It is obvious this prompt is a practical one and requires the use of a Calories Tracking app. You are actually required to track what you eat and the activities you do (exercise) to get the correct result.
Once you have entered the amount of food you eat and the nature of activities you do per day along with how long you did them, the app will automatically arrive at an estimate for:
Basal Metabolic Rate is given as:
Men:
BMR = 88.362 + (13.397 x weight in kg) + (4.799 x height in cm) – (5.677 x age in years).
Women:
BMR = 447.593 + (9.247 x weight in kg) + (3.098 x height in cm) – (4.330 x age in years).
They just have to ensure that they gradually reduce the amount of calories they take in per day while maintaining the same amount of physical exertion.
This will make less and fewer calories available for body metabolism and the body will be forced to draw upon stored energy reserves.
When gaining weight, the opposite or the reversal is the case.
Learn more about Calories at:
https://brainly.com/question/11460467
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