From: Immediate effect of trunk flexion and extension isometric exercise using an external compression device on electromyography of the hip extensor and trunk range of motion of healthy subjects
Onset
Pre
Post
t
p-value
Cohen’s d
Time (s)
− 0.38 ±  0.37
− 0.28 ±  0.30
− 2.216
0.033*
0.3