Women’s metabolism after 40

Your metabolism changes in your 40s: your body burns less energy, you lose muscle mass more easily, and your waistline may start to expand even if you’re still working out. The good news is that strength training, gentler aerobic exercise and more careful food choices can do a lot to slow these changes.

Written by Daryn Eller, “Fitness”; translated by Pille Mitt, “Stuudio 99”.

Why does your metabolism change after 40?

Not everything happens overnight in your forties. You’re more likely to notice little things. The same breakfast doesn’t keep you as full. The same workout no longer changes your shape as quickly. Your waistband feels tighter, even though your weight may be almost the same.

One reason is muscle mass. From the age of 40, most women lose around 150 grams of muscle mass a year. That may not sound like much, but over the years the difference becomes noticeable. Muscle is energy-hungry tissue. When you have less muscle, your body burns less energy at rest.

Hormonal changes also play a role. As you approach menopause, fat may start to accumulate more easily around your lower abdomen. Even slim, athletic women can develop a small belly. This isn’t laziness or a lack of willpower. Your body is changing, and you need a smarter approach to those changes.

Then everyday life gets in the way. You have more responsibility at work, more commitments at home, less sleep, and your workout gets pushed back to “tomorrow”. Stress doesn’t make things any easier.

How can you get your metabolism working better again?

The simple truth is that you don’t have to live less fully in your 40s, but your body needs more attentive care. The biggest difference comes down to three things: how much you eat, strength training and stress management.

Review what and how much you eat

As your metabolism slows, your body burns ~120 fewer calories a day than it did in your twenties. That doesn’t mean you need a strict diet. Small choices are often enough: a few fewer slices of bread, sugary drinks less often, and a more mindful approach to evening snacking.

Another option is to add a few minutes to your daily physical activity. Doing this consistently has a greater effect than one “perfect” week that leaves you exhausted.

Ease your stress

Stress raises cortisol levels. This can increase cravings for foods high in fat and carbohydrates. So what’s actually happening? Your body is looking for quick comfort and energy, especially after a long day.

Training helps reduce these cravings because physical activity stimulates the release of chemicals such as beta-endorphin, adrenaline and serotonin. Dr. Pamela Peeke sums it up well: calm your mind, and your appetite will settle down on its own.

Breathing exercises can help too. They don’t have to be complicated. A few minutes of slow breathing before dinner may help you make a better choice instead of automatically grabbing another snack.

Take a smarter approach to aerobic training

Overly intense training can take more of a toll as you age. If your body is constantly tired or your joints are complaining, aerobic exercise doesn’t have to feel like punishment. Swimming, walking and cycling are good choices.

Exercise at an easy pace 4-5 times a week. Keep your heart rate at around 65% of your maximum heart rate (220 minus your age) most of the time. You can increase your training load to ~80 % of your maximum heart rate 1 or 2 times a week, but only if you’re recovering well.

Strength training and metabolism: what should you do at the gym?

Protein synthesis slows as you get older. This makes it harder to maintain and build muscle mass. That’s precisely why strength training is especially important in your forties.

Choose a weight that allows you to complete 8-10 repetitions per set. The last few repetitions should take effort, but your technique should remain solid. Heavier weights also produce a post-workout fat-burning effect. Recent studies have shown that women who lift heavier weights burn around 50% more calories during the first hour after training, and slightly more during the second hour too.

Don’t skip your warm-up. The older you get, the longer it should be. It’s a simple precaution, especially if you’ve spent the day sitting or the weather is cold.

• After warming up, complete a lower-body circuit 3 times: 12-20 repetitions of squats, lunges and calf raises. You can hold dumbbells or rest a barbell across your shoulders.
• After each round, do 3 min. of aerobic exercise at a moderate intensity.
• Then complete 3 rounds of upper-body exercises: 12-15 repetitions of supine chest presses with a ball or barbell, biceps curls with a barbell or dumbbells, rows and shoulder presses with a barbell or dumbbells.
• Then do another 3 min. of aerobic exercise.
• Finish with 2x 20 knee push-ups and 2x 20 inner-thigh squeezes, holding a ball or pillow between your thighs.
• At the very end, do 10 min of aerobic exercise at a moderate pace.

The whole workout will take you 45-50 min. That’s long enough to give your body a proper workout, but short enough to fit into your life.

Practical tips to keep your metabolism going

Don’t look for a single miracle trick. In your forties, consistency can make all the difference. Schedule regular strength training sessions each week, keep walking or cycling simple, and take an honest look at your portion sizes.

If fatigue builds up, reduce your training load rather than giving up altogether. An easy week is better than a complete break. And if your appetite surges in the evenings, ask yourself before eating: am I hungry, stressed, or just eating out of habit?

Honestly, this is the age when your training needs to become smarter. Not easier, but more precise.

FAQ

Does everyone’s metabolism slow down after 40?

Yes, to some extent, but the rate varies. Muscle mass, sleep, stress, nutrition and training all influence how much you notice the change in everyday life.

Is aerobic training alone enough?

Usually not. Aerobic activity supports heart health and energy expenditure, but you need strength training to maintain muscle mass. The two work better together.

How often should you do strength training?

Start at a level that allows you to recover well and maintain good technique. If you follow the circuit training workout described here, pay attention to how you feel and increase your training load gradually.

END

Author: Pille Mitt

Source: WHO – physical activity.

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