Figure 1.
Erun and muscle energy cost in male and female runners. Whole-body energy cost per stride (top) estimated across three relative running speeds expressed as % of speed at lactate threshold in three groups: Elite males (EM), trained males (TM), and trained females (TF). Bottom: AT energy release (solid bars) relative to the estimated muscle energy cost (hatched bars) for each group and speed, respectively. EMc, TMc, and TFc represent the energy cost for elite males, trained males, and trained females, respectively. From Fletcher and MacIntosh (2015).