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Evidence-based GLP-1 & peptide discussion since 2023
ForumsPublic SquareInjection site rotation systematic review — looking for input

Injection site rotation systematic review — looking for input

tyler_CSCS Fri, Apr 25, 2025 at 8:12 AM 17 replies 1,523 viewsPage 1 of 4
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tyler_CSCS
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Jun 2024
Phoenix, AZ
Apr 25, 2025 at 9:37 AM#1

I inject my Wegovy every Thursday morning and I've noticed a definite pattern in how I feel throughout the week:

  • Thursday (injection day): Fine for a few hours, then nausea and fatigue kick in by evening
  • Friday: Worst day. Nauseous, exhausted, zero appetite, zero energy
  • Saturday: Starting to feel better, still a bit off
  • Sunday-Wednesday: Feel great, good energy, appetite somewhat normal

Currently I'm trying to work out 3x/week and struggling with scheduling. If I train Thursday I feel fine but the post-workout recovery gets tanked by the injection side effects. If I skip Fri/Sat I lose 2 potential training days.

How do you all schedule your workouts around injections? Does timing actually affect results or am I overthinking this?

28 22sean_dublin, hannah_MT, Dr.SportsMedIN and 25 others
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JakeSmashed95
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Aug 2024
Arkansas
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Apr 25, 2025 at 9:54 AM#2

You're not overthinking it at all — this is one of the most common scheduling challenges my GLP-1 clients face. The side effect pattern you describe is extremely typical.

My general recommendation: schedule your key training sessions on your "good" days and use injection/recovery days for light activity or rest.

For your Thursday injection schedule, I'd suggest:

  • Sunday: Resistance Training Day A (you're 3 days post-injection, feeling good)
  • Tuesday: Resistance Training Day B (5 days post, peak energy for most people)
  • Wednesday OR Thursday morning: Resistance Training Day C (pre-injection or early injection day)
  • Friday: Complete rest or gentle walking only
  • Saturday: Light activity — easy walk, stretching, yoga

The "golden window" for most weekly injectors seems to be days 3-6 post-injection. That's when side effects have subsided but the medication is still providing good appetite control.

23 1kevin_tulsa, Dr.PainCLE, mike_mealprep and 20 others
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anders_CPH
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Feb 2024
Copenhagen, DK
Apr 25, 2025 at 10:11 AM#3

I switched my injection day specifically to optimize my training schedule and it made a huge difference. I inject Monday evenings and train Wednesday, Friday, and Saturday. By Wednesday I'm through the worst of the side effects and have three good training days in a row.

If your doctor is flexible on which day you inject, it's worth considering which day gives you the best training window. Obviously keep it the same day each week — just pick the day strategically.

49 7AussieAnna, BethLabQueen, ChrisMacros and 46 others
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AttorneyGrant
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Apr 2024
Washington, DC
Apr 25, 2025 at 10:28 AM#4

That schedule makes so much sense. I've been stubbornly trying to do Mon/Wed/Fri and Fridays are just absolute wastes — I show up to the gym and can barely move any weight.

Interesting idea about switching injection days. I picked Thursday randomly when I started. Might ask my doctor about moving to Friday evening so my worst days (Sat/Sun) are when I'd naturally rest anyway, and I get Mon-Thu as training days.

Last edited: Apr 25, 2025 at 11:28 AM
32 5pat_auckland, Dr.GastroMayo, JakeBK_lifts and 29 others
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jason_sac26
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Jan 2026
Sacramento, CA
Apr 25, 2025 at 10:45 AM#5

I inject Friday nights for exactly the reason Sally just described. Worst days are Saturday and Sunday when I'm at home anyway. Monday through Thursday are my training days and I feel great for all of them. Game changer.

One tip — inject AFTER dinner on your injection day, not before. Eating a solid meal beforehand seems to reduce the nausea for me. Taking it on an empty stomach is brutal.

21 18Dr.PulmRoch, maya_sedona, stefan_berlin and 18 others
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