Figure 5.

Panel A shows the discharge rate modulation on the ascending (filled boxes) and descending (open boxes) limbs of the contraction for the low pre, high and low post conditions. The boundaries of the boxes represent the 25^th and 75^th percentiles, while the line within the box represents the median value. Error bars above and below the box indicate the 90th and 10th percentiles respectively, and individual data points outside these values are represented by filled circles. Panel B shows the rate-rate modulation (r) of concurrently active motor unit pairs from low pre (triangles), high (circles) and low post (squares) test conditions. The dashed horizontal line indicates rate-rate modulation of 0.7, the minimum value required for inclusion in ΔF calculations (see text for more details).