Timothy Walters Kleinert
Basically, the human arm or leg simply isn't as flexible as a towel or whip, so I don't see how a human limb can transfer energy in the same way. Furthermore, the power of a towel/whip comes from the "flicking" motion.
Yes, the human body in most cases is not as flexible as the towel or whip. However, the wave or kinetic chain would seem to me to be generated from the center outward if transfering energy or inward if grounding energy. To make that happen would only require relaxed connection, grounding and the ability to vibrate, pulse, or whatever you want to call it, one's center.