squat thrust

noun

an exercise in which the hands are kept on the floor with the arms held straight while the legs are straightened out behind and quickly drawn in towards the body again

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012