"He also has a very good point in how exercise can make you so hungry that you will overconsume calories. Many on this forum have experienced exactly this when doing very strenuous (metabolic) workouts"
My experiences have shown the opposite effect. The majority of my clients generally eat less when conductiong strenuous workouts. I eat less when a train hard.
A study conducted by Erdmann et. al. (2007) investigated the effect of exercise intensity and duration on ghrelin (ghrelin is produced primarily in the stomach- it has been shown to increase appetite and food intake) release and subsequent ad libitum food intake. Bicycle exercise on an ergometer for 30 min at 50 W which was below the aerobic-anaerobic threshold led to an increase of ghrelin which remained unchanged during the higher intensity at 100 W. In a second group 7 subjects cycled at 50 W for 30, 60 and 120 min. Ghrelin concentrations rose significantly above baseline for the respective periods of exercise. The researchers concluded that low rather than high-intensity exercise stimulates ghrelin levels independent of exercise duration.
The following is an excerpt from Freedman MR, King J, Kennedy E (2001) Popular diets: A scientific review. Obesity Research 9(S1): 1–40.): “Many factors influence hunger, appetite, and subsequent food intake. Macronutrient content of the diet is one, and it may not be most important. Neurochemical factors (e.g. serotonin, endorphins, dopamine, and hypothalamic neuropeptide transmitters), gastric signals (e.g. peptides and stomach distention), hedonistic qualities of food (e.g. taste, texture, smell), genetic, environmental (e.g. food availability, cost, and cultural norms), and emotional factors (e.g. eating when bored, depressed, stressed, or happy) must be considered. These parameters influence appetite primarily on a meal-to-meal basis. However, long-term body weight regulation seems to be controlled by hormonal signals from the endocrine pancreas and adipose tissue, (i.e. insulin and leptin).”
coach hale
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