Iron Culture presented by MASS

Ep 377 – MRV/MAV, Diet Breaks & Refeeds

May 27, 2026·1h 12m
Episode Description from the Publisher

Back in episode 375, Helms and Trex briefly mentioned a few “evidence-based fitness” topics for which their views have evolved over the years. In hindsight, they didn’t give a few of those topics the time, attention, and explanation they deserve. So in this episode, Helms and Trex take a closer look at two key topics: maximum recoverable (or adaptable) training volume, and various approaches to strategically manipulating leptin levels (such as refeeds and diet breaks). If you're in the market for some new (ultra-high-quality) gym gear or apparel, be sure to use code "MRR10" for a 10% discount over at elitefts.com  Iron Culture is proudly presented by the MASS Research Review. Mostly because Helms and Trex are co-owners. massresearchreview.com  Chapters00:00 Intro04:11 The origins of MRV/MAV07:08 Updated perspectives on MRV/MAV14:26 Practically applying MRV/MAV17:11 Helms’ current volume adjustments24:30 Updating models in science29:20 The importance of leptin32:42 The origins of Trex’s interest in manipulating leptin38:47 Running studies on diet breaks and refeeds44:27 Recent meta-analysis on intermittent dieting strategies50:19 Trex’s current perspective on refeeds and diet breaks 53:47 Behavioral versus physiological effects59:09 Contextual use of intermittent dieting1:06:34 Wrapping up

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