Losing fat over 40

What actually changes after 40

• Muscle mass. From middle age, people who do not strength train gradually lose muscle and strength. Less muscle means slightly lower energy use and, more importantly, less capacity for activity.
• Daily movement. Desk jobs, driving, lifts to kids' clubs and busier evenings all cut steps. This is often the biggest single change.
• Sleep. Many people sleep worse in their 40s, through stress, young children, ageing parents or perimenopause. Poor sleep raises appetite and cravings.
• Recovery. Hard sessions take longer to bounce back from, so going flat out every day tends to backfire.
• Alcohol and portions. A glass of wine most evenings and bigger portions often creep in as life gets more comfortable.
• Hormones. For women, perimenopause usually begins in the 40s. For men, testosterone declines slowly with age, and excess fat pushes it lower.

Put those together and it is easy to gain a kilo or two a year without eating dramatically differently. Over a decade, that adds up to a very different body.

Strength training is non-negotiable now

If you do one thing, lift weights two or three times a week. It slows or reverses age-related muscle loss, supports bone density, improves blood sugar control and keeps you capable in daily life. It also makes sure the weight you lose comes mostly from fat.

You do not need to go from nothing to heavy barbells in week one. Start with bodyweight, dumbbells and kettlebells, learn the basic squat, hinge, push and pull patterns, and build up steadily. Our guide to strength training over 50 applies to many people in their 40s too, especially those coming back after years off.

Eat for your muscles

Older muscle responds a little less efficiently to protein, a process sometimes called anabolic resistance. The practical answer is to hit a daily total of around 1.6 to 2.2 g per kg of body weight and make each main meal contain a decent serving, around 30 to 40 g, rather than grazing on small amounts. Our guide to nutrition over 50 covers this in more depth.

Keep the deficit moderate. Crash diets tend to cost older adults more muscle, and muscle gets harder to regain with age. Aim for 0.5 to 1% of body weight a week, and prioritise fibre, fruit and vegetables for fullness and gut health.

Alcohol deserves an honest look at this age. It adds calories, disrupts sleep and makes early training harder, and many people find a couple of glasses of wine hit their sleep harder in their 40s than they did in their 20s. A few alcohol-free nights a week is one of the simplest changes, with a knock-on effect on everything else.

Recovery is part of the plan

At 25 you could get away with five hard sessions a week on six hours of sleep. At 45, most people cannot. That does not mean training less seriously; it means spacing hard sessions out, building in easier days and treating sleep as part of training.

• Two to four strength sessions, with an easier day between the hardest ones.
• One or two conditioning sessions, not five.
• Daily walking as the base.
• Seven to nine hours of sleep as the target.

Our guide on recovery over 40 has more on managing training load when life is busy.

Women in their 40s: perimenopause

Perimenopause usually starts in the 40s and can last several years before periods stop. Many women notice fat moving towards the stomach, poorer sleep, hot flushes and lower mood, all of which make fat loss feel harder than it used to.

Strength training, protein and sleep become even more valuable at this stage. Our guide on menopause and fat loss covers it in detail, and your GP can talk you through symptoms and treatment options such as HRT.

Making it work in real life

Your 40s are often the busiest decade: career, children, parents. The plan has to fit around that. Early morning training works well for a lot of people because it happens before the day gets in the way. Walking meetings, a default lunch and a set number of alcohol-free nights take care of much of the rest.

Do not forget balance and mobility either. The UK Chief Medical Officers' guidelines recommend activities that improve strength and balance as we age, and a good strength programme with some single-leg work, carries and controlled lowering covers a lot of that without extra time.

If you are getting back into training after years off, you are far from alone. Our guide to getting back into fitness is a good place to start. Lycan Strength has members of all ages and levels training together in scalable classes, and the 7-day free trial includes a complimentary fitness assessment so you start at the right level.