Video: Build your stair climbing power with step-ups

Step-ups are a gym staple, but they're just as easy to do anywhere you have access to stairs or a bench. This powerful lower body move will work your leg muscles and improve your knee stability.

Using weights adds a core challenge, too. Choose hand weights between 5 and 20 pounds — whichever allows you to complete 10 challenging reps with good form.

Watch to learn the proper form: Keep your chest up and your spine neutral throughout. And remember to alternate legs as you step up — it builds muscular symmetry.

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