"There has to be a coiling/twisting/spiralling element of the myosin filaments to generate great elastic energy."
The coiling/twisting/spiralling is created between joints. There might be twisting at the ankle, the knee, the hips..... But there is simply no evidence that you can cause your myosin filaments to twist. In fact the conformational change between myosin and actin filaments is regulated by chemistry and cannot be changed by coiling between your joints. It may be possible that this coiling takeoff results in a much stronger contraction, but the effect would be neural not a physical change in myosin filaments.
Exactly^^^
That twist stresses the CNS into better recruitment since there will be an increased tension generated by the twist.