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Injuries + lifting while on GLP-1s?

12 replies7 peopleJul 10, 2026☆ Follow
Summary

Do GLP-1 drugs increase tendon or muscle injuries during weight training?

Several users report more tendon tears, pulls, and active pain while lifting on tirzepatide even though routines stayed the same. Others note reduced chronic inflammation but still experience occasional strains, and some attribute problems to rapid weight loss, changed body mechanics, or pushing too hard. The original poster distinguishes lowered background pain from heightened pain during actual exercise.

What this discussion establishesWhere people disagree

Some observe overall less inflammation and pain on GLP-1s while others report clearly elevated injury rates and sensitivity during workouts.

Still open

Whether the drug itself directly raises injury risk or if factors like age, calorie deficit, or training intensity explain the difference.

Nothing here is advice.

12 replies · 7 people
ClearMeadow64archiveopening postJul 10

Hi, wondering if others have run into more injuries or tendonitis on GLP-1 meds. I've lifted on and off for years with a steady routine. Since starting tirzepatide I've had far more tendon tears and active pain than ever before, even though the exercises haven't changed. My mom started the same meds and got into the gym too, and she developed tendonitis as well. I focus on functional strength with heavier loads and suspect the same sensitivity shift that reduces appetite might also heighten pain awareness, leading to more injuries. Anyone else noticing this, especially the extra pain while training?

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GreyAlder96archiveJul 10

A lot of people report less inflammation and less chronic pain. That said, I've had a few minor muscle pulls or tears lately even without big calorie cuts. Last week I tried a sprint and pulled something in my ribs. Maybe I'm just getting older though.

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WarmCompass44archiveJul 10

Could be a few things. Losing weight often means losing strength too, so keeping the same loads might overload joints. Nutrient gaps from the reduced eating caused by these meds are another possibility.

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AmberCinder18archiveJul 10

Not a physio, but it makes sense that big rapid weight loss changes how your body moves. Hauling around 300 pounds uses different muscles and angles than moving 125 pounds. You might still be using the old movement patterns from when you were heavier, and your muscles haven't adjusted yet. Just a theory.

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WarmSparrow60archiveJul 10

Early on I pushed weights harder to ride the weight-loss wave and ended up tearing my labrum and rotator cuff on incline bench with 80 lb dumbbells. After two MRIs, a couple months on a recovery protocol, and plenty of self-directed PT I got back to about 95 percent. It took four months total. Now I'm back training but skip all overhead and bench work, emphasize pulls over pushes, and my legs got pretty small during the weight drop. I can do roughly 85 percent of what I need. Elbows tucked helps, and resting more is key. Trying to regain everything too fast is risky.

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SlowLedger31archiveJul 10

Tweaked my back on a lat pull last night, but otherwise I've had months of solid energy and stamina. Back to normal inside a day.

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ClearMeadow64archiveJul 10
↳ replying to @GreyAlder96

That's the interesting part for me. Chronic pain drops but active pain during use goes up. The drug makes you forget to eat, and it also makes you forget background injury pain. Yet when you actually eat, fullness hits hard, and the same seems true for exercise. Using the arm hard quickly reminds me the injury is there. Age is always a factor too.

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ClearMeadow64archiveJul 10
↳ replying to @WarmCompass44

Nutrient shortfalls crossed my mind. I've lost weight before without this many injuries, and usually the injuries came when I was getting stronger and adding weight. Muscle memory is real too. A month back in the gym on my old body and I'm right back to heavy loads. One clear change on tirz is that injury pain feels much sharper. When I stop the med the sensitivity eases as hunger comes back.

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ClearMeadow64archiveJul 10
↳ replying to @AmberCinder18

I still carry enough weight that the mechanics shift probably isn't the main issue yet. If I were down to a six-pack and still getting hurt I'd be more convinced.

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ClearMeadow64archiveJul 10
↳ replying to @WarmSparrow60

Sorry that happened. Getting to the gym is hard enough without dealing with setbacks like that. Glad you're improving after four months. I have a SLAP tear just above the labrum. It doesn't limit function much but the pain in the first set can be pretty sharp. Did the recovery protocol help?

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ClearMeadow64archiveJul 10
↳ replying to @SlowLedger31

Nice that you bounced back fast. My back tweaks are usually just from how I slept, but yeah, got to watch those.

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WarmSparrow60archiveJul 10
↳ replying to @ClearMeadow64

It helped some. Maybe 40 percent from the protocol and 60 percent from the PT work. I'd use it again if needed. This was my worst self-inflicted injury and it was pretty humbling.

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BrightKettle28archiveJul 11
↳ replying to @WarmSparrow60

Leg day? What's that?

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