LYLE MCDONALD: INTERMITTENT MODIFIED FASTING: A NEW FRAMEWORK FOR FAT LOSS, PERFORMANCE & NUTRITIONAL PERIODIZATION | EP. 234

LYLE MCDONALD: INTERMITTENT MODIFIED FASTING: A NEW FRAMEWORK FOR FAT LOSS, PERFORMANCE & NUTRITIONAL PERIODIZATION | EP. 234

Author: Brandon DaCruz August 17, 2026 Duration: 1:31:45

When most people hear “intermittent fasting,” they immediately think about skipping breakfast, eating within an 8-hour window or going extended periods without food.


But Intermittent Modified Fasting is something very different.


On this episode of the Chasing Clarity Health & Fitness Podcast, I’m joined once again by Lyle McDonald to break down the framework behind his newest book, Intermittent Modified Fasting. This is the first interview Lyle has done since releasing the book. 


Rather than treating IMF as another fasting protocol, Lyle has brought together concepts from decades of his work on rapid fat loss, calorie cycling, training, body composition and sports nutrition to create a system for strategically distributing energy restriction across the week.


And that creates a much more interesting question than simply asking whether fasting “works.”


Can we manipulate where we place our calorie deficit to lose fat while better supporting training performance, recovery and lean mass retention?


Throughout this conversation, Lyle and I each give our perspectives on how these concepts can be applied in both physique-focused clients and athletes.


IN THIS EPISODE WE COVER:

WHAT INTERMITTENT MODIFIED FASTING (IMF) IS & WHY LYLE DEVELOPED IT

WHETHER INTERMITTENT FASTING HAS UNIQUE METABOLIC OR FAT-LOSS BENEFITS

WHY INCREASED FAT OXIDATION DURING A FAST DOESN’T AUTOMATICALLY MEAN GREATER BODY FAT LOSS 

IMF AS A FORM OF CALORIE CYCLING & NUTRITIONAL PERIODIZATION

HOW TO SYNCHRONIZE CALORIE & CARBOHYDRATE INTAKE WITH TRAINING DEMANDS

RFL DAYS VS MAINTENANCE DAYS

BALANCING AGGRESSIVE FAT LOSS WITH TRAINING PERFORMANCE, RECOVERY & MUSCLE RETENTION

HOW IMF CAN BE MODIFIED FOR STRENGTH, ENDURANCE & PERFORMANCE ATHLETES

HOW TO CREATE THE LARGEST PRODUCTIVE DEFICIT WITHOUT COMPROMISING THE ATHLETE’S PRIMARY PERFORMANCE GOAL


The biggest theme throughout this episode is that the goal isn’t simply to create the largest calorie deficit possible.


The goal is to intelligently distribute that deficit in a way that allows us to achieve the desired rate of fat loss while preserving the things we don’t want to sacrifice in the process.


If you’re interested in fat loss, physique development, sports nutrition or understanding how to better periodize nutrition around training, this episode is for you.


WHERE TO CONNECT WITH ME:


Follow Brandon on IG:

https://www.instagram.com/brandondacruz_/


For Info on Brandon’s Coaching Services:

https://form.jotform.com/bdacruzfitness/coachinginquiry


Email:

Bdacruzfitness@gmail.com


LYLE’S NEWEST BOOKS: 


https://store.bodyrecomposition.com


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Hosted by Brandon DaCruz, Chasing Clarity: Health & Fitness Podcast cuts through the noise of an often overwhelming industry. Instead of quick fixes, Brandon and his co-host Jeff build conversations from a place of genuine partnership, tackling everything from meal planning and workout splits to the less-discussed mental hurdles of a fitness journey. Their dynamic feels more like a dialogue between friends who’ve been in the trenches, making complex topics in nutrition, training, and body composition feel accessible and actionable. What you’ll find here is a practical blend of solid information and real-world application, designed for anyone who wants to move past confusion and build sustainable habits. This isn't about rigid dogma; it's about finding what actually works for you. Tune into the podcast for honest discussions that aim to replace frustration with understanding, one episode at a time.
Author: Language: English Episodes: 50

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