Quote:
Originally Posted by dyna mo
i don't see how muscles can atrophy if they are being used? i've gained muscle on p90x.
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I don't see how that's possible dynamo. If anything, you've toned out. When you're on a caloric deficit, muscles need a reason to grow or at the very least, stay the way they are while you're burning fat. The only way to keep them is to get your minimum protein intake and lift heavy the grow new muscle fibers. You'll just tone out and lose muscle on the P90X.