Is sufficient sleep help to reduce nightmare?

Nightmares are defined as dreams that bring out strong feelings of fear, terror, distress or anxiety. They feel more vivid or intense than a bad dream, and nightmares are often differentiated from dreams when they cause the sleeper to actually wake up and experience intense feelings upon waking. 

A lot of reasons are associate with this problem. It can be solved by taking some steps. But sufficient sleep is very helpful for this problem. If one can keep his mind always refresh than one can get out from this problem. Any kind of disease have great relation with sleep and physical exercise. So, by making habit of regular exercise one can reduce some of this problem.