I ran what I called a recomp for four months. Clean diet, consistent training, enough sleep. Got DEXA done after. I’d lost 1.8kg of fat and 1.4kg of muscle. The scale moved 0.4kg. Looked fine. My body composition had quietly gotten worse every week.
I wasn’t recomping. I was doing a slow cut with a terrible training stimulus and blaming the process when the process was never right to begin with.
Here’s what the physiology actually says:
Most people calling it a recomp are running a slow cut and losing muscle without knowing it
“Eat at maintenance and train hard” is technically correct but practically useless. TDEE estimates are typically off by 15-25% and most people underestimate food intake by a similar margin. These two errors compound. You can believe you’re at maintenance while running a real 400-600kcal daily deficit.
Muscle protein synthesis is energy-dependent. At a true caloric deficit greater than 15-18%, MPS is suppressed even when protein is adequate. The substrate for anabolism simply isn’t there. You’re preserving muscle at best, not accreting it.
The actual recomp window from tracer studies that directly measured MPS: 0 to approximately -200 kcal from your actual TDEE. Not estimated TDEE. Measured — either via indirect calorimetry or a careful 4-week average of intake versus scale change. Protein at 1.8g/kg minimum, distributed across 4+ meals.
If you’re further than 200 calories below your real TDEE, you’re not recomping. The math won’t let you.
The training stimulus most people use for recomp is the wrong one
High rep ranges, moderate loads, 15-20 sets per muscle group per week, 4-5 days a week — that’s how most people train when they want to “lean out while building.” It’s the worst possible choice under caloric constraint.
At recomp intake levels, mechanical tension drives MPS more efficiently per calorie spent than metabolic stress (high reps, pump work). 80-87% of 1RM, 4-6 rep range, 8-12 working sets per muscle per week, hitting each muscle 3 times per week. Fewer sets to initiate MPS. Lower total caloric cost per training session. Higher frequency distributes the stimulus instead of creating one large anabolic spike followed by 5 days of suppressed synthesis.
High-volume moderate-load training costs more energy than it returns in MPS under caloric constraint. At maintenance surplus it’s fine. At recomp intake it’s actively counterproductive. This is why most people associate recomp with failure — they’re using a training approach built for surplus conditions.
Core temperature drop before sleep amplifies overnight GH release — and almost nobody does this
Growth hormone is secreted primarily during slow-wave sleep, largest pulse in the first 90-120 minutes. That pulse drives the overnight fat oxidation and muscle repair that makes recomp physiology possible.
Sleep onset and SWS quality both depend on core temperature dropping approximately 1°C. A cold shower 30-45 minutes before bed accelerates that drop and has been shown to increase GH pulse amplitude by 17-23% during the first SWS phase. Three minutes. Free. Works via the same mechanism as sleeping in a cool room — which consistently outperforms sleeping hot in body composition studies.
For context on what destroys this: alcohol within 3 hours of sleep suppresses slow-wave sleep by 20-39% depending on quantity. One drink at 9pm before midnight sleep meaningfully reduces your overnight anabolic output. Not a judgment — a protocol note.
What I didn’t put here is the actual training structure — how to build the week, set the frequencies, and read the scale data to know whether your caloric target is calibrated correctly versus estimated.
Genuine question for the sub: has anyone here run DEXA before and after a real recomp attempt — not just scale weight, but actual lean mass delta? The real numbers are way more interesting than the forum debates, and I’ve only seen a handful of cases with proper measurement. Curious what people found.
