Coincidentally, they often accompany themselves with equally rhythmic movements of their hands and feet. (discovermagazine.com)
According to Umeå researcher Marius Sommer that is, who for four weeks has let experienced athletes perform specific rhythmic movements in time to a metronome. (sciencedaily.com)
For me, I make repetitive sounds, hums, moans along with rhythmic movements in my pelvis as I shift my weight from foot to foot. (onbeingmom.com)