905612.fig.001a
(a)
905612.fig.001b
(b)
905612.fig.001c
(c)
905612.fig.001d
(d)
Figure 1: Stack plots of the change in (a) ATP turnover and key phosphagen system metabolites during 3 minutes of intense exercise to volitional exhaustion. (b) Creatine phosphate, (c) inorganic phosphate, and (d) ATP.  Note the well maintained preservation of muscle ATP for most of the duration of the exercise bout.