Science has shown that low-rep, high-weight work—like in 5/3/1—builds the most strength, he says. But higher-rep work allows ...

How to Calculate One-Rep Max To calculate your 1RM, find out your five-rep max load first, Sung says. "This way, you're still working at a pretty high intensity, but you reduce the risk of of ...

A one-rep max (1RM) is the maximum amount of weight that you can lift for one repetition. Here's why it's important and how to calculate yours, per trainers.

Still, you can always use a calculator to figure out your one-rep max and use it as a tool, but it's not the end-all-be-all. The 1RM should be a guideline, but “our bodies are not machines ...