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Why a Calorie Deficit Can Make It Harder to Build Muscle

15 July 2026

Listen to the full episode of unPAUSED with Dr. Stacy Sims here: For decades, women have been told that eating less is the key to changing their body composition. But building muscle and protecting bone requires something different. As Dr. Stacy Sims explains in this episode of unPAUSED, your body cannot build new tissue if it believes resources are scarce. When you're consistently under-fueling, in a significant calorie deficit, or combining intense exercise with too little food, your body prioritizes survival, not muscle growth. That's why the conversa… Video by YouTube channel.

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