Fig. 4From: Sex differences in muscle activity and motor variability in response to a non-fatiguing repetitive screwing taskBoxplots representing the absolute variability as the pooled cycle-to-cycle standard deviation of muscle activity (RMSSD) for the extensor digitorum, flexor carpi radialis, biceps brachii, and triceps bracchii. Boxplots are shown for day 1 (white), day 2 (light grey) and day 3 (dark grey), for males and females, and for start (rows 2 and 3)Â and end (rows 11 and 12)Â of the three measurement daysBack to article page