From the other side of the consultation, briefly.

Back pain as a lean mass side effect: not from the medication itself, but from rapid body composition changes. Losing 43 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.

NurseKim_ATL said:

Back pain as a lean mass side effect: not from the medication itself, but from rapid body composition changes.

Bone density monitoring on lean mass: DEXA bone density at baseline and month 12.

Lumbar spine T-score: -0.8 → -0.6 (stable to slightly improved)
Femoral neck T-score: -0.13 → -0.7 (stable)

No significant bone loss despite 60 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.

NurseKim_ATL said:

Back pain as a lean mass side effect: not from the medication itself, but from rapid body composition changes.

Physical therapist weighing in on lean mass. I work with bariatric and metabolic patients daily.

The resistance training evidence is critical here:

The Lundgren 2024 JAMA paper[1] showed that structured resistance training preserved 73% more lean mass in GLP-1 patients vs medication alone. When discussing lean mass, we MUST include the exercise component.

My minimum prescription: 3x/week compound movements (squat, deadlift, press, row), progressive overload, 7-10K steps/day, and 1.2-1.6g protein/kg/day.

NurseKim_ATL said:

Back pain as a lean mass side effect: not from the medication itself, but from rapid body composition changes.

That reframing is the part I needed.

Moderator note: the sourcing question belongs in the vendor section and has been split out. Thread quality here is what the rules are for. Keep it up.