One pound of fat in seven days is a lot of pounds per week.
3,500 kcal equal 1 lb: This generalisation should no longer be used, according to the consensus panel, as it is an unreliable indicator of weight change. The 3,500 kcal/lb rule is based on the incorrect assumption that human weight fluctuates linearly over extended periods of time.
3,436 to 3,752 calories can be found in a pound of body fat. It is a misconception, nevertheless, that eating merely 500 fewer calories per day (or 3,500 calories per week) will result in a one-pound weight loss. The body will quickly adapt to this, causing you to burn fewer calories in the near run, even if it could initially work.
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