3. April 2026
Weight Loss Medications: How to Lose the Fat and Keep Your Strength as You Age
If you’re over 40 and exploring prescription weight loss medications, you’re not alone. Treatments like Ozempic, Wegovy, Mounjaro and other GLP-1 options are helping many people in Towcester and across the UK achieve significant, sustainable weight loss by reducing appetite and supporting better blood sugar control.
As a personal trainer specialising in the over-40s here at Helen Percival Fitness, I’m fully supportive of these medications when prescribed by a doctor. They can be a genuine game-changer. But there’s one important detail that often gets missed: rapid weight loss can lead to a noticeable loss of muscle if you’re not careful.
In this article, I’ll explain why protecting your muscle matters more than ever after 40, and how the right combination of strength-focused training and smart nutrition can help you lose fat while staying strong, mobile and energised.
Why Muscle Matters — Especially When Using Weight Loss Drugs
These medications work brilliantly for many by creating a calorie deficit without constant willpower. However, when weight drops quickly, the body can break down both fat and lean muscle tissue. Losing too much muscle can leave you feeling weaker, slower, and more prone to aches or injuries — something none of us want as we get older.
Strong muscles help keep your metabolism ticking, support your joints, improve balance and posture, and make everyday life easier. The good news? You can protect and even rebuild muscle while the medication does the heavy lifting on appetite control.
How I Can Help You Train Smart Alongside Weight Loss Medication
At Helen Percival Fitness in Towcester, I specialise in safe, effective training for adults over 40 — including those recovering from surgery or managing changing bodies. My approach is joint-friendly, progressive, and tailored to real life.
Here’s exactly how I support clients who are using weight loss injections or tablets:
1. Personalised 1:1 Training Sessions One-to-one sessions allow me to build a programme around any side effects you might experience (such as fatigue or reduced energy). We focus on compound strength movements that preserve muscle without stressing your joints. Many clients see noticeable improvements in strength and tone within weeks, even while their overall weight is decreasing.
2. Small Group Sessions My small group classes offer the perfect balance of motivation, variety and affordability (starting from as little as £30 per class). You’ll train with like-minded people in a supportive environment while I guide you through exercises designed to maintain muscle and improve mobility.
3. Mat Pilates Classes These low-impact sessions are ideal alongside weight loss medication, (starting from as little as £16 per class). They strengthen your deep core, boost flexibility, reduce aches and pains, and complement strength work beautifully — helping you stay mobile and feel good in your body as the weight comes off.
4. Post-Surgery and Over-40s Specialism If you’ve had surgery or simply want training that feels safe and sustainable, my programmes are designed with your needs in mind. We progress at the right pace for your body, focusing on building functional strength that supports long-term health.
Whether you choose 1:1 coaching, small groups or a combination, I’ll help you:
- Prioritise resistance training 2–4 times per week using exercises like squats, rows, presses and deadlift variations (modified for joint health)
- Hit adequate protein intake even when your appetite is lower
- Include mobility and recovery work so you feel strong rather than depleted
- Track progress with more than just the scales — strength gains, measurements, energy levels and how your clothes fit
Clients often tell me they end up looking firmer, feeling more capable and moving better at their new weight than they expected.
Practical Tips While on Weight Loss Medication
- Strength first: Aim for challenging but safe weights in the 8–12 rep range to tell your body to hold onto muscle.
- Smart cardio: Gentle walks or light activity are great, but avoid excessive sessions that could increase muscle loss.
- Nutrition focus: Even with smaller portions, include good sources of protein regularly — eggs, Greek yoghurt, fish, chicken or a quality shake can make all the difference.
- Recovery matters: Prioritise sleep and hydration, especially if the medication leaves you feeling tired.
The Helen Percival Fitness Difference
I don’t believe in one-size-fits-all programmes. Every plan is built around your goals, your energy levels and your lifestyle as a busy adult over 40. Many of my clients combine weight loss medication with my training and report feeling stronger, more confident and far more in control of their results.
If you’re currently using one of these medications — or thinking about discussing them with your GP — I’d love to help you do it the smart way: losing fat while protecting the muscle that keeps you independent and active for years to come.
Ready to Train with Confidence?
Take advantage of my current offer: 50% off your first 1:1 session. You’ll receive personalised guidance tailored exactly to your needs, whether you’re just starting medication or already seeing results.
Get in touch today via the contact page on my website or book your spot in one of my small group or Pilates classes in Towcester. Let’s make sure your weight loss journey leaves you stronger, not just smaller.
Have questions about training while on weight loss medication? Feel free to drop me a message — I’m always happy to chat and share what’s worked for other clients in the same situation.
Here’s to feeling strong and confident in your body,
Helen Percival Personal Trainer | Towcester Helen Percival Fitness
Disclaimer: This article is for information and inspiration only and is not medical advice. Weight loss medications must be prescribed and monitored by your GP or specialist. Please consult your doctor before starting any new exercise programme or changing your medication, especially if you have any health conditions or are recovering from surgery.