Longitudinal sections of tendons stained with Toluidine Blue. a- control sedentary; b- H. aphrodisiaca sedentary; c- control trained; d- H. aphrodisiaca trained. Observe intense metachromasy in trained groups (c, d). The treatment with H. aphrodisiaca accentuated metachromasy in sedentary (b) as well as trained (d) rats, compared with their respective controls. Scale bar = 25 μm.