Maintaining weight loss after GLP-1 medications

GLP-1 medications - Ozempic, Wegovy, Mounjaro - have changed weight loss for a lot of people. They reduce appetite, slow gastric emptying, and make it possible to feel satisfied on far less food. Losses of 10-15% of body weight within a year are common, and for many people it's the first time a diet has ever felt manageable.

But there are two problems the prescription doesn't solve, and they decide whether the result lasts.

Problem one: you're not just losing fat

Studies of semaglutide and tirzepatide suggest that somewhere between a quarter and 39% of the total weight lost can be lean mass - muscle, not fat. The scale doesn't show the difference, but your body feels it: less strength, lower day-to-day energy expenditure, and a softer look at your goal weight than you expected - what people unkindly call "skinny fat".

It also matters for what comes next. Muscle is your buffer against regain: it keeps your metabolism higher, supports blood sugar control, and lets you eat more at maintenance without gaining. Losing a third of your weight as muscle means arriving at your target weight with a smaller engine.

Problem two: the medication doesn't teach you anything

GLP-1s quiet the appetite signals - they don't change what you know about feeding yourself. When you stop, your appetite comes back, but your habits are wherever you left them. That's why studies show most people regain a significant share of the weight within a year of stopping. It's not weakness; it's what happens when the only thing that changed was the medication.

While you're on it: protect the muscle

• Strength train 2-3 times a week. This is the single strongest signal you can send your body to keep muscle while losing weight. Full-body sessions with progressive resistance are enough - you don't need a bodybuilder's schedule. My free 3-day full-body programme is built for exactly this.
• Prioritise protein: 1.6-2.2g per kg of body weight daily. The hard part on a GLP-1 is appetite - you're rarely hungry enough to eat that much. Eat the protein portion of your meal first, use dairy and eggs liberally, and don't be precious about shakes on low-appetite days. The protein guide has practical numbers per food.
• Don't chase the fastest possible loss. The more aggressive the deficit, the higher the share of muscle in what you lose. A steadier rate with training and protein keeps the loss mostly fat.
• Keep moving between sessions. Daily steps protect your energy expenditure and are the easiest habit to keep when appetite (and energy) is low.

Coming off: the off-ramp, step by step

The transition is where the result is won or lost, and it goes far better when it's planned rather than endured.

• 4-6 weeks before stopping: start tracking what you actually eat while appetite is still quiet. This is the cheapest time to learn portion sizes, build a meal structure, and get the training habit locked in - you're practising maintenance with the difficulty turned down.
• The first weeks after: expect appetite to return - it isn't failure, it's physiology. Decide in advance what your responses are: protein-anchored meals, a consistent eating window, and a short list of high-volume foods for genuinely hungry days.
• Find your maintenance calories: hold your weight steady for a few weeks and you've found the number. Track loosely during this period, then let the structure carry you - most people can stop logging once the patterns are automatic.
• Watch trends, not days: weigh in a few times a week, judge the weekly average, and agree with yourself in advance what happens if the trend creeps up (it's a two-week correction, not a crisis).

Where coaching fits

None of this is complicated, but almost all of it benefits from someone watching the trend with you: adjusting training as your weight changes, sanity-checking the protein maths, and being the voice that says "this is normal, hold the line" in week three when the appetite is loud. That's the difference between a plan and a plan you actually follow.

The goal was never the number on the scale - it's being a stronger, more capable version of yourself who happens to weigh less, and stays there. That's a skill set, and it's learnable.