Bill Campbell: The Physique Enhancement Professor
Bill Campbell: The Physique Enhancement Professor  
Podcast: The Dr. Layne Norton Podcast
Published On: Mon May 11 2026
Description: 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.SPONSORS• Workout Builder – Customized training programs for all experience levels: https://biolayne.com/workout-builder• Team Biolayne – One-On-One Coaching: https://biolayne.com/online-coachingLAYNE'S COMPANIESCarbon Diet Coach: https://joincarbon.com/podcastOutwork Nutrition: https://outworknutrition.comREPS Research Review: https://biolayne.com/repsWorkout Builder: https://biolayne.com/workout-builderTeam Biolayne: https://biolayne.com/online-coachingPhysique Coaching Academy: https://physiquecoachingacademy.comFOLLOW LAYNEhttp://www.facebook.com/laynenortonhttp://www.twitter.com/biolaynehttp://www.instagram.com/biolayneTIMESTAMPS0:00:00 - Intro0:02:53 - Career History0:10:58 - What is the Focus of Your Lab?0:15:48 - Physique Coaching Academy0:16:49 - High vs Low Protein Study0:36:45 - REPS Research Review0:40:19 - Animal vs Human Studies0:43:22 - Importance of Leucine0:45:55 - Arginine & Growth Hormone0:49:14 - Should Women Train Differently0:54:34 - Device Trackers vs Subjective Feelings0:57:38 - Squats1:04:48 - Injuries1:07:41 - Training Volume1:13:30 - Refeeds and Diet Breaks1:32:32 - Meal Frequency1:36:25 - OutroSHOW NOTEShttps://biolayne.com/podcasts/dr-layne-norton-podcast/the-physique-enhancement-professor-with-bill-campbell-episode-27