"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." If you’ve ever been posted up at the squat rack, wondering how heavy you can lift, there’s a simple way ...

If you’ve ever been posted up at the squat rack, wondering how heavy you can lift, there’s a simple way to figure out just how strong you really are. Enter: the one-rep max (1RM), or “the maximum ...