Recently some studies have been influenced by an evolutionary psychology perspective. This includes studies on testosterone changes in sports which at least for males are similar to those in status conflicts in non-human primates with testosterone levels increasing and decreasing as an individual's status changes. A decreased testosterone level may decrease dominant and competitive behaviors which when the status conflicts involved fighting may have been important for preventing physical injury to the loser as further competition is avoided. Testosterone levels also increase before sports competitions, in particular if the event is perceived as real challenge as compared to not being important. Testosterone may also be involved in the home advantage effect which has similarities to animal defense of their home territory. In some sports there is a marked overrepresentation of left-handedness which has similarities to left-handed likely having an advantage in close combat which may have evolutionary explanations.
The link between exercise and psychology has long been recognized. In 1899, William James discussed the importance of exercise, writing it was needed to "furnish the background of sanity, serenity...and make us good-humored and easy of approach." Other researchers noted the connection between exercise and depression, concluding a moderate amount of exercise was more helpful than no exercise in symptom improvement. Additionally, meeting exercise requirements can also aid in alleviating symptoms of avoidance disorders and anxiety, while also providing a higher quality of life for the patient in terms of physical health. 
Criticism — A tenet of motivational theory that is necessary to improve performance. The proper delivery of that criticism is imperative, as criticism can either better performance or drastically worsen it. There are three types of criticism: Destructive, Self, and Constructive. The best method of delivering constructive criticism is the "sandwich" approach; here, one first offers a compliment, then offers and critical feedback and useful directions to improve in that particular area, and then end with another compliment.
Although there are different techniques, clinical hypnotherapy is generally performed in a calm, therapeutic environment. The therapist will guide you into a relaxed, focused state and ask you to think about experiences and situations in positive ways that can help you change the way you think and behave. Unlike some dramatic portrayals of hypnosis in movies, books, or on stage, you will not be unconscious, asleep, or in any way out of control of yourself. You will hear the therapist’s suggestions, but it is up to you to decide whether or not to act on them.