From your elementary school gym class to your current high-intensity interval training, it seems like no cardio routine is complete without at least one rigorous round of jumping jacks. But there's a ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." YOU MIGHT THINK back to your childhood gym class and remember learning the basics of physical fitness, ...

The jumping jack is an effective way to stimulate all the vital muscles of your body. It is a full-body exercise used in cardio and warm-up sessions. Jumping jacks include resistance and aerobic ...

JEFFERSON CITY (AP) - Get your arms and legs limbered up. Missouri lawmakers have OK'd an official state exercise. The Senate gave final approval Thursday to legislation that would make the jumping ...

Things high school gym class was good for: gossiping, checking out your wanna-be S.O. in track shorts, and kinda-sorta learning basic exercises. Jumping jacks were one such staple of P.E., and for ...