Jessica Matthews by Jessica Matthews
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A common belief is that you should use light weights and complete a high number of repetitions if your desire is to "tone," and use heavy weights and perform a low number of repetitions if your goal is to "bulk up". ACE's Jessica Matthews explains what you really need to know to reach your goals.

Precision Nutrition Level 1 –
The Essentials of Nutrition and Coaching

Master the science of nutrition and the
art of behavior change coaching.

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