This article originally appeared in Shape.

Chances are, those 20-pound dumbbells you've been lifting might not feel as challenging as they used to be. But because of the recent shortage of exercise equipment, it can be hard to come by a heavier set of weights. Plus, you might not exactly be jazzed about turning part of your living room or bedroom into a home gym.

Fortunately, all you need to level up your heavy lifts is a good ol' resistance band.

"When working out outside of a traditional gym, many people don't have access to heavy weights, so adding resistance bands can be a great way to add more resistance without having to purchase additional bulky weights," says Tatiana Scott, a certified personal trainer based in Houston, Texas. (Related: The Perfect Strength Training Workout for Beginners)