Table 1: Descriptive statistics for the frequency of leisure-time physical activity and academic performance.

From: Leisure-Time Physical Activity and Academic Performance: Cross-Lagged Associations from Adolescence to Young Adulthood

CharacteristicsNumber of participants (percentage)CharacteristicsNumber of participants (percentage)
Leisure-time physical activity at age 12N = 5,105School performance at age 14N = 2,923
 just about every day670 (13.1%) grade point average better than 9299 (10.2%)
 two to three times a week2,524 (49.4%) grade point average 8–91,273 (43.6%)
 two to three times a month366 (7.2%) grade point average 7–8979 (33.5%)
 two to three times in six months222 (4.4%) grade point average 6–7346 (11.8%)
 not at all1,323 (25.9%) under 626 (0.9%)
Leisure-time physical activity at age 14N = 4,715Student status at age 17N = 4,207
 just about every day949 (20.1%) not studying currently182 (4.3%)
 four to five times a week814 (17.3%) in vocational school1,426 (33.9%)
 two to three times a week1,418 (30.1%) in upper secondary school2,599 (61.8%)
 about once a week818 (17.4%)Educational attainment at age 24N = 3,218
 one to two times a month364 (7.7%) compulsory education128 (4.0%)
 less than once a month207 (4.4%) vocational secondary education917 (28.5%)
 not at all145 (3.1%) upper secondary education457 (14.2%)
Leisure-time physical activity at age 17N = 4,218 tertiary education1,716 (53.3%)
 just about every day800 (19.0%)SexN = 5,398
 four to five times a week717 (17.0%) male2,724 (50.5%)
 two to three times a week1,266 (30.0%) female2,674 (49.5%)
 about once a week686 (16.3%)Parental educationN = 4,927
 one to two times a month326 (7.7%) compulsory education1,479 (30.0%)
 less than once a month196 (4.7%) vocational secondary education1,417 (28.8%)
 not at all227 (5.4%) academic secondary education1,329 (27.0%)
Leisure-time physical activity at age 24N = 3,377 tertiary education702 (14.3%)
 several times every day83 (2.5%)Maternal leisure-time physical activityN = 5,100
 just about every day390 (11.6%) over 20 times a month875 (17.2%)
 four to five times a week556 (16.5%) 11–20 times a month1,046 (20.5%)
 two to three times a week1,114 (33.0%) 6–10 times a month1,310 (25.7%)
 about once a week641 (19.0%) 3–5 times a month825 (16.2%)
 one to two times a month314 (9.3%) 1–2 times a month550 (10.8%)
 less than once a month208 (6.2%) less than once a month494 (6.7%)
 not at all71 (2.1%)Paternal leisure-time physical activityN = 4,583
School performance at age 12N = 4,372 over 20 times a month557 (12.2%)
 grade point average better than 9154 (3.5%) 11–20 times a month768 (16.8%)
 grade point average 8–92,067 (47.3%) 6–10 times a month1,133 (24.7%)
 grade point average 7–81,816 (41.5%) 3–5 times a month834 (18.2%)
 grade point average 6–7323 (7.4%) 1–2 times a month624 13.6%)
 under 612 (0.3%) less than once a month667 (14.6%)