How to Keep Training on GLP-1: A CrossFit Guide for Austin Athletes

Somewhere between five and ten percent of the adults walking into Austin gyms right now are on a GLP-1 medication. Some of them will tell you. Most of them will not. If you are one of them, or you are thinking about becoming one, this article is for you, because almost everything written about these drugs focuses on the scale and almost nothing useful has been written about what happens to your training.

Let us get one thing out of the way first. We are not going to tell you whether you should or should not take semaglutide, tirzepatide, or whatever comes next. That conversation belongs between you and your doctor. What we can tell you, because we see it on the gym floor every week, is what these medications do to people who train, what they do to people who do not, and how to set yourself up so that the weight you lose is the weight you actually want to lose.

What GLP-1 Medications Actually Do

GLP-1 receptor agonists, the class that includes Ozempic, Wegovy, Mounjaro, and Zepbound, mimic a hormone your gut releases after eating. The practical effects are that you feel full sooner, you stay full longer, and the constant background chatter about food that many people live with goes quiet. Food noise, patients call it. For a lot of people its absence is the first silence they have had in decades.

The results in clinical trials are real. Semaglutide produced roughly 15 percent total body weight loss over about a year and a half in its major trial. Tirzepatide pushed past 20 percent in some groups. Numbers like that used to require bariatric surgery.

Here is what the headline numbers do not tell you: your body does not particularly care which tissue it burns to produce that loss. Left to its own devices, in a large calorie deficit, it will happily take muscle along with fat.

The Muscle Problem Nobody Warned You About

In studies that measured body composition rather than just body weight, somewhere between a quarter and 40 percent of the weight lost on GLP-1 medications came from lean mass. Not fat. Muscle, and the tissue that carries it.

Think about what that means in practice. A person who loses 40 pounds might be giving back 10 to 15 pounds of muscle. That is muscle that took years to build, muscle that keeps your metabolism running, holds your joints together, gets you off the floor when you are 70, and determines whether you look strong or depleted at the end of the process.

Muscle is also your insurance policy for what comes after. Many people do not stay on these medications forever. Cost, supply, side effects, or simply reaching a goal all end prescriptions. When the appetite comes back, and it does come back, the people who kept their muscle regain far less fat than the people who let it go. Your resting metabolism is largely a function of how much lean tissue you carry. Lose the muscle and you come off the medication with a slower engine than you started with, which is exactly the setup for the rebound everyone fears.

This is why the fitness industry has spent the past two years quietly reorganizing itself around one phrase: muscle preservation. The gyms and coaches paying attention are no longer treating GLP-1 users as a curiosity. They are treating them as athletes with a specific, solvable problem.

Why Strength Training Is Not Optional

The research on this point is unusually clear. Resistance training during rapid weight loss dramatically shifts the ratio of fat to muscle lost. Combine progressive strength work with adequate protein and the lean mass losses shrink from catastrophic to trivial. Skip both and you are essentially running a muscle-wasting protocol with a prescription label on it.

Notice the word progressive. Walking is wonderful and you should do it, but walking does not signal your body to keep muscle. Neither do light dumbbell circuits that never get harder. Your body keeps tissue it has a reason to keep. Lifting something heavy enough to be challenging, a few times a week, with a little more load or a few more reps over time, is that reason. There is no substitute, and no supplement stack replaces it.

Two to four strength sessions per week is the range that works for most people. That is not a boutique protocol for the medicated. It is the same dose of strength work that benefits every adult, which is convenient, because it means you do not need a special GLP-1 program. You need a good gym.

How to Train When Your Appetite Is Gone

The honest part: training on these medications is not always smooth, especially in the first months and in the week after each dose increase. You are running on fewer calories than your body is used to. Some days you will feel flat. Nausea shows up uninvited. The trick is to adjust the plan rather than abandon it.

Scale the intensity, not the attendance. Showing up and lifting at 70 percent on a rough day beats skipping the session entirely, and it is far better than the boom-and-bust pattern of training hard for a week and disappearing for two. If your gym has real coaches, tell them what you are working with. Any coach worth their title can take the day's workout down a notch for you without making it a production. This is, frankly, where group training with actual coaching earns its money over a big-box membership: someone is watching, someone adjusts, and nobody lets you quietly vanish for a month.

