New Data Shows GLP-1 Users Are Moving Less, Not More, Here's Why Strength Training Matters More Than the Scale

A wearable-tracker study of GLP-1 medication users found daily steps and workout minutes both dropped after starting the drugs, even as weight came off. For anyone in Las Vegas leaning on a GLP-1 while still trying to build real fitness, that gap is exactly where strength training earns its keep.

The scale goes down, but so does the movement

GLP-1 medications have become a fixture of conversation in every Vegas gym, whether someone's actually taking one, thinking about it, or coaching a client who is. The assumption a lot of people carry is simple: less body weight to haul around should mean more energy to move. A 2026 study presented at an Endocrine Society meeting says the opposite tends to happen.

Researchers pulled wearable-tracker data on close to 750 adults enrolled in the NIH's All of Us research program, most of them women in their early fifties, comparing activity levels before and after they started a GLP-1 drug. Average daily steps slid from just over five thousand to under forty-five hundred, and daily minutes of moderate-to-vigorous activity dropped from around half an hour to a little over twenty minutes. Weight was still coming off. Movement wasn't going up to match it.

Who dropped off the most, and why that matters at a gym level

The study's lead researcher flagged that men and people reporting joint or muscle pain saw the biggest declines in activity. That tracks with what a lot of coaches already notice: someone loses a meaningful amount of weight fast, some of that loss is muscle they weren't expecting to lose, and suddenly a workout that used to feel manageable feels harder, not easier, because they've got less strength carrying a lighter frame.

The researchers behind the data were blunt about the takeaway, noting there was no sign that shedding pounds on its own nudged people toward moving more, and arguing that structured activity has to be built into GLP-1 care rather than assumed to follow naturally. For a functional fitness gym, that's basically a description of the exact gap coached strength training is built to close.

Resistance training is the counterweight, not cardio alone

Separate clinical guidance echoes the same point from a different angle. Clinicians who treat GLP-1 patients generally steer them toward resistance work, bodyweight strength movements, and adequate protein specifically because rapid weight loss on these drugs can pull down muscle and bone density along with fat, and once that muscle is gone it's genuinely harder to rebuild than it was to lose.

None of that means cardio has no place. Walking, rowing, or a bike session still support cardiovascular health and help with the broader weight management picture. But the clinical consensus is that resistance training carries more of the load for preserving the muscle and function someone actually wants to keep, and that pairing it with enough daily protein gives the body something to hold onto while the scale keeps moving.

What this looks like inside a coached program

None of this requires reinventing how CrossFit or functional fitness training works. It's mostly a reminder to be deliberate with people who are on these medications rather than assuming their appetite and energy will behave like everyone else's in class. A few adjustments tend to help.

Coaches can lean on scalable loading, built-in recovery days, and a heavier emphasis on compound lifts and carries so a shrinking body still gets a real strength stimulus, even on days when energy is lower than usual.

• Prioritize two to three resistance sessions a week over adding more cardio volume
• Scale load intentionally rather than skipping strength work when energy dips
• Track how workouts feel week to week, not just what the scale shows
• Keep protein consistent at meals, since appetite naturally drops on these medications
• Flag joint or muscle pain to a coach early so programming can adjust before someone stops showing up

The takeaway for anyone training here on a GLP-1

None of this is a reason to avoid these medications or to feel behind if you're on one. It's a reason to be intentional, because the data is pretty clear that the movement side of the equation doesn't take care of itself just because the weight is coming off. A coached strength program is exactly the kind of structure that closes that gap.

If you're on a GLP-1 or considering one and want a training plan that scales with you instead of assuming you're starting from scratch, come train with us. We'll build the strength side around wherever you're starting, and leave the medical decisions to you and your doctor.

Building a Gym Routine Around a GLP-1 Medication

None of this is medical advice, and anyone on these medications should loop in their own doctor before changing training or diet. Inside that guardrail, here's how a functional fitness approach usually gets adapted for GLP-1 users.

1. Anchor the week in strength: Two to three resistance sessions weekly, built around squats, hinges, presses, and carries, do more for preserving muscle than adding extra cardio.
2. Scale, don't skip: Lighter loads or shorter workouts beat sitting a session out entirely when appetite or energy dips on a dosing week.
3. Treat protein like part of the program: Since GLP-1s blunt appetite, hitting protein targets often takes planning meals ahead rather than relying on hunger cues.
4. Watch joint and muscle discomfort: This group showed the steepest activity drop-offs in the research, so early coaching adjustments matter more than pushing through.
5. Keep some aerobic work in the mix: Rowing, biking, or brisk walking still supports heart health and pairs well with strength days rather than replacing them.
6. Track performance, not just weight: A logbook of reps, loads, and how sessions feel tells a more useful story than the scale alone during rapid weight loss.
7. Talk to your prescriber before big changes: Dose timing, hydration, and blood sugar all interact with training, so coordinate any real program shift with the doctor managing the medication.

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