Sarcopenia is the age-related loss of muscle mass, strength and function. It develops gradually, which is why most people don’t notice it until everyday tasks — climbing stairs, carrying shopping, getting up from the floor — start to feel harder.
When it starts
Muscle mass typically peaks in our 30s. From then on, adults lose a small percentage each decade if they don’t actively work to maintain it, and the rate accelerates later in life. For women, the drop in estrogen around menopause appears to speed up muscle loss.
Strength tends to decline even faster than muscle size, because the nerves that activate muscle fibres also change with age.
Why it matters
Muscle does far more than move you:
- It’s the body’s main site for clearing blood sugar, so less muscle raises diabetes risk.
- It protects joints and supports balance, reducing falls.
- It loads bones, helping maintain density.
- It’s linked to independence and quality of life in later years.
How to fight it
Strength training is the most effective intervention. Lifting weights, using resistance bands or doing bodyweight exercises two to three times a week builds and maintains muscle at any age. Studies show that even people in their 80s and 90s gain strength with training.
Progressive overload matters. Muscles adapt only when challenged, so the weight or difficulty needs to increase gradually.
Protein supports the process. Many researchers suggest older adults aim for around 1.0–1.2g of protein per kilogram of body weight a day, spread across meals.
Stay active overall. Walking and daily movement complement strength training.
Consider power, too. Moving quickly — like rising from a chair briskly — trains the fast muscle fibres that help you catch yourself when you trip.
Signs worth noticing
Struggling to rise from a chair without using your arms, slower walking speed, weaker grip, or difficulty with stairs can all signal declining muscle function. It’s never too late to start — but the earlier, the better.