VendorMark said:There is also a quality change that the scan cannot see.
Thank you — that is the clearest version of this I have read, and I have read a lot of them. Taking it to my next appointment.
Adding the clinical framing, because it changes how the question reads.
Back pain as a lean mass side effect: not from the medication itself, but from rapid body composition changes. Losing 48 lbs shifts your center of gravity and your core muscles need time to adjust.
Physical therapy has been essential. Core strengthening exercises (planks, dead bugs, bird dogs) daily for 10 minutes have eliminated my lower back pain. Your body is literally relearning how to carry itself.
PharmD_Rodriguez said:Regarding lean mass: I accidentally injected my dose intramuscularly instead of subcutaneously last week (went in at wrong angle, too deep).
Sharing my comprehensive lab data relevant to lean mass:
| Biomarker | Baseline | Month 3 | Month 6 | Month 9 |
|---|---|---|---|---|
| Weight (lbs) | 253 | 248 | 223 | 198 |
| A1C (%) | 7.8 | 6.3 | 5.8 | 5.5 |
| hsCRP (mg/L) | 8.0 | 4.0 | 2.5 | 0.9 |
| Triglycerides | 233 | 143 | 113 | 103 |
Protocol: Tirzepatide 10mg/wk, resistance training 5x/week, protein 1.5g/kg/day.
The improvements in lean mass are clearly reflected in these numbers. The inflammatory marker reduction (hsCRP) is particularly striking.
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Browse GL Biochemhannah_MT said:The intervention that works is boring and well evidenced: resistance training two to three times a week at a genuine effort, protein at 1.4 to 2.0…
hannah_MT said:...the muscle loss concern with lean mass...
This is a legitimate and well-studied concern. Let me put some numbers on it:
In STEP 1, approximately 39% of weight lost was lean mass. However, the Lundgren 2024 study showed that structured resistance training reduced this to ~25% lean mass loss.
Context matters: at BMI 35+, you're carrying excess lean mass to support the extra weight. Losing some lean mass is expected and not inherently harmful if you maintain adequate muscle function through exercise.
The solution isn't avoiding the medication — it's combining it with proper exercise and protein intake.