Comparison of the time courses of performance and HD after a bout of complex cycle training A and C, time courses of the performance (assessed by the CVspeed). B and D, time courses of the HD (assessed by the AUC, area under the curve size/ISI). The results of two different groups of subjects are presented in A and B and in C and D, respectively. A and B, CVspeed was still improved 6 days after a single bout of complex cycle training while the AUC was still decreased, indicating an increase in HD. C and D, CVspeed was still improved 30 days after a single bout of complex cycle training while the AUC was almost back to its pretraining control value. In A and B, each dot represents the mean of 8 values. In C and D, each dot represents the mean of 7 values.