What is another word for jumping jack?
Pronunciation: [d͡ʒˈʌmpɪŋ d͡ʒˈak] (IPA) 
Jumping jack is a term widely used to describe a particular exercise move that involves jumping up and spreading the legs and arms apart while in the air, and landing back in the original position. This exercise move is also commonly referred to as star jump, half-jacks, side-straddle hops, and cross jacks. Star jump is similar to jumping jacks; however, the arms and legs are extended sideways to form a star-like shape. Half-jacks are a less intense version of jumping jacks, with limited arm extension and jumping motion. Side-straddle hops describe the exercise move in a military setting, and cross jacks involve crossing the arms and legs while in the air.
