In an endothermic reaction, the opposite happens. In this reaction, heat is absorbed. Or more exactly, heat is required to complete the reaction. Photosynthesis in plants is a chemical endothermic reaction. In this process, the chloroplasts in the leaves absorb the sunlight.
Martial arts. Martial arts are codified systems and traditions of combat practices, which are practiced for a number of reasons: as self-defense, military and law enforcement applications, mental and spiritual development; as well as entertainment and the preservation of a nation's intangible cultural heritage.
Felmet (1998) studied the effects of martial arts training on concentration and impulsivity in children ages 7-12 and found significant behavioral improvement. According to Trulson (1986), martial arts also help practitioners manage depression and anxiety, both of which are comorbid disorders of ADHD. Researchers have distinguished between traditional and modern martial arts, which differ in training modality and environment, as well as instructional style.