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Dr Stacy Sims reveals how much weight you should lift - and why it's important to go heavy

The exercise physiologist often says: 'If it doesn't challenge you, it doesn't change you' ...
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Here’s Exactly How Much Protein You Need To Build 1 Lb. Of Muscle

Picture this: You’ve finally committed to a strength training routine and you’re feeling strong. But now you’re deep in the numbers. Reps...sets...weight ...