Final answer:
Factors that promote growth, enhance muscle tone, and reduce body fat include regular physical activity, balanced nutrition, and growth hormone activity. Exercise not only burns calories but also builds leaner muscles, increasing the basal metabolic rate, while growth hormone assists in protein synthesis and fat breakdown.
Step-by-step explanation:
Factors that help increase growth, improve muscle tone, and decrease body fat include engaging in regular physical activity, proper nutrition, and the role of certain hormones like growth hormone (GH). Engaging in at least 30 minutes of physical activity most days of the week contributes to not only burning calories but also to building lean tissue, which in turn raises your basal metabolic rate (BMR), allowing more calories to be burnt even at rest. Growth hormone, which is produced by the anterior pituitary gland, plays a crucial role by stimulating protein synthesis, enhancing amino acid uptake by cells, and promoting lipolysis, which accelerates the mobilization of fat from adipose tissue.
Moreover, growth hormone stimulates the production of insulin-like growth factors (IGFs) that induce body growth and a higher metabolic rate. Exercise also provides nutrients and oxygen necessary for muscle contraction, helps remove lactic acid, and contributes to overall cardiovascular health, thereby preventing atherosclerosis. In addition, nutrients play a pivotal role by being used in energy and amino acid metabolism, fat synthesis, and fat breakdown, helping the body use blood sugar effectively.