"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’re one of Meggan Grubb’s 1.3 million Instagram followers, you’ll know she’s no stranger to a bum workout. The fitness trainer and mum to 18-month-old daughter Winnie regularly shares snippets ...

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 ...