Dr. Bill Campbell, Ph.D., FISSN, CSCS, is a Professor of Exercise Science and the Director of the Performance & Physique Enhancement Laboratory at the University of South Florida. His master’s and doctoral degrees were earned at Baylor University while serving as the Coordinator of the Exercise and Biochemical Nutrition Laboratory. He joined the faculty at USF in the Fall of 2007.

As a researcher and author, Dr. Campbell has published more than 150 scientific papers and abstracts (in academic journals) related to sports nutrition and physique enhancement. In addition, he is a paid consultant to professional sport team organizations, sport entertainment corporations, and also is a litigation consultant and expert witness related to dietary supplementation. Dr. Campbell has published three books on sports nutrition, including the NSCA's Guide to Sport and Exercise Nutrition and Sports Nutrition: Enhancing Athletic Performance.

His research is focused on improving exercise performance and enhancing physique through the synergism of resistance exercise, nutrition, and dietary supplements. Dr. Campbell is a fellow of the International Society of Sports Nutrition where he also currently serves as the organization’s President.

Here we delve into the following:

0:00- Intro
0:20- Operation Smile
0:40- Intro to Dr. Bill Campbell
5:05- Breaking into the fitness industry as a career
7:20- Refeed study
16:15- Factors that matter aside from calories
20:40- Diet break study with Menno Henselmans
23:20- How the refeed pendulum has swung
26:00- Who should incorporate refeeds / diet breaks?
29:40- Are there any negatives to refeeds?
32:20- How to fund a study
34:30- Compliance in a study
37:50- Bill’s personal training experience
40:30- What would a future study have to show?

Dr. Campbell's IG: https://www.instagram.com/billcampbel...

Smile Fund: https://secure.operationsmile.org/sit...