( CNN) We’ve all been there: Only when you’re get into the groove of your new workout preoccupation — wham! Suddenly your knee is killing you, or your quads are hurting in a way that just doesn’t feel right. Yep, you’ve over-worked yourself into an injury — and are abruptly wondering why you didn’t take a few more rest days along the way.
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So what gives? First, it’s important to understand physiologically, what happens when we workout. “When you exert, you’re causing a bit of trauma to the body, ” says Noam Tamir, Certified Strength and Conditioning Specialist and owner of TS Fitness New York City. Essentially, when you exert, you make micro-tears in your muscles. Then, when your muscles repair, they grow stronger.