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TheActiveTimes.com: 4 Worthless Exercises You Probably Do

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Your Upgrade: Push-Ups

Push-ups are a safe and (happily) equipment-free exercise that builds muscle in the pecs, triceps and shoulders while developing core strength. What's more, it can be modified dozens of ways to work different muscles or increase the intensity and complexity of this tried-and-true, basic movement. There's a reason it was the foundation of fitness icon Jack LaLanne's routine.

(Credit: Shutterstock)
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The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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