Figure 7. Combined loss of skeletal muscle PGC-1α and β results in rapid depletion of muscle glycogen during exercise.
(A) Mean glycogen levels (+/− SEM) of GC muscle of sedentary 2–3 month old male mice of the indicated genotypes is shown on the left. The results of GC glycogen levels post-exercise are shown on the right. (B) Mean blood lactate levels (+/− SEM) at baseline (white bars) and following exhaustive exercise (black bars) for all 4 genotypes (n=5–10/group). (Run-to-exhaustion protocol described in text and “Experimental Procedures”). * p < 0.05 vs. αβ+/+; ‡ p < 0.05 vs. α−/−; # p < 0.05 vs. β−/−.