Contractile properties - specific force (sPo, gcm-2) and contraction time to peak twitch (TpT, ms) of soleus (Sol) and gastrocnemius medialis (GM) during reloading. The dotted line in each graph was the corresponding mean in unloading (TS) group. a) sPo - Sol: a reloading plus vibration (Vib) larger than TS, p<0.05; b Day 21 larger than TS, p<0.001; c Day 21 larger than Day 7, p<0.001; d Day 21 larger than Day 14, p<0.01; b) sPo - GM: a Day 21 larger than Day 14, p<0.05; c) TpT - Sol: a Day 21 slower than Day 14, p<0.05 (interaction, p<0.01); d) TpT - GM: a reloading control (Ctrl) faster than TS, p<0.001; b Vib faster than TS, p<0.001; c Day 7 faster than TS, p<0.05; d Day 14 faster than TS, p<0.001; e Day 21 faster than TS, p<0.05; main effects and interaction detected from Two-way ANOVA coupled with post-hoc Bonferroni test.