LYLE MCDONALD: HOW BIG OF A CALORIE SURPLUS DO YOU NEED TO BUILD MUSCLE? HOW TO MAXIMIZE MUSCLE GAIN & MINIMIZE FAT GAIN USING RFL DAYS | EP. 236

LYLE MCDONALD: HOW BIG OF A CALORIE SURPLUS DO YOU NEED TO BUILD MUSCLE? HOW TO MAXIMIZE MUSCLE GAIN & MINIMIZE FAT GAIN USING RFL DAYS | EP. 236

Author: Brandon DaCruz August 26, 2026 Duration: 1:28:28

How much do you actually need to eat above maintenance to maximize muscle growth?


And once you’re eating enough to support hypertrophy, does pushing calories even higher build more muscle, or simply make you gain body fat faster?


In Part 2 of my Intermittent Modified Fasting series, I’m joined once again by Lyle McDonald to move beyond using IMF strictly as a fat-loss strategy and explore how some of these concepts can be applied across different phases of physique development.


We start with one of the most debated topics in evidence-based bodybuilding right now: how large of a calorie surplus is actually necessary to maximize muscle growth?


Lyle and I break down the research comparing different surplus sizes, realistic rates of muscle gain across different levels of training advancement, the estimated energetic cost of synthesizing new muscle tissue and why simply eating more doesn’t allow you to force-feed muscle growth.


From there, we take the IMF framework in a direction I found particularly interesting:


Could strategically placed Rapid Fat Loss days be incorporated into a Lean Building Phase to help control fat gain without compromising hypertrophy?


We discuss using a 6:1 approach where the majority of the week supports muscle growth while one strategically placed RFL day helps reduce the cumulative weekly surplus, how this compares with simply running periodic mini-cuts, and which individuals might actually benefit from this strategy.


Finally, we shift back into fat loss and revisit diet breaks. For years, diet breaks were promoted as a way to “reset” metabolism and reverse the physiological adaptations to dieting. But as more research has accumulated, that explanation has become increasingly difficult to defend.


That doesn’t mean diet breaks are useless. Instead, their biggest benefits may come from improving hunger management, training performance, psychological fatigue, adherence and giving someone an opportunity to actually practice eating at maintenance.


IN THIS EPISODE:

HOW LARGE OF A CALORIE SURPLUS IS ACTUALLY NECESSARY FOR MUSCLE GROWTH?

WHY YOU CANNOT FORCE-FEED MUSCLE GROWTH

HOW MUCH MUSCLE CAN BEGINNER, INTERMEDIATE & ADVANCED TRAINEES REALISTICALLY GAIN?

WHAT THE RESEARCH SHOWS ABOUT SMALL VS. LARGE CALORIE SURPLUSES

WHY FASTER WEIGHT GAIN OFTEN MEANS MORE FAT GAIN, NOT MORE MUSCLE

HOW TO DETERMINE WHETHER YOUR CALORIE SURPLUS IS ACTUALLY PRODUCTIVE

LEAN BUILDING & MINIMIZING UNNECESSARY FAT GAIN

USING RAPID FAT LOSS DAYS DURING A LEAN-BUILDING PHASE

THE POTENTIAL 6:1 APPROACH: SIX BUILDING DAYS + ONE RFL DAY

RFL DAYS VS. PERIODIC MINI-CUTS

BODY RECOMPOSITION & WHO IS MOST LIKELY TO EXPERIENCE IT

DIET BREAKS: PHYSIOLOGICAL VS. PSYCHOLOGICAL BENEFITS

HOW DIET BREAKS MAY IMPROVE HUNGER, TRAINING PERFORMANCE & ADHERENCE

WHY PRACTICING MAINTENANCE MAY BE ONE OF THE MOST UNDERRATED BENEFITS OF A DIET BREAK


The major theme running through this episode is that more is not automatically better.


More calories don’t necessarily mean more muscle. More restriction doesn’t necessarily mean a better diet. And more complexity doesn’t necessarily mean a better strategy.


The goal is understanding which nutritional tool fits the individual, their physiology, their psychology and the phase they’re currently in.


If your goal is to build more muscle while minimizing unnecessary fat gain, or to better understand how to periodize periods of surplus, maintenance and energy restriction across a long-term physique transformation, 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


SAVE 20% BY USING CODE: larrywon



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

Chasing Clarity: Health & Fitness Podcast
Podcast Episodes
ERIC HELMS: IS BULKING DEAD & MAINGAINING IN? | EP. 209 [not-audio_url] [/not-audio_url]

Duration: 1:26:52
A lot of people still think muscle gain is simple: eat more to gain more muscle.But the real question is: do you actually need an energy surplus to maximize hypertrophy or do you just need to be out of a deficit, trainin…
LEAN BUILDING BLUEPRINT: LEAN GAINS SERIES PART 2 | EP. 208 [not-audio_url] [/not-audio_url]

Duration: 25:56
Most people keep trying to diet their way into a better physique.They chase scale weight loss.They bounce from deficit to deficit.And they never build the foundation of muscle that actually creates the look they’re after…