Body Recomp After 40: Losing Fat Without Losing Muscle

Fat loss becomes more complex after 40. The approach that worked at 25 may cost you lean mass now without the right regimen in place.

Maves offers the Body Recomp Protocol, a GLP-1 paired with Sermorelin, to support fat loss while protecting lean mass. Here's what changes after 40, and how the protocol works with it.

What Changes After 40

Several things shift at once, which is why the effect compounds:

• Lean mass declines gradually without resistance training to maintain it
• Recovery capacity decreases, so the same training load takes longer to absorb
• Growth hormone signalling becomes less consistent, and it's closely tied to deep sleep
• Sleep quality often deteriorates alongside it
• Testosterone declines gradually in men

None of this makes body recomposition unachievable. It reduces the margin for error.

Making It Easier After 40

The shifts above make fat loss more demanding after 40. A structured protocol addresses the two factors that most often limit progress.

Body Recomp targets both. The GLP-1 supports appetite regulation, which reduces how much a sustained deficit depends on willpower. Sermorelin supports the body's own growth hormone release, the process driving overnight repair, so training capacity holds up well enough to preserve lean mass.

Why This Matters

Several physiological changes after 40 shape what an effective approach looks like.

• Muscle becomes less responsive to protein with age, a phenomenon known as anabolic resistance. Older muscle requires a higher protein dose per meal to trigger the same muscle protein synthesis response, which is why intake targets increase rather than decrease.
• Sleep quality carries measurable hormonal consequences. Sleep restriction has been shown to reduce circulating testosterone in healthy men, and testosterone contributes to the maintenance of lean mass. Recovery is a direct input to body composition rather than a secondary concern.
• Lean mass declines by roughly 3 to 8 percent per decade after 30 without resistance training, but the response to training itself holds up. Progressive resistance training remains effective well into later decades, including in previously untrained adults.

Together these explain why the same approach produces a different result at 45 than it did at 25.

What You Still Need to Do

The protocol supports appetite regulation and recovery. The remaining inputs are yours to manage:

• A moderate deficit rather than an aggressive one
• Higher protein intake, distributed across the day
• Consistent resistance training
• Sufficient sleep to support recovery

Resistance training provides the stimulus for preserving lean mass, and protein provides the substrate. After 40, both carry more weight than they used to.

FAQ

Why does sleep matter more for this after 40?

Growth hormone release peaks during deep sleep and drives tissue repair. As that signalling becomes less consistent with age, recovery slows, and recovery is what lets you keep training hard enough to protect muscle while you're eating less.

Do I need to train differently than I used to?

Resistance training matters more than it did, and cardio matters less as your primary tool. The bigger shift is treating recovery as part of the programme rather than what happens between sessions.

What This Means for You

Maves protocols are built around men's goals. Each one pairs treatments that work on different systems, with clinician oversight throughout.

Next steps:

• Review our protocols
• Select the one built for your goal
• Complete your patient onboarding

Start your application today!

This article is for informational purposes only and does not constitute medical advice. The information contained herein is not a substitute for professional medical advice. Always talk to your doctor about the risks and benefits of any treatment.