If a man reduces his calorie intake from 2600 to 1500 calories per day, approximately how much weight will he lose in one week?

To determine how much weight a man would lose by reducing his calorie intake from 2600 to 1500 calories per day, it's helpful to start by calculating the daily calorie deficit created by this change.

The man initially consumes 2600 calories. By reducing his intake to 1500 calories, he creates a daily deficit of 1100 calories (2600 - 1500 = 1100). Over the course of a week (7 days), this deficit accumulates to a total of 7700 calories (1100 calories/day * 7 days = 7700 calories).

It is generally accepted that losing approximately 0.45 kg (1 pound) of body weight requires a deficit of about 3500 calories. Therefore, to find out how much weight he can lose with a total deficit of 7700 calories, the following calculation can be made:

7700 calories ÷ 3500 calories/pound ≈ 2.2 pounds.

Since 1 kg is equivalent to about 2.2 pounds, dividing by this conversion factor shows that he could feasibly lose just shy of 1 kg per week—around 1 kg to be more exact.

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