Fig. 5. Mean integrated electromyographic (EMG) activity (mVs) observed over the entire recording day for the soleus (Sol), medial gastrocnemius (MG) and tibialis anterior (TA) muscles. The x-axis is labeled as for Fig.1. Only subjects with full data sets were used in determining mean values. 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 in-flight values for the Sol (P=0.07) and TA (P=0.002) for each day were greater than the pre- and post-flight values. No differences were observed for the MG EMG activation levels. The P levels for the ANOVA main effects are shown.