You might think you’re beating weight loss by cutting back on calories. But, when you cut out too many, your metabolism begins to slow and puts your body into ‘starvation mode’. Instead of burning off calories your body stores the fat and uses lean tissue or muscle to provide it with the calories it needs. The result? Your muscle mass begins to decrease, which results in a lower metabolic rate and you have less physical energy to do anything. Women should aim for a 1,200 calorie diet and should try to eat a meal every three to four hours.