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In this podcast, I chat with scientist and friend Dr. Bill Campbell about a new study on rapid fat loss that came out of his lab.

In case you’re not familiar with Dr. Campbell, he’s a professor of Exercise Science and the Director of the Performance & Physique Enhancement Laboratory at the University of South Florida, who’s also published more than 150 scientific papers.

In other words, Dr. Campbell is busy conducting studies that test questions many of us have with answers we all want to know.

His latest study on rapid fat loss is a prime example. While most of us want to strip away fat as quickly as possible, we also don’t want to lose our hard-earned muscle in the process. So the question is, how aggressive should we be during a cutting phase to maximize our fat loss benefits and minimize any negative consequences of being in a deficit.

And that’s exactly what Dr. Campbell’s latest study looked at and the results actually changed his mind about rapid fat loss. In this episode, Dr. Campbell describes the study, the results, practical tips you can implement to lose fat as quickly as possible, and what future studies on this topic might look like.

So, if you want to learn about the latest research on losing fat fast without shriveling into an atrophied raisin of your former self, don’t miss this episode! Press play and let me know what you think.


15:28 – Why did the study you conducted change your mind about rapid fat loss?                                 

16:21 – How big of a deficit can you go into and for how long?                                

17:30 – What do you consider to be an aggressive deficit?                              

24:15 – What were the results of the study?                          

29:52 – What were the effects on RMR?         

32:32 – How does this compare to protein sparing modified fasts? What is a practical use for this rapid fat loss?                             

40:44 – What is the constrained energy model?                           

47:44 – What did training look like in your study?              

49:10 – How was compliance among participants?                             

50:17 – How did people feel on the diet?    

57:47 – Where would you implement this rapid fat loss in a cutting phase? At the beginning of a fat loss phase? Near the end?                                                   

1:02:02 – Where can people find you and your work?           

Mentioned on the Show:

Bill Campbell’s Instagram

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What did you think of this episode? Have anything else to share? Let me know in the comments below!