Does Excessive sleep affect Metabolism

If you are planning to go on a Himalayan trek or participate in a Triathlon or just plain join a gym the first activity that your trainer will ask you to do is check your BMI i.e. Body MassIndex so that they can tailor your regime based on that BMI parameter.BMIshows body fat percentage and helps identify health risks (if any).A BMI ratebetween 18.5 to 25 is considered healthy and therefore a person whose BMI falls in this range will burn more calories during rest and active state as compared to a person with higher BMI. In short,an increase in BMI increases the probability of contracting health issues such as Diabetes, BP, and Heart problem.