Creatine is one of the most researched food supplements with experimentation dating as far back as the 1970s when it was tested for its ability to improve performance as part of sports nutrition. Since 1990, creatine has been used for sports nutrition by many athletes in the form of creatine monohydