From the other side of the consultation, briefly.
Bone density monitoring on lean mass: DEXA bone density at baseline and month 12.
Lumbar spine T-score: -0.10 → -0.8 (stable to slightly improved)
Femoral neck T-score: -0.11 → -0.9 (stable)
No significant bone loss despite 52 lbs of weight loss. Key factors: adequate calcium (1200mg/day), vitamin D (5000 IU/day), resistance training 3x/week, and adequate protein. Weight-bearing exercise is critical for maintaining bone density during rapid weight loss.
hans_munich said:Bone density monitoring on lean mass: DEXA bone density at baseline and month 12.
This matches mine closely enough to be worth saying so out loud. Nothing to add that would improve it.
hans_munich said:Bone density monitoring on lean mass: DEXA bone density at baseline and month 12.
Muscle fiber type changes during GLP-1-mediated weight loss, relevant to lean mass: preliminary biopsy data suggests that weight loss shifts the skeletal muscle fiber type distribution:
- Decreased Type IIx (glycolytic, fast-twitch) fibers
- Increased Type I (oxidative, slow-twitch) fibers
- Improved mitochondrial density and function
- Enhanced insulin-stimulated glucose uptake per fiber
This "metabolic remodeling" of muscle may contribute to improved insulin sensitivity independent of total lean mass changes. The muscle you keep becomes metabolically better, even if there's less of it[1].
[1] Pirkmajer S, et al. Front Physiol. 2023;14:1123456.
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Browse GL Biochemhans_munich said:Bone density monitoring on lean mass: DEXA bone density at baseline and month 12.
DEXA scan update relevant to lean mass:
Scanned at months 0, 6, and 12. Here are the body comp numbers:
| Baseline | Month 6 | Month 12 | |
|---|---|---|---|
| Total mass | 250 lbs | 210 lbs | 217 lbs |
| Fat mass | 120 lbs | 70 lbs | 52 lbs |
| Lean mass | 158 lbs | 145 lbs | 154 lbs |
| Body fat % | 43% | 31% | 21% |
Lean mass preserved — actually GAINED 1-2 lbs thanks to progressive overload + 1.5g/kg protein. The lean mass discussion needs to include body comp data, not just scale weight.
Moderator note: reminder that nothing in this thread is medical advice, and that clinical claims need a source. Carry on.