No it is not possible to gain weight by just sleeping on your back.
Yes, because the more you sleep, or the less you gain weight
No thats just silly.
No, sleeping sitting up will not make you lose weight. When you are asleep your body functions slow down as you are not using any energy and your body goes into 'repair mode'. Sleeping sitting up can cause injury therefore preventing you from exercising when you wake up. This means that sleeping sitting up can actually have a reverse effect and cause you to gain weight through lack of exercise.
increase in appetite difficulty sleeping changes in mood and behaviour flushing (redness) of the face short-term weight gain
does cherry gain weight
Yes you do gain weight.
Weight Gain Is a common side effect of Insulin
While people with chlamydia may gain weight, chlamydia does not itself cause weight gain.
You mostly gain weight by not eatting healthy and not exercising
no it can make you gain weight!
yes it does cause weight gain!