21/09/2026
🧠 Most people think of muscle as being about strength or appearance. It is actually one of the most important organs in your body for surviving illness and ageing well.
Muscle as a survival reserve:
During serious illness, major surgery or significant infection the body enters a catabolic state, breaking down muscle tissue to supply amino acids for immune function, tissue repair and energy production. This is not a malfunction. It is the body drawing on its reserve to keep you alive.
The critical factor is how much reserve you have to draw on. Research consistently shows that people with greater muscle mass at the time of illness recover faster, experience fewer complications and have better overall outcomes. Low muscle mass, a condition called sarcopenia, is independently linked to worse outcomes across a wide range of conditions including cancer, cardiac events, surgical procedures and critical illness.
Your muscle is not stored vanity. It is biological insurance.
Muscle as a metabolically active organ:
Beyond its role as a reserve muscle is one of the most metabolically active tissues in the body. It is your largest glucose disposal system, every contraction pulls sugar out of the bloodstream independently of insulin, protecting against insulin resistance and type 2 diabetes over time.
Muscle also releases signalling proteins called myokines during contraction. These compounds reduce systemic inflammation, support cardiovascular function, protect neurological health and regulate metabolic processes throughout the body. The more muscle you carry the more of these protective signals your body produces with every movement.
What muscle actually predicts:
The research literature on longevity consistently identifies muscle mass and grip strength as among the strongest predictors of how long people live and how independently they function in later life. Not weight. Not BMI. Not cardiovascular fitness alone. Muscle specifically and the strength it produces, is what the data keeps returning to across study after study.
The loss most people are missing:
After the age of 40 the body loses roughly 1% of muscle mass per year without deliberate resistance training. That rate accelerates further without adequate protein intake. By 60 many people have lost 20% or more of the muscle they had at their peak and most attribute the fatigue, reduced resilience and slower recovery they experience to ageing.
Much of it is not ageing. It is muscle loss. And muscle loss is not inevitable, it is directly modifiable at almost any age.
How to build and keep it:
Strength training two to three times per week using compound movements, squats, presses, rows, hinges and carries, provides the stimulus the body needs to maintain and build muscle tissue. Adequate protein spread across meals rather than concentrated in one sitting supports muscle protein synthesis throughout the day. After 40 protein requirements increase and most people are significantly under-eating it.
The body retains the ability to respond meaningfully to resistance training at any age. Studies consistently show significant muscle gain in adults in their seventies and eighties with appropriate training. It is never too late to begin. But it is always earlier than it will be tomorrow.
The muscle you build today is the reserve your body draws on when it needs it most. Not in the gym. In a hospital bed. In a recovery room. In the years when independence matters more than anything else.
Build it now.
🚨 Comment QUIZ and I'll send you the free Aging Acceleration quiz — find out exactly where your body is losing the most ground. 👇
🚨 Comment AGE and I'll send you the full personalised Aging Acceleration assessment. 👇
For educational purposes only. Always consult a healthcare professional before beginning a new exercise programme.
