GLP-1 Tips & Tricks

I've been a personal trainer in New York City for over 25 years. I've seen every diet trend, every supplement craze, and every piece of magical thinking that crosses the fitness industry. Thank god drug store 'fat burners' are no longer popular. GLP-1 medications like Ozempic, Wegovy, Mounjaro, and Zepbound are not a trend. They are genuinely effective tools for weight loss. But they are also genuinely misunderstood, and the way most people are using them is leaving a lot of results on the table.

Here are some tips and tricks for Glp-1s when you start one:

How These Medications Actually Work

Most people assume GLP-1s work by making your stomach feel full. That is not quite right, and the actual mechanism is more interesting. GLP-1 receptors are distributed throughout the brain, and the appetite suppression comes largely from the brain's own signaling system, not from the gut. The drugs blunt the urge to eat at a neurological level, which is why the effect feels qualitatively different from just eating a big meal.

The drugs also appear to reduce inflammation throughout the body in ways that researchers are still working to understand. There is growing evidence that some of the health benefits people experience on GLP-1s, including improvements in cardiovascular health, joint pain, and metabolic function, happen independently of weight loss. The mechanism is not fully understood, but it is real. These are not simply appetite suppressants. We are probably only beginning to understand what they do.

That said, the science is early. Do not let the hype outrun the data.

The Medication Suppresses Your Appetite. Your Body Still Needs Fuel

This sounds obvious until you're three weeks in and realize you've been eating 700 kcals a day without noticing (hint: that is too few). The side effect is that you stop feeling hungry, sometimes to a degree that becomes a problem. You have to eat...and consume a well rounded diet.

Your body still needs fuel to function. That means adequate protein to hold onto muscle, enough fiber to keep your digestion moving, micronutrients you are no longer getting from food volume, and enough total kcals to support basic metabolic function. Eating less is the point. Eating almost nothing is a problem. A well rounded diet matters more on these medications, not less, because every bite has to work harder. We cover the specifics on protein, fiber, and micronutrients in the sections below.

How You Eat Matters as Much as What You Eat

A few practical things that make a real difference on GLP-1s:

Small meals win. Every time. Trying to eat a normal-sized meal on these medications is asking for nausea. Eat less, more often, and stop before you feel full. You do not have to finish anything. A few bites, save the rest, move on. That mindset shift alone makes things significantly easier. To be clear, many people are successful on two-three meals per day without snacking. You just have to plan well.

Soft, warm foods go down better. High protein does not have to mean a dense chicken breast. Yogurt, cottage cheese, eggs, soft fish, tofu, beans, and well-cooked chicken are all solid protein sources that are much easier to tolerate. Dry or dense foods hit wrong even when the kcals are low. Pay attention to texture. Thank me later.

Do not skip meals thinking it will help the nausea. It usually makes the next meal worse. Waiting too long to eat on an empty stomach is a reliable way to feel terrible. Eat small amounts consistently rather than going long stretches without food.

On injection days specifically, keep it simple. Soup, broth, eggs, small portions of easy foods. Anything heavy is a bad idea. But everyone is different...see what works for you.

You Will Lose Muscle on a Caloric Deficit

Here is something I hear constantly and it drives me crazy: "GLP-1s make you lose muscle."

No. Any significant caloric deficits make you lose muscle. That is true on any diet, any protocol, any approach. When your body is running low on energy, it pulls from fat and from lean mass. The medication does not have some special power to accelerate muscle loss. What it does is make a large caloric deficit very easy to sustain for a long period of time, which means the risk compounds if you are not doing anything to counter it. Lean muscle is calorically demanding. The human body is always looking for ways to save energy. So on a low kcal diet plan bodies preferentially like to get rid of muscle.

The countermeasure is resistance training....my wheelhouse. Two days a week minimum. If you have never lifted, bodyweight work counts. Squats, pushups, lunges, planks, rows. The goal is to give your body a reason to hold onto muscle while it loses fat. Without that stimulus, it has no reason to. Contrary to what a lot of people think, how hard you train matters more than what exercises you pick. You do not need a perfect program. You need to show up and work. And for the record, there are no bad exercises, just bad execution. Keep it simple and stay consistent.

The medication changes the number on the scale. Training determines what that number is actually made of. We have all seen folks lose a bunch of weight on this medicine. The ones that exercise regularly look a lot better. Not to mention are healthier too.

Do Not Skip Cardio Either

Resistance training protects your muscle. Cardio protects your heart, your metabolic health, and your energy systems. The 2026 ACSM guidelines are clear on this: both modalities matter and neither replaces the other. If you are new to cardio or finding it hard to sustain intensity, Zone 2 training is the most practical place to start. A brisk walk counts. The bar is lower than most people think. Get off the sofa and go on a walk. If you have access to a treadmill, try incline walking. Or bike, row, jump rope or even box. Just do it.

