Hormones are the body's chemicals in regulating many of its functions (i.e., muscle repair, growth, recovery). If you decide to try one of the latest extreme diets hyped by the media, your hormones will pay the price. For example, many of the growth-supporting hormones will plummet, causing a loss of muscle mass. This is the insidious part of dieting: you'll lose body weight but most of the weight will most likely be from muscle loss rather than bodyfat. In essence, you'll become a smaller but fatter person! Dieting is generally not a healthy way to lose weight as, in most cases, bodyweight is dropped too quickly, resulting in muscle loss (not fat loss). In addition, thyroid function decreases, testosterone levels drop, the immune system becomes compromised, and leptin levels become reduced. All of these hormonal effects have a negative impact on the body.
The thyroid hormone helps to regulate the amount of calories your body burns daily. It also impacts muscle growth by either speeding up or slowing down protein synthesis. Dieting will cause your thyroid hormone levels to decrease which slows down the calorie-burning process. In essence, your body will become less efficient at burning bodyfat as your metabolic rate decreases due to the reduction in caloric intake.
Testosterone declines when caloric intake decreases. Muscle growth is negatively affected when testosterone levels drop. If you want to hold on to your muscle mass, this is the worst situation to be in. In addition, the fat burning process is also reduced when testosterone levels decrease.
The immune system becomes impaired when over-dieting occurs. A weakened immune system will negatively affect your body's ability to hold on to muscle mass. Cortisol levels will increase due to the stress of a weakened immune system, causing catabolization or the tearing down of muscle tissue. Insulin resistance increases under these circumstances, increasing the likelihood that bodyfat will be stored rather than burned.
Leptin, a hormone which helps to regulate your body weight, declines when dieting occurs. The result: a craving for more food and therefore increased caloric intake and a decrease in metabolic rate, making it more difficult to shed bodyfat.
Instead of extreme dieting, consider the following instead:
Brian Danley, CFT
"Motivation is what gets you started. Habit is what keeps you going."
Brian Danley, CFT "Motivation is what gets you started. Habit is what keeps you going." 408-688-1586 (cell) briandanleyfitness.com https://www.linkedin.com/in/briandanleyfitness https://www.facebook.com/BrianDanleyFitness
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I'm a personal trainer who loves to help others fulfill their health and fitness goals. I consider myself a bodybuilder in that I live the lifestyle of eating healthy food, working out regularly, and sculpting my body.