Figure 2.

Differences in exercise capacity during the light and dark-phases are independent of the variability of individual performance. In (A), total workload (kgm) is an index of exercise capacity. In (B), correlation analysis between light and dark-phase workload calculated for each animal (n = 11) was performed to identify whether differences in exercise capacity could be related to the individual chronotype. Pearson's r coefficient was 0.9141 and p < 0.0001. ^###Indicates p < 0.001 between phases. The results are expressed as the mean ± SEM (n = 11).