Muscle mass loss, a silent threat in the elderly

As we age, our bodies continuously undergo changes in muscle mass, fat distribution, and bone density. Reduced physical activity over time leads to a gradual loss of muscle mass, as well as decreased muscle strength and flexibility. Research indicates that after the age of 30, physically inactive individuals may lose approximately 3–5% of their muscle mass every decade, with total muscle loss reaching up to 30% throughout their lifetime.

In addition, fat tends to accumulate in various parts of the body, infiltrating muscles and internal organs. In older adults who consume excessive amounts of carbohydrates and sugar, fat is more likely to accumulate around the abdominal cavity, known as visceral fat, which is a major risk factor for non-communicable diseases (NCDs).

A condition characterized by excessive body fat combined with reduced muscle mass and muscle strength is known as “Sarcopenic Obesity.” This condition is commonly found among older adults and can result in weakness and difficulty with mobility. Elderly individuals with muscle loss are more than three times more likely to experience falls compared to those with normal muscle mass. Therefore, it is important for everyone to recognize and address this issue, as it may lead to serious injuries or even death.

Understanding the Risks of Sarcopenic Obesity

Body Composition Assessment

Calculating Body Mass Index (BMI) using only height and weight may not accurately detect this condition. A comprehensive body composition analysis is necessary and can be performed using Dual-Energy X-ray Absorptiometry (DEXA), which is considered one of the most accurate methods available. DEXA provides detailed information regarding muscle mass, fat mass, and bone mass distribution throughout the body.

Factors Contributing to Sarcopenic Obesity

1. Poor Nutritional Status

Many older adults consume insufficient amounts of protein due to loss of appetite or dental and gum problems. This contributes to muscle breakdown and loss of muscle mass. At the same time, aging reduces the body’s metabolic rate, making it easier to accumulate excess calories and body fat.

Older adults without chronic kidney disease are generally recommended to consume approximately 1–1.2 grams of protein per kilogram of body weight per day. Easily digestible protein sources include fish, tofu, grains, and legumes.

2. Lack of Exercise

It is common for older adults to avoid exercise due to limited mobility or fear of falling. Unfortunately, physical inactivity further increases fat accumulation and accelerates muscle loss.

Older adults are encouraged to engage in simple cardiovascular exercises such as brisk walking, arm swinging, or marching in place to help burn excess fat. Resistance exercises, such as lifting light weights, are also beneficial for strengthening muscles.

Studies have shown that weight reduction programs for older adults that combine dietary modification with exercise three times per week, for at least 90 minutes per session, can be highly effective. Such programs may reduce body weight by approximately 5%, improve insulin sensitivity, and decrease fat infiltration within muscles, while preserving most muscle mass.

Sarcopenic obesity is a silent yet dangerous health condition. Older adults should undergo regular body composition assessments, exercise consistently, and maintain proper nutrition in order to reduce the risk of future illnesses and complications.

References

Landi F, Liperoti R, Russo A, Giovannini S, Tosato M, Capoluongo E, et al. Sarcopenia as a risk factor for falls in elderly individuals: results from the ilSIRENTE study. Clin Nutr. 2012 Oct;31(5):652-8.

Zamboni M., Mazzali G., Fantin F., Rossi A., & Di Francesco V. (2008). Sarcopenic obesity: a new category of obesity in the elderly. Nutrition, Metabolism and Cardiovascular Diseases, 18(5), 388-395.

Zamboni G., Benati C., Bambara V., Negri M., Bosello O., Zamboni M., et al. Interrelations between fat distribution, muscle lipid content, adipocytokines, and insulin resistance: effect of moderate weight loss in older women. Am J Clin Nutr. 2006 Nov;84(5):1193-9.