It doesn’t matter how hard you work out—if you’re doing the moves wrong, then you’ll never see results. (You might even end up accidentally hurting yourself.) Here, two common mistakes you might be making when you’re doing a bicep curl, and what you should be doing instead.

Mistake 1: You’re sticking your elbows out when you curl up.
Instead, tuck your elbows in and keep them close to your sides as you engage your biceps.

Mistake 2: You’re curving your back and letting your shoulders droop.
Stand up straight and work those core muscles.