Why Muscle Loss Begins In Your 30s?

By Vanshika Gaur
23 Jul 2025, 11:00 IST

Muscle loss, also known as sarcopenia, often begins after the age of 30. We may experience a decline in muscle mass and strength due numerous reasons like early insulin resistance, slow metabolism, and more. Tap to know why muscle loss begins in the 30s!

Loss Of Fast Twitch Fibres

Fast Twitch Fibres (type II) helps support strength and speed. However with age, they start to decline and reduce our physical performance.

Early Insulin Resistance

Many people develop early insulin resistance, which affects nutrient absorption and makes it hard for the muscles to stay strong.

Slower Metabolism

With age, the metabolism slows down and makes our body use less energy and nutrients, making it difficult to maintain muscle mass.

Reduction In Growth Hormones

As we age, the growth hormones and testosterone also decline, which are also important for maintaining and building muscle mass.

Mitochondrial Decline

The powerhouse of the cell, Mitochondria, also declines with age, providing less energy to muscles and reducing their endurance.

Poor Sleep Quality

After 30s, the sleep quality drops and slows down muscle recovery, increasing the risk of muscle loss and slow recovery after exertion.

Reduced Physical Activity

After a certain age, especially after 30s, individuals have reduced physical activity due to stress, work, and more, making it hard for the muscles to stay strong.

Information Credits

According to PubMed, muscle loss after 30s can be due to loss of fast twitch fibre, reduced physical activity, and more. It is advisable to consult a healthcare professional for personalised suggestions.