Body Composition: The Key To Brain And Overall Health

Body composition refers to the proportion of fat, muscle, bone, and water in the body [1]. It is a vital aspect of overall health and plays a significant role in brain health and cognitive function. In this article we will delve into the importance of body composition, its impact on overall health, brain health, and cognitive function, as well as factors affecting body composition and methods to improve it.

Components of Body Composition

Fat mass
Fat mass refers to the total amount of adipose tissue in the body, which can be further classified as essential fat and storage fat [1]. Essential fat is necessary for normal physiological functioning, while storage fat serves as an energy reserve [2].

Lean body mass
Lean body mass includes muscles, bones, organs, and all other non-fat tissues in the body [3].

Muscles
Muscles are essential for movement, posture, and overall physical strength. They also play a crucial role in metabolism and energy expenditure [4].

Bones
Bones provide structural support, protect vital organs, and facilitate movement. They also store minerals and contribute to overall strength and stability [5].

Organs
Organs, such as the heart, lungs, and kidneys, perform vital functions that support life and maintain overall health.

Water content
Water is a crucial component of the body, making up approximately 60% of the body weight [6]. It is involved in numerous physiological processes, including digestion, absorption, and transportation of nutrients, as well as temperature regulation and waste elimination.

Importance of Body Composition for Overall Health

Role in preventing chronic diseases

Obesity
Excess body fat, particularly visceral fat, is associated with an increased risk of obesity-related conditions, such as type 2 diabetes, cardiovascular diseases, and certain types of cancer [7].

Type 2 diabetes
A higher percentage of body fat is linked to insulin resistance, which can lead to the development of type 2 diabetes [8].

Cardiovascular diseases
Higher amounts of body fat, especially visceral fat, contribute to a higher risk of developing cardiovascular diseases, such as hypertension, atherosclerosis, and coronary artery disease [9].

Impact on physical performance

A higher lean body mass, including muscle mass, is associated with improved physical performance, strength, and balance [10]. Conversely, excess body fat can negatively affect physical performance by increasing the workload on the joints and cardiovascular system [11].

Influence on metabolism and energy balance

Lean body mass is the primary determinant of resting metabolic rate, which is the number of calories the body burns at rest [12]. A higher lean body mass contributes to a higher resting metabolic rate, making it easier to maintain or lose weight [13].

Body Composition and Brain Health

Effects of excess body fat on brain structure and function

Increased risk of cognitive decline and dementia
Higher body fat levels, particularly visceral fat, have been associated with an increased risk of cognitive decline and dementia, including Alzheimer's disease [14].

Impact on neuroinflammation and oxidative stress
Excess body fat can contribute to neuroinflammation and oxidative stress, which have been linked to cognitive impairment and the development of neurodegenerative diseases [15].

Importance of lean body mass for brain health

Role in maintaining adequate blood flow to the brain
Lean body mass, particularly muscle mass, is important for maintaining adequate blood flow to the brain, which is essential for delivering oxygen and nutrients necessary for optimal brain function [16].

Support for optimal cognitive function
Higher lean body mass is associated with better cognitive function, including processing speed, attention, and memory [17].

Factors Affecting Body Composition

Diet and nutrition
The quality and quantity of food consumed play a crucial role in determining body composition [18]. A balanced diet that includes appropriate amounts of carbohydrates, proteins, fats, vitamins, and minerals is essential for maintaining a healthy body composition [19].

Physical activity
Regular physical activity helps promote a healthy body composition by increasing lean body mass, particularly muscle mass, and reducing body fat [20]. Both aerobic and resistance exercises are important for achieving optimal body composition [21].

Genetics
Genetic factors can influence body composition by affecting factors such as body fat distribution, muscle mass, and metabolic rate [22].

Hormones
Hormones, such as cortisol, insulin, and thyroid hormones, can impact body composition by influencing metabolism, appetite regulation, and fat storage [23].

Sleep and stress
Poor sleep quality and chronic stress can negatively impact body composition by altering hormone levels, increasing appetite, and reducing energy expenditure [24].

Methods to Improve Body Composition

Adopting a healthy diet

Balanced macronutrient intake
Consuming an appropriate balance of carbohydrates, proteins, and fats is essential for optimizing body composition [25].

