I don't know but i don't think it is a good idea.
Not enough for it to be a healthy or efficient means of weight loss.
About 90 calories.
you burn nothing cause your fat
About 450 calories
50
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You don't burn much, but certainly about a good 20 to 50 calories.
10 calories an hour, sugar free gum.
it depends how much you weigh.
Isometric exercise will not burn very many calories. While it does burn some, it is a strength training exercise, whereas something like sit ups or running burns calories.
Light reclining - reading burns 70 calories per hour.
As long as you are familiar with correct technique while doing the exercise, it's very possible to burn 20 calories a minute!!