In this episode, Dr. Layne Norton sits down with Professor Bill Campbell, PhD — Director of the Performance & Physique Enhancement Laboratory at the University of South Florida and a leading researcher on body composition, high-protein diets, and resistance training adaptations.
They discuss Bill’s high-protein studies in women (including physique athletes, contest prep, older adults, and time-restricted eating), sex differences in muscle growth and training adaptations, the menstrual cycle’s impact on performance, intermittent energy restriction, refeeds and diet breaks, and one major belief he completely changed his mind on (meal frequency).
Packed with practical, evidence-based insights on optimizing body composition, fat loss, and strength.
What got you into body composition research?
What is the focus of your lab?
You’ve done a few high protein studies in your lab. What have you found?
Tell us about your research on women and what you’ve found?
- A Case Report: Compositional, Physiological, and Psychological Responses to Contest Preparation in a First-time Bikini Competitor
- Effects of Adherence to a Higher Protein Diet on Weight Loss, Markers of Health, and Functional Capacity in Older Women Participating in a Resistance-Based Exercise Program
- High-Protein Time-Restricted Eating Alongside Resistance Training Reduces Adipose Tissue While Preserving Fat-Free Mass in Women With Overweight: A Randomized Controlled Trial
- Comparison of concurrent, resistance, or aerobic training on body fat loss: a systematic review and meta-analysis
Should men and women program their training differently?
- Current evidence shows no influence of women’s menstrual cycle phase on acute strength performance or adaptations to resistance exercise training
- The Effects of Menstrual Cycle Phase on Exercise Performance in Eumenorrheic Women: A Systematic Review and Meta-Analysis
- Sex differences in absolute and relative changes in muscle size following resistance training in healthy adults: a systematic review with Bayesian meta-analysis
Do women need more or less volume than men?
What is the most surprising result from any research study you’ve ever conducted?
Refeeds and diet breaks… what are they and where does the research stand on them?
What is a belief you used to hold strongly that you changed your mind on?
