Douglas Harper's Etymology Dictionary
Wiktionary
isokinetic
a. 1 (context biophysics English) Relating to the force that a muscle applies during a limb movement at constant velocity 2 (context chemistry English) Reacting at the same rate (http://www.chemicool.com/definition/isokinetic_relationship.html)
Usage examples of "isokinetic".
It was the kind of vigorous workout described in brochures for expensive isokinetic machines.