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(a) Pattern of static work (W (J)); (b) reaction time (RT (ms)); (c) RMS (%) of the flexor digitorum superficialis (FDS) EMG expressed as a percentage of the RMS‐EMG of the maximal voluntary force of the FDS; (d) spectral deflection of median FDS‐EMG frequency (mf (Hz)); (e) heart rate (HR (bpm). Black bars: loaded; white bars: unloaded (*P < 005, **P < 001).