Incorporation of fruits and vegetables
A diet rich in fruits and vegetables can help improve body composition by providing essential nutrients and fiber, which aid in weight management and overall health [26].

Limiting processed foods and added sugars
Reducing the intake of processed foods and added sugars can help improve body composition by promoting better blood sugar control and reducing overall calorie consumption [27].

Engaging in regular physical activity

Aerobic exercise
Aerobic exercises, such as walking, running, cycling, and swimming, can help improve body composition by increasing energy expenditure and reducing body fat [28].

Strength training
Resistance or strength training exercises, such as weight lifting and bodyweight exercises, can help increase lean body mass and improve overall body composition [29].

Flexibility exercises
Incorporating flexibility exercises, such as yoga and stretching, can help improve overall body composition by promoting muscle balance, joint mobility, and posture [30].

Managing sleep and stress

Prioritizing sleep and practicing stress management techniques, such as meditation and mindfulness, can help improve body composition by promoting hormonal balance and reducing the risk of overeating [31].

Body composition is a critical aspect of overall health, brain health, and cognitive function. By understanding its importance and the factors that influence it, we can take steps to improve our body composition and support overall health and cognitive function throughout our lives.

References
[1] Heyward, V. H., & Wagner, D. R. (2004). Applied body composition assessment. Human Kinetics.
[2] Wang, Z., Ying, Z., Bosy-Westphal, A., Zhang, J., Schautz, B., Later, W., ... & Müller, M. J. (2010). Specific metabolic rates of major organs and tissues across adulthood: evaluation by mechanistic model of resting energy expenditure. The American journal of clinical nutrition, 92(6), 1369-1377.
[3] Kim, J., & Wang, Z. (2012). Human body composition. Nutrition, 2, 69-75.
[4] Wolfe, R. R. (2006). The underappreciated role of muscle in health and disease. The American journal of clinical nutrition, 84(3), 475-482.
[5] Rizzoli, R. (2014). Nutrition and bone health. In Osteoporosis and Bone Biology - The State of the Art (Vol. 41, pp. 57-79). Karger Publishers.
[6] Popkin, B. M., D'Anci, K. E., & Rosenberg, I. H. (2010). Water, hydration, and health. Nutrition reviews, 68(8), 439-458.
[7] Poirier, P., Giles, T. D., Bray, G. A., Hong, Y., Stern, J. S., Pi-Sunyer, F. X., & Eckel, R. H. (2006). Obesity and cardiovascular disease: pathophysiology, evaluation, and effect of weight loss. Circulation, 113(6), 898-918.
[8] Kahn, S. E., Hull, R. L., & Utzschneider, K. M. (2006). Mechanisms linking obesity to insulin resistance and type 2 diabetes. Nature, 444(7121), 840-846.
[9] Després, J. P. (2001). Health consequences of visceral obesity. Annals of Medicine, 33(8), 534-541.
[10] Hairi, N. N., Cumming, R. G., Naganathan, V., Handelsman, D. J., Le Couteur, D. G., Creasey, H., ... & Sambrook, P. N. (2010). Loss of muscle strength, mass (sarcopenia), and quality (specific force) and its relationship with functional limitation and physical disability: the Concord Health and Ageing in Men Project. Journal of the American Geriatrics Society, 58(11), 2055-2062.
[11] Vincent, H. K., & Vincent, K. R. (2009). Obesity and inactivity: relationship with chronic diseases, functional limitations, and disability. In The Role of Integrative Medicine in the Treatment and Prevention of Chronic Diseases (pp. 235-258). CRC Press.
[12] Müller, M. J., Bosy-Westphal, A., & Heymsfield, S. B. (2010). Is there evidence for a set point that regulates human body weight? F1000 Medicine Reports, 2.
[13] Stiegler, P., & Cunliffe, A. (2006). The role of diet and exercise for the maintenance of fat-free mass and resting metabolic rate during weight loss. Sports Medicine, 36(3), 239-262.
