Figure 3.

Torque loss and recovery from a fatiguing bout of isometric contractions by the anterior crural muscles from Vibration and Sham mice that maintained normal cage activity (Active) or were restricted in their physical activities (Restricted). Fatigue was calculated as the percentage of torque relative to peak torque during the 120-contraction protocol. Plotted are the relative torques of every fifteenth contraction during the protocol. Peak isometric torque generated 5 min later is also plotted. For each group, this recovery torque was not different than peak isometric torque before the protocol began, indicating that the torque loss represented transient fatigue as opposed to a more lasting muscle injury. There were no differences among groups in torque during or after the fatigue protocol. Data are means, SE. Error bars not seen are contained within symbols.