Sleep is considered one of the vital signs and has become an important public health issue in our society. Thus, sleep impacts on overall health and, conversely, certain common medical conditions can impair sleep. Emerging evidence, in conjunction with clinical experience, demonstrates that physical therapy improves several sleep disorders and also optimized sleep contributes to boost rehabilitation. As health care professionals, physical therapists are singularly concerned with well-being and need to be competent to instruct their patients to rest and sleep.