LIFESTYLE NEWS - Trying to recreate the body you had in your twenties may not be the best measure of health as you get older.
Muscle mass, bone density, fat distribution, hormones and lifestyle demands all change throughout adulthood.
Comparing an older body with a much younger version of yourself can therefore create unrealistic expectations about what a healthy weight and good metabolic health should look like.
Dr Gerhard Vosloo, Founder and Head Consulting Practitioner at Dr GL Vosloo Medical Practice, managed by BioWell, says one common explanation for weight gain in midlife is that metabolism simply slows down after the twenties.
However, large studies measuring daily energy expenditure suggest that, after taking body size and composition into account, metabolism remains relatively stable from about age 20 to 60 before declining later in life.
“The body often changes much earlier than your metabolism,” says Dr Vosloo.
“Muscle can decline while fat accumulates around the abdomen, and everyday movement can fall as adult life becomes more sedentary. In your twenties, you may have walked across campus every day, played sport several times a week, stayed out late, and simply moved more. Later in life, desk and couch time tend to dominate your time.”
Sleep, stress, illness, medication, parenthood, injury and other pressures can also affect the balance between energy consumed and energy used.
The result is that an older body living a very different lifestyle cannot necessarily be expected to look, function or have the same needs as a younger one.
Instead of trying to recreate an earlier version of yourself, Dr Vosloo says health goals should evolve with age - shifting from building physical reserves to protecting and preserving them.
Twenties: Build a strong foundation
Your twenties are an important time to build both physical strength and habits that can support health in later decades.
Resistance training, adequate nutrition, sufficient protein, regular movement and recovery can all contribute to muscle strength, cardiovascular fitness and stronger bones.
The benefits extend beyond how your body looks in the present. Building physical capacity early can provide a stronger foundation for middle age and beyond.
Thirties: Protect against the effects of a busier lifestyle
For many people, the thirties bring major lifestyle changes. Work can become more sedentary, exercise may become less frequent and sleep can be disrupted by young children, demanding careers or other responsibilities.
Meals may also increasingly be dictated by convenience.
“There isn’t a sudden metabolic cliff at 30,” says Dr Vosloo. “The big risk is that energy intake stays similar while daily movement falls and muscles are challenged less often.”
Small changes repeated over many years can gradually affect body composition, even without a dramatic increase in weight.
Forties: Look beyond the number on the scale
By the forties, years of reduced movement, changing eating patterns, gradual muscle loss and increasing abdominal fat may become more noticeable.
Someone can weigh only slightly more than they did when they were younger while having less muscle and more fat around the waist.
For women, perimenopause can also bring additional changes. Fluctuating and declining oestrogen levels can affect fat distribution, while disrupted sleep and other symptoms can make exercise, appetite management and recovery more challenging.
Men generally experience hormonal changes more gradually, but preserving muscle and limiting abdominal fat remain important considerations.
Fifties: Adapt to changing hormones and body composition
Menopause can bring significant changes in body composition. Declining oestrogen may contribute to increased abdominal fat, while maintaining muscle and bone can become more challenging.
Dr Vosloo cautions against responding with overly aggressive dieting when strength, nutrition and metabolic health need greater attention.
Resistance training, sufficient protein, appropriate energy intake and a focus on bone health become increasingly important.
Men may experience a more gradual shift, but preserving muscle and managing abdominal fat should also become priorities.
Sixties and beyond: Protect strength and independence
From the sixties onwards, muscle loss and declining physical capacity become increasingly important considerations, while energy requirements may also decrease.
For this reason, weight management should focus on preserving strength, mobility, balance, bone health and adequate nutrition rather than simply trying to lose as much weight as possible.
“At a certain point, the question shouldn’t be, ‘How do I get back to the body I had at 25?’” says Dr Vosloo.
“A more useful question is, ‘What does my body need now, and what do I want it to be capable of 10 or 20 years from now?’”
The answer will be different for everyone, because body composition, health history, lifestyle and physical needs vary.
Dr Vosloo recommends taking an individual approach to metabolic and weight management, including appropriate medical assessments and regular reviews as needs change.
Ultimately, healthy ageing is not about trying to turn back the clock. It is about understanding what your body needs at its current stage of life and taking steps to preserve strength, mobility and wellbeing for the years ahead.
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