Short answer: if you have the means and weight loss is your goal, a GLP-1 will almost certainly work, and there is no shame in using it. But the research shows a real cost hiding under the number on the scale: lean muscle and bone density loss. The fix is simple. Pair the medication with strength training two to three days a week.
I own two CrossFit gyms in Ventura County, and the question I get asked more than almost any other right now is some version of: "Coach, should I be taking Ozempic?"
Here's my full answer.
A GLP-1 is a tool, not a moral choice
A GLP-1 belongs in the same category as a Garmin watch, an Oura ring, intermittent fasting, or CrossFit itself. They're all tools. A tool is only good or bad relative to the outcome you're chasing.
For most people entering the health and fitness space, the outcome is losing weight. And on that measure, GLP-1s deliver. The effort is near zero and the result is near guaranteed. When something offers a nearly guaranteed outcome for nearly zero effort, it becomes extremely valuable, and a lot of people will reasonably choose it.
Plenty of coaches in my world will tell you that's cheating. I won't. If a GLP-1 moves you toward the healthiest version of yourself, more power to you.
The catch: you're not just losing fat
Here's what the scale doesn't show you.
In a body-composition sub-study of the STEP 1 semaglutide trial, roughly 39 percent of the total weight participants lost was lean mass. Muscle, not fat.
Bone is at risk too. A randomized trial from Denmark published in JAMA Network Open found that people who took a GLP-1 without exercising lost bone mineral density at the hip and spine over a year. The group that combined the medication with exercise lost the same weight or more and kept their bone density.
Why does this matter? Because skeletal muscle mass is one of your best hedges against chronic illness, injury, and losing your independence later in life. Losing a big chunk of it while the scale goes down isn't health. It's just smaller.
What to do if you're taking a GLP-1
Do not take a GLP-1 without resistance training. In my opinion, taking one with zero strength training is one of the worst moves in fitness right now.
The good news: the prescription is light. You don't need five days a week or max-out lifting. You need consistent resistance training two to three days a week. Consistency beats intensity here, the same way steady monthly deposits beat a single lump sum in your retirement account.
Why I recommend CrossFit for GLP-1 users
Two reasons, and neither is the workouts themselves.
Community. A good CrossFit gym runs on what I call communal suffering and communal success. When your gym wins when you win, you keep showing up on the hard weeks. Consistency is the entire game.
Education. In a CrossFit gym you're constantly learning: how to eat better, sleep better, recover better. You get challenged to grow inside the gym, and it spills into the rest of your life.
A real example
One of our members, I'll call her Dana, came back to the gym after life circumstances outside her control led to weight gain. She was consistent in her training and tried multiple approaches, but the weight wasn't moving. She started a GLP-1 while continuing to train with us. She lost 30 pounds, her strength stayed, and her confidence and whole attitude about her health came back with it. Medication handled the appetite. Training protected the muscle. Community kept her consistent.
The bottom line
Take the tool if it fits your goal. Pair it with strength training two to three days a week. Protect your muscle and bone while the scale drops.
If you're on a GLP-1 and thinking about joining a gym but don't know where to start, our team will meet you exactly where you are, with zero shame. Start with our free Foundations Assessment at oxnardmvmnt.com/foundations-assessment, or message me directly on Instagram at @kolby_krysto.
Listen to this week's QuickCast episode for the full conversation.
Sources:
STEP 1 trial body composition analysis (semaglutide lean mass findings), summarized in Barbell Medicine's evidence review
Healthline coverage of the exercise and bone density findings
