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Exercise tolerance and cardiac hypertrophy. (A) Total distance run on a treadmill. (B and C) Cardiac hypertrophy measured as heart/body-weight ratio (B) or membrane capacitance measured in whole-cell patch-clamp experiments (C). *P < 0.05. n = 7 WT, 5 SA (B); 45 WT, 46 SA (C).
