Calorie Counting Guide: Intake for Muscle & Weight Loss

Determining how many calories you need depends on your fitness goals, whether you are a marathon runner or a weightlifter. Use intake formulas to calculate your needs for muscle gain or sustainable weight loss.

Woman in exercise class

How to Prevent Catabolism of Muscle

Catabolism -- or the wasting of lean muscle tissue -- should be avoided at all costs. Not only do you get weaker and more prone to injury, your metabolism will slow, decreasing how many calories you burn at rest.

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