"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When life gets busy, it can be hard to squeeze in an endorphin-boosting workout each day (no shame!).

This 20-minute AMRAP workout strips leg day back to its basics. It features four moves, each chosen to target the biggest muscle groups in the lower body, to help you build functional strength. It's a ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Getty Images There ...