Research
Mixed
Combining GLP-1/GIP receptor agonists (semaglutide/tirzepatide) with structured resistance training (3-5 days/week) and high protein intake (1.6-2.3 g/kg fat-free mass/day) can preserve or increase lean soft tissue (LST) during significant weight loss, contrary to typical clinical trial outcomes.
If you are taking semaglutide or tirzepatide, do not rely on the medication alone to protect your muscles. You must lift weights 3-5 times a week and eat enough protein (aim for 1.6-2.3 grams per kilogram of your lean body mass). Without this, you risk losing significant muscle along with fat.
LimitedSupportsLOW confidence
These findings highlight the potential for some individuals to preserve or even increase lean soft tissue during treatment with semaglutide or tirzepatide alongside supportive lifestyle strategies.
Why this rating
Case series (n=3), no control group, self-reported adherence.
Source
Preservation of lean soft tissue during weight loss induced by GLP-1 and GLP-1/GIP receptor agonists: A case series
Grant M. Tinsley et al. · SAGE Open Medical Case Reports · 2025
DOI 10.1177/2050313x251388724
case_series · n=3Cited 4×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
Related findings · Mixed
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