(a) The mean rate of ATP (mmol min−1) production from carbohydrate oxidation (ATPCHO) during 6 h of rest following administration of Gx or P at 0 h. The upper inset panel shows the mean (+s.d.) within-subject difference due to treatment at each of the time points. Half-hourly values have been omitted for reasons of clarity. (b) The mean total ATPCHO (mol) produced by the end of each hour. The mean difference (+s.d.) between treatments in total ATPCHO is shown in the lower inset panel. The effect of treatment was significant from 3 h onwards. *A Student's t-value of >2.306, which was significant (P<0.05) with 8 degrees of freedom. Half-hourly values are again not shown although half-hourly rates were used when calculating the total produced by the end of each hour.