The Dr. Layne Norton Podcast Bill Campbell: The Physique Enhancement Professor
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May 11, 2026 
Bill Campbell, professor and director of the Performance & Physique Enhancement Lab, studies body composition, high-protein diets, and resistance training. He discusses high vs low protein trials in women. They cover sex differences in training, menstrual cycle effects, refeeds and diet breaks, and how he changed his view on meal frequency.
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Energy Balance Holds But Protein Is A Caveat
- Energy balance explains nearly all weight-loss research, but protein is a caveat because it increases thermogenesis and can prevent fat gain when overconsumed.
- Campbell notes protein's higher TEF and futile protein synthesis cycles can make overeating protein less likely to increase fat.
Leucine Threshold Drives Meal Protein Quality
- Leucine is the key amino acid that triggers muscle protein synthesis within whole-food meals.
- Campbell's work showed egg/whey produced larger MPS than wheat/soy and adding leucine to wheat matched whey’s response, implicating leucine threshold effects.
Program Women Like Men For Hypertrophy
- Do not routinely alter resistance training programming for women solely because of sex; apply the same hypertrophy principles as for men.
- Bill programs the same sets/intensity, modifying only sport-specific injury risks like ACL prevention.