Expect your conditioning to feel harder before it feels easier. Less fuel in the tank means the engine sputters at high intensity. That resolves as your body adapts, but give it time and do not treat a bad workout in week three as evidence that training does not work for you.

And drink water. GLP-1 medications blunt thirst for many people right alongside hunger, and an Austin summer does not care about your prescription. If you are training in a warehouse gym in July, which around here is most of us, salt and fluids are part of the program.

Protein: The Hard Part

Here is the cruel joke of these medications: at the exact moment your body most needs protein to hold onto muscle, your interest in eating drops through the floor. Hitting protein targets is the single hardest practical problem GLP-1 users face, and it deserves more attention than the injections themselves.

The target worth aiming for sits around 0.7 to 1 gram per pound of goal body weight per day. For most adults that lands somewhere between 100 and 160 grams. On a suppressed appetite, that number can feel absurd. A few tactics make it achievable.

Eat protein first, always. If the fullness wall is coming down after eight bites, make sure those eight bites were chicken and not rice. Spread it across three or four smaller feedings rather than betting everything on a dinner you may not finish. Use liquid protein without shame, because a shake goes down on days when a chicken breast looks like homework. And treat protein like training: something you log and hit on purpose, not something you hope happens.

If you do nothing else from this entire article, do this: lift weights and eat your protein. Those two habits are the difference between coming out of this process lean and strong or small and soft.

Timing Training Around Your Injection

Most people inject weekly, and most people have a pattern: a day or two after the shot where nausea and fatigue peak, then a clearer stretch. Learn your own pattern, because it is remarkably consistent, and place your hardest sessions in the clear days. Put your heaviest lifting as far from the injection as your week allows, keep something easy, a walk, mobility work, light technique practice, in the rough window, and stop trying to have your best workout ever fourteen hours after a dose increase.

None of this is complicated. It is the same logic every experienced athlete applies to sleep, stress, and travel. The medication is simply one more variable to plan around, not a reason to stop planning.

What This Looks Like in a CrossFit Gym

People on GLP-1s sometimes assume a CrossFit gym is the last place they belong, picturing some televised fire-breather workout. The reality of a well-run affiliate is closer to the opposite: it is one of the few environments purpose-built for exactly what these medications demand.

Every class contains strength work programmed progressively, which is the muscle-preservation piece handled without you designing anything. Every movement scales, so the version of the workout you do on a low-fuel day is decided in thirty seconds of conversation with a coach, not by you alone guessing in a corner of a commercial gym. Your lifts are tracked, which matters more than usual here, because your numbers holding steady while your body weight drops is the proof, in writing, that you are losing fat and keeping muscle. Watching your deadlift stay put while 30 pounds disappear is one of the most reassuring pieces of data a person on these medications can own.

Then there is the part that does not fit in a spreadsheet. Losing a lot of weight is disorienting. Clothes change, reflections change, the comments start. Doing that surrounded by people who know your name, notice your absence, and cheer your progress is a different experience from doing it alone with a set of earbuds. The data on long-term fitness results keeps pointing at the same unglamorous driver, and it is not motivation. It is accountability. Community is the delivery mechanism.

If You Are Starting From Zero

Maybe you have never lifted a barbell. Good news: you are the person with the most to gain. Beginners build muscle faster than anyone, and that newbie window partially offsets the medication's pull in the other direction. Starting strength training in month one of a GLP-1 prescription is close to ideal timing, not something to postpone until you feel fitter. You do not get in shape to start training. Training is how you get in shape.

Start with two or three coached sessions a week. Tell the coach about the medication, the same way you would mention a shoulder issue. Progress will come faster than you expect, and it compounds.

Training on GLP-1 in Austin

If you are in North Austin and working through any of this, come train with us at FitHub CrossFit REP on Metric Boulevard. Tell the coach what you are taking. You will not be the first that day, let alone the first that year. We will scale the workout to the day you are actually having, keep your lifts on record so you can watch the right kind of weight leave, and introduce you to a room full of people who care how you are doing. Book a free intro or drop in for a class, and if you join, the drop-in fee counts toward your membership.

The medication handles the appetite. The barbell and the protein handle everything the medication cannot. You need all of it, and the second part is the part you control.

This article is general information, not medical advice. Decisions about GLP-1 medications belong with your physician.