[14] Whitmer, R. A., Gustafson, D. R., Barrett-Connor, E., Haan, M. N., Gunderson, E. P., & Yaffe, K. (2008). Central obesity and increased risk of dementia more than three decades later. Neurology, 71(14), 1057-1064.
[15] Tucsek, Z., Toth, P., Sosnowska, D., Gautam, T., Mitschelen, M., Koller, A., ... & Csiszar, A. (2014). Obesity in aging exacerbates blood–brain barrier disruption, neuroinflammation, and oxidative stress in the mouse hippocampus: effects on expression of genes involved in beta-amyloid generation and Alzheimer’s disease. The Journals of Gerontology Series A: Biological Sciences and Medical Sciences, 69(10), 1212-1226.
[16] Alosco, M. L., & Gunstad, J. (2014). The negative effects of obesity and poor physical fitness on cognitive function. In Psychology of Physical Activity: Determinants, Well-being and Interventions (3rd ed., pp. 195-213). Routledge.
[17] Voss, M. W., Carr, L. J., Clark, R., & Weng, T. (2014). Revenge of the “sit”: How lifestyle impacts neuronal and cognitive health through molecular systems that interface energy metabolism with neuronal plasticity. Journal of Neuroscience Research, 92(6), 699-715.
[18] Drewnowski, A., & Almiron-Roig, E. (2010). Human perceptions and preferences for fat-rich foods. In Montmayeur JP, le Coutre J (eds): Fat Detection: Taste, Texture, and Post Ingestive Effects (pp. 265-290). CRC Press/Taylor & Francis.
[19] Kannel, W. B., & Sorlie, P. (1979). Some health benefits of physical activity: The Framingham Study. Archives of internal medicine, 139(8), 857-861.
[20] Donnelly, J. E., Blair, S. N., Jakicic, J. M., Manore, M. M., Rankin, J. W., & Smith, B. K. (2009). American College of Sports Medicine Position Stand: Appropriate physical activity intervention strategies for weight loss and prevention of weight regain for adults. Medicine and Science in Sports and Exercise, 41(2), 459-471.
[21] Westcott, W. L. (2012). Resistance training is medicine: Effects of strength training on health. Current Sports Medicine Reports, 11(4), 209-216.
[22] Bouchard, C., & Tremblay, A. (1990). Genetic influences on the response of body fat and fat distribution to positive and negative energy balances in human identical twins. The Journal of nutrition, 120(Supplement_11), 1505-1512.
[23] Mårin, P., Darin, N., Amemiya, T., Andersson, B., Jern, S., & Björntorp, P. (1992). Cortisol secretion in relation to body fat distribution in obese premenopausal women. Metabolism, 41(8), 882-886.
[24] Leproult, R., & Van Cauter, E. (2010). Role of sleep and sleep loss in hormonal release and metabolism. Endocrine Development, 17, 11-21.
[25] Phillips, S. M., & Van Loon, L. J. (2011). Dietary protein for athletes: From requirements to optimum adaptation. Journal of Sports Sciences, 29(sup1), S29-S38.
[26] Rolls, B. J., Ello-Martin, J. A., & Tohill, B. C. (2004). What can intervention studies tell us about the relationship between fruit and vegetable consumption and weight management? Nutrition Reviews, 62(1), 1-17.
[27] Ludwig, D. S., & Ebbeling, C. B. (2001). Types of dietary fat and the risk of coronary heart disease: a critical review. Journal of the American College of Nutrition, 20(1), 5-19.
[28] Swift, D. L., Johannsen, N. M., Lavie, C. J., Earnest, C. P., & Church, T. S. (2014). The role of exercise and physical activity in weight loss and maintenance. Progress in Cardiovascular Diseases , 56(4), 441-447.
[29] Westcott, W. L. (2012). Resistance training is medicine: effects of strength training on health. Current Sports Medicine Reports, 11(4), 209-216.
[30] Page, P. (2012). Current concepts in muscle stretching for exercise and rehabilitation. International Journal of Sports Physical Therapy, 7(1), 109-119.
[31] Chattu, V. K., Manzar, M. D., Kumary, S., Burman, D., Spence, D. W., & Pandi-Perumal, S. R. (2018). The Global Problem of Insufficient Sleep and Its Serious Public Health Implications. Healthcare, 7(1), 1.