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Figure 3 (A) Exercise capacity on the treadmill of transgenic (TG) (open squares) and nontransgenic (NTG) (solid circles) mice at the end of the four-week swim training. (B) Ratio of left ventricular (LV) weight to body weight after four weeks in exercised and non-exercised groups. Solid bars = NTG; open bars = TG. *p < 0.05 versus respective non-exercised group (n = 4 to 6 in each group).