Short rests are periods of rest or sleep that are shorter than a full night's sleep. The term 'short rests' can refer to two different types of rest: NAPS and CATNAPS. NAPS are short periods of sleep during the day, usually lasting between 15 minutes and 2 hours. CATNAPS are even shorter periods of sleep, usually lasting only a few minutes. Both NAPS and CATNAPS are beneficial for providing a quick burst of energy and helping to improve alertness and focus.