may not apply to other regions or countries that may have implemented different COVID-19 pandemic restrictions. https://doi.org/10.1038/s41598-024-60548-y

Table 1 .
Structure of the questionnaire (skipped questions are excluded).

Table 3 .
M-PAC indicators.Average values (AV), standard deviations ((SD)) and internal consistency (Crombach's Alpha) of summary section indicators in the present or near future and in the pre-COVID-19 period (n = 651).

Table 7 .
Correlation coefficients between summary section indicators of support received in carrying out physical activity (ASAFA Instrument) and summary section indicators of the M-PAC Instrument in the present or near future and in the pre-COVID-19 period (n = various).**p < 0.01.