Fig. 6. The duration of electromyographic (EMG) activity (min) observed over the entire recording day for the same muscles as in Fig.5. The x-axis is labeled as for Fig.1. Values are means ± S.E.M.; N=4, except for F7/8 (N=3). Colored symbols and lines indicate significant differences as in Fig.2. The duration of activity for the Sol in-flight was greater than pre-flight (P=0.03). No differences in the duration of the active EMG periods were observed for the MG. The in-flight TA EMG duration was greater than pre- or post-flight values on each test day (P=0.0001). The P levels for the ANOVA main effects are shown.