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Average maximal isometric plantarflexor force normalized to body mass (BM) (A) or gastrocnemius muscle mass (B) in young and old Hsp25+/+ and Hsp25−/− mice. †Significant main effect of age (P < 0.0001 and P = 0.0002, respectively). Data are presented as means ± SE, n = 8 for all groups.