Prioritize Protein

The research on preserving lean mass during a caloric deficit points consistently to 1.6g of protein per kilogram of goal bodyweight per day as the effective threshold. If math in kilograms does not mean much to you (America!), that works out to roughly 0.7g per pound of goal bodyweight. Use your goal weight, not your current weight. That gives you a target based on where you are headed. I typically recommend folks who are working out get .65g to 1g/lb daily

For most people, that lands somewhere between 100 and 130g of protein per day depending on their goal. You will see lower numbers floated online, 80 or 90g cited as sufficient (for some folks that works). That may keep you functional. It is not what the evidence supports for holding onto muscle while losing fat on a significant caloric deficit. There is a difference between a floor and a target.

Soft protein sources tolerate better on GLP-1s than dense meat. Yogurt, cottage cheese, eggs, soft fish, tofu, beans, and well-cooked chicken all count. Whey/Casein protein shakes (most bioavailable) are a practical tool on the days eating feels like a chore. That is not cheating. That is being smart about hitting your number when your appetite is working against you.

Hydration & Electrolytes Solve Lots of Problems

GLP-1s suppress thirst signals along with appetite. Most people do not realize this until they are dehydrated and wondering why they feel terrible. Fatigue, headaches, dizziness, nausea, constipation: all of these common side effects get dramatically worse when you are not drinking enough.

Aim for 2.5 to 3 liters of water a day (9-12 cups). Set a reminder if you have to. And add electrolytes if you are experiencing dizziness, random fatigue, or cramping. In my experience, electrolytes resolve a significant portion of the complaints people attribute to the medication itself.

Fiber Becomes Non-Negotiable

GLP-1s slow gastric emptying. That is how they work. The downstream effect is that digestion slows down with it, and constipation is one of the most common complaints on these medications. The fix is not a laxative. The fix is fiber.

Target 25 to 30g of fiber per day from real food sources: beans, lentils, vegetables, berries, whole grains. Ramp up gradually or you will trade one problem for another. Drink more water alongside every fiber increase. If you still find it hard to get enough fiber you can add Psyllium fiber powder to a drink, yogurt or cereal....it has no taste. I add it to my yogurt all the time.

Get Your Bloodwork Done

You are eating significantly less. That means your micronutrient intake dropped with it. The most common deficiencies on GLP-1 therapy are Vitamin B12, Vitamin D, iron, magnesium, and potassium. These are not minor. Low iron affects energy and cognitive function. Low B12 affects neurological health. Low Vitamin D affects immune function, mood, and bone density.

Get baseline labs before you start. Follow up at three to six months. A registered dietitian can help you identify what you actually need rather than guessing at the supplement aisle.

Side Effects Are Real and Mostly Temporary

Nausea, indigestion, and sulfur burps are the most common complaints in the early weeks. They are also the ones that make people quit before the medication has had a chance to work. They typically ease up as your body adjusts.

In the meantime: eat smaller meals, eat slowly, avoid high fat meals, stay upright for at least two hours after eating. If you have a history of acid reflux, pay extra attention to this. GLP-1s slow gastric emptying which means food sits in your stomach longer. That can aggravate existing reflux. Your doctor needs to know if it gets significantly worse.

TIP: Lots of folks say taking Pepto-Bismo or something like it before a meal helps.

Weight Loss Is Not Linear

Expect stalls. Expect fluctuations. You might even see the scale go up in a given week. That does not mean the medication stopped working. Weight loss and fat loss are not the same thing. Body weight shifts for a dozen reasons that have nothing to do with actual tissue change: water retention, glycogen, sodium, hormonal fluctuation.

A realistic rate of fat loss is around 0.5 to 1 percent of body weight per week. If you are losing that, you are doing well. If you are expecting five pounds a week every week, you are setting yourself up for unnecessary frustration. And many people report not losing anything for the first few weeks on the medicine.

Take monthly measurements. Track performance. Note energy. These tell a more complete story than the scale does.

If you have the time and money get a Dexa scan at the beginning and then six to twelve months later.

Food Noise Coming Back Does Not Mean the Medication Stopped Working

This catches a lot of people off guard. They experience strong appetite suppression early on, and then a few weeks in the food thoughts start creeping back. The assumption is that the medication is failing.

Usually it is not. Food noise returning is commonly tied to stress, poor sleep, low protein intake, or end of week timing before the next injection. Troubleshoot those variables before assuming something is wrong.

NOTE: Many people report a new found freedom because their thoughts are not constantly revolving around food.

The Medication Does Not Totally Fix Emotional Eating

This is the part nobody wants to hear. GLP-1s reduce appetite. They do not resolve the emotional or habitual patterns that drive eating. Boredom eating, stress eating, eating out of routine or anxiety: the medication makes these slightly easier to resist, but it does not make them disappear.

Use this period to pay attention to when and why you eat, not just how much. The people who keep their results long term are the ones who did that work.

Build the Healthy Habits Now

Consistency beats perfection here. Small habits, improved slightly week over week, built on top of each other over months. That is the version of this that works long term. Not flipping your entire life upside down in week one. If you want to understand what evidence-based training actually looks like, start there.

The Bottom Line

GLP-1 medications are a legitimate tool and I have seen them change people's lives. They are not magic, and they are not a substitute for the fundamentals. Protein, resistance training, hydration, fiber, sleep, bloodwork. These matter on GLP-1s the same way they matter on every other approach to body composition.

The medication lowers the barrier to getting started. What you build while the barrier is low determines whether any of it sticks.

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