Stretching of the muscles antagonistic to the extensors - namely, of the flexor muscles - reduces the jerk by inhibiting the extensor spinal nerve cells through the nervous impulses generated by the tense flexor muscles.
extensors of the toes and the peronei.
It also effectively conditions the long back extensors that run from the lower back to upper back.
FDL and FDB function is then balanced by the extrinsic extensors and the toe remains approximately straight.
The exercise did not effect the peak work load, peak oxygen uptake, or muscle function in knee extensors compared with the controls.