Expends energy, creating an energy deficit. Physical activity creates a calorie deficit, making it useful for weight control. Exercise prevents a reduction in metabolic rate that normally occurs when sedentary (non-exercising) individuals lose weight by dieting alone.
Improves body composition, especially a reduction in visceral fat (belly fat), even if there is minimal change in body weight. Aerobic exercise is the best technique to burn off that gut fat.
Improves sensitivity of the physiological satiety system. In other words, exercise trains your body to get better at telling you when you’ve eaten enough. It helps regulate your appetite.
Helps reduce food cravings in most individuals.
Reduces stress and anxiety. Regular physical activity increases our ability to handle stress. It enhances the body’s ability to respond to physiological challenges, thus creating a buffer against the toxic effects of chronic stress.
Staves off food addiction. Exercise causes changes in our brain and body’s chemical systems, increasing dopamine levels in brain regions associated with addictive disorders and improving executive function and inhibition.
Improves mood; prevents and treats depression. Research shows that even a single “dose” of exercise can increase positive emotions relating to subjective well-being and vigor.
Improves sleep quality.
Improves overall brain health.
The question should probably be “Why wouldn’t I exercise?”
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