Skinnys exercising?

Question

Do skinny, unfit people burn the same amount of calories as skinny fit people when they exercise equal amounts?

Answer 1

not even close, less muscle mass means less biologically active tissue that performs work and burns energy.

here is an example:

100 lb woman @ 25 % body fat has 75 lbs of non-fat (muscle)
200 lb woman @ 50% body fat has 100 lbs of non-fat

a 100 lb woman performing cardio on the treadmill for 30 minutes on level 4 with no incline will burn substantially less calories than a 200 lb woman performing the same workout.

the 200 lb woman will have a higher BMR than the lighter woman and burn more calories during exercise due to the 25 lbs of additional muscle mass that her body has to support.

Answer 2

no, because people who have been building up their endurance and working out alot have been building muscle. the more muscle you have, the more calories you burn in a day at rest. If you work out the same, you may burn just as many calories but in a day, they typically will be burning more since they have more muscle built up.