Figure 3.

Changes in physical performance over the intervention period. (A) Maximum running speed (mean ± standard deviation). P-values indicate differences from control group (post hoc Scheffé test). (B) Courses of submaximal exercise heart rate (means ± standard error). Letters (a-c) on x-axes indicate the final three steps preceding the transgression to the ramp-shaped phase of the exercise tests. Group × test × step interaction: P = 0.039.

Hecksteden et al. BMC Medicine 2013 11:235   doi:10.1186/1741-7015-11-235
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