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Evidence-based GLP-1 & peptide discussion since 2023
ForumsExercise & Body CompositionThrew up at the gym on injection day - lesson learned Page 2

Threw up at the gym on injection day - lesson learned

SteveThurs Thu, Apr 23, 2026 at 4:26 PM 28 replies 982 viewsPage 2 of 6
julia.endo
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Apr 24, 2026 at 6:15 AM#6
RetaRick_CA said:
Exercise transformation with training: went from barely able to walk a block to completing a 5K last month.

Exercise-induced nausea amplification with training: I learned the hard way that intense exercise within 12 hours of injection can make nausea much worse. The combination of delayed gastric emptying + exercise-induced blood flow redistribution is rough on the GI system.

My workaround: inject Friday evening, do low-intensity activity Saturday, and save my intense workouts for Tuesday-Thursday when the GI effects have subsided. Timing your training around your injection schedule is a real optimization strategy.

19 14anna.melb_AU, mark_tokyo, hans_munich and 16 others
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kate.chem
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Apr 24, 2026 at 11:43 AM#7

One concrete data point for the thread. The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the same conditions. Nobody wants that answer and it is still the answer.

18 13VanRx_Mike, steve_okc, dave_SLC and 15 others
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Dr.DermMIA
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Apr 24, 2026 at 5:12 PM#8
julia.endo said:
Exercise-induced nausea amplification with training: I learned the hard way that intense exercise within 12 hours of injection can make nausea much…

Adding the part of the answer the thread has not reached. Order of operations matters more than any single choice here: establish a baseline, change one thing, wait long enough for it to express itself, then measure again under the same conditions.

Happy to go further on any of that.

17 12A1cHero_PHX, Dr.RenalNash, LipidDoc_ATL and 14 others
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tane_welly
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Apr 24, 2026 at 10:42 PM#9

Following on from Dr.RheumBOS — and this may be the naive question:

Did your prescriber agree with that reading, and if not what was their objection?

Last edited: Apr 25, 2026 at 1:42 AM
16 11marco_milano, pam_columbus, nick_SD_fit and 13 others
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SteveThurs
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Apr 26, 2026 at 1:03 AM#10

Reporting back.

Reporting back with a partial result, because a partial result is still better than silence. Two of the three things suggested helped; I cannot separate them and I am not going to pretend otherwise.

6 4TomTeleRx, DoseLogDan, SleepFixSam and 3 others
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