Preserve muscle mass, strength, and physical capability as you age. A complete system: labs, supplement stack, wearable tracking, and a 90-day retest plan. For men and women 35–55+.
Adults 35–55 (men and women) who want to preserve or rebuild muscle mass, maintain strength, and slow the physical decline that begins in the fourth decade. You train, or used to. You are noticing the gap between what your body can do and what you want it to do.
This protocol is not for competitive athletes. It is for capable people who want to stay capable — longer.
Adults lose 3–8% of muscle mass per decade after 30, accelerating after 60.[1] Most people respond by buying protein or creatine without measuring whether they need more of either. Taken without a baseline, you have no idea if anything is working.
This protocol fixes the sequence: measure first, then optimize, then retest.
Hormone panel + metabolic markers
DEXA scan if budget allows
Creatine, protein, D3+K2, omega-3
Wearable for sleep + HRV
Compare labs, performance, body comp
The exact labs, wearables, and metrics to establish your health baseline — organized by cardiometabolic, recovery, body composition, performance, and longevity.
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Answer 6 questions. Get a personalized measurement path, protocol, and supplement stack.
Before changing anything, get a data point. You cannot track progress without a starting measurement.
Recommended platforms: Function Health vs InsideTracker comparison →
A recovery wearable turns sleep and HRV into actionable data. Both metrics directly predict whether your body is adapting to training stress. HRV suppressed for 3+ days = back off training intensity.
→ Oura Ring vs WHOOP: which to choose for recovery tracking
Rerun the same labs at 90 days. Compare: hormone trends, body composition (if DEXA available), performance markers (lift numbers, grip strength, walking pace). The data tells you whether the protocol is working — and whether to adjust.
Compare trends, not just absolute values
Lean mass change is more informative than scale weight
Record working weight × reps on key lifts
30-day rolling average: improving, stable, or declining?
The Stack Analyzer tailors this protocol to your age, sex, budget, and current tools — and adds the specific measurements and supplement tiers right for you.
Supplements should come after the baseline: labs, sleep, training, nutrition, and symptoms. For the supplements CreusLife recommends most often, Momentous is now the preferred partner because it offers focused products for performance, sleep, recovery, and longevity.
Start with the Momentous main store if you want to choose from the full lineup.
Use recovery tools to support training consistency, not to compensate for poor sleep, excessive stress, or under-fueling.
These are practical, low-complexity tools for improving range of motion, tissue tolerance, and daily movement quality.