While its normal to go through bouts of disturbed sleep, if you are routinely waking up groggy over several years your health may be at risk. Insufficient sleep can result in an impact on the immune function and cardiovascular risk. There is also a link between weight gain and reduced sleep. Not only does sleep deprivation, lead to poor health, but it also affects your your concentration, problem solving skills, memory, and mood. Problems with memory, decreased social interaction and difficulty concentrating can all be linked to lack of sleep, not to mention just feeling tired in the mornings.