Energy Balance and Body Weight Regulation

Nutrition and metabolism is that body weight change is associated with an imbalance between the energy content of food eaten and energy expended by the body to maintain life and to perform physical work.

“Energy balance” is the relationship between “energy in” (food calories taken into the body through food and drink) and “energy out”. When it comes to “energy out,” the body’s energy needs include the amount of energy required for maintenance at rest, physical activity and movement, and for food digestion, absorption, and transport.

Energy balance also has to do with what’s going on in your cells. When you’re in a positive energy balance (more in than out) and when you’re in a negative energy balance, everything from your metabolism, to your hormonal balance, to your mood is impacted.

calorie restriction or over-consumption without a “metabolic intervention” (such as exercise or drugs) is likely to produce equal losses in lean mass and fat mass with restriction or equal gains in lean mass and fat mass with overfeeding.

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