Loss of strength refers to a reduction in one's ability to exert force or power using their muscles. This can have several potential causes:
Aging - As we get older, we naturally lose muscle mass and strength through a process called sarcopenia. On average, adults can lose up to 8% of their muscle mass per decade after age 30. - Loss of strength with age is often most noticeable in the legs, which can make activities like getting up from a chair more challenging.
Injuries and Medical Conditions - Injuries such as sports injuries or repetitive strain injuries can damage muscles and connective tissues, reducing strength. For example, a torn rotator cuff can severely limit a person's arm and shoulder strength. - Diseases like arthritis, multiple sclerosis, and Parkinson's disease can progressively weaken muscles over time. Cancer and its treatments can also contribute to loss of strength.
Lack of Physical Activity - If muscles are not adequately worked on a regular basis through weight/resistance training, stretching, aerobic activity or normal daily usage, they will weaken and lose mass over time. This is the "use it or lose it" principle. - Extended periods of inactivity, such as long hospital stays or sedentary desk jobs, accelerate loss of strength if physical activity is not maintained.
Poor Nutrition - Consuming inadequate calories, protein and micronutrients can contribute to loss of muscle mass. This robs the muscles of the fuel and building blocks they need to maintain their health and performance. - Diseases that impair nutrient absorption like Crohn's disease can also accelerate loss of strength over time.
So in summary, reduced strength capability stems from a diverse range of factors: aging, injuries, illnesses, inactivity and poor diet. Seeking prompt medical advice for sudden severe or progressive loss of strength is always advisable, as it may indicate an underlying health condition requiring treatment. With proper self-care, some loss of strength can be minimized or reversed.