Table 2.

M-wave characteristics

	Group 1 (N = 39)	Group 2 (N = 33)
Rectus femoris
Delta M wave amplitude (%)	− 41 ± 4†	+ 14 ± 3***
Delta M wave duration (%)	+ 18 ± 3#	+ 2 ± 3***
Delta M wave latency (ms)	+ 2.65 ± 0.17	+ 0.07 ± 0.04***
Flexor digitorum longus
Delta M wave amplitude (%)	− 65 ± 4†	+ 22 ± 5***,#
Delta M wave duration (%)	+  ± 4	+ 8 ± 2
Delta M wave latency (ms)	+ 0.26 ± 0.07	+ 0.04 ± 0.05**

Maximal variations in M-wave amplitude and duration expressed as a percentage of resting values. Latencies measured at rest and at the end of the post-exercise recovery period. Symbols indicate that the changes in each group differ significantly from control values (i.e. rest data) (^#p < 0.01; ^†p < 0.001). Asterisks denote significant intergroup differences (***p < 0.001). Post-exercise variations in M-wave latencies are not significant