Calories Burned

geminigemz90

Why I'm not burning more calories doing HIIT Workouts, am I getting lean which means burning less calories.

bpetrosky

Nope.

Morgaath

Maybe this will help:
1 liter of muscle weighs 1.06kg (2.30lbs) -- 1.06 g/mL
1 liter of fat weighs 0.90kg (1.98lbs) -- 0.9 g/mL
1 liter of water weighs 1.00kg (2.20lbs) -- 1 g/mL (So fat floats, muscle sinks)

1lb of fat uses 2-3cals per day just as a normal part of functioning.
1lb of muscle burns 7-10cals per day just as a normal part of functioning.

So, two guys who weigh 180lbs, each the same height, one has 15% bodyfat, the other 30%. The guy with less body fat burns more cals while they sit in the back of a car for a 4hr trip across the state.

Also means that if you lose 10lbs of fat, and keep the same amount of muscle, you will burn less cals while sitting on your butt (because there is less of you), and less cals while running a mile (Because there is less of you to be hauled around).