Will how much i sleep affect my weight?

Yes: Sleep deprivation and sleep excess have both been associated with weight gain. Also patients with sleep apnea will secrete a hormone into the blood stream which can increase appetite and cause increased weight gain. Treatment of sleep apnea has been associated with some degree of weight loss as well.

Yes: Plenty of studies have already been done to support the fact that getting less than six hours of sleep a night increases the risk of weight gain and diabetes and that getting more than nine or 10 hours of sleep a night can do the same. The optimum would be somewhere between seven and nine hours sleep for an adult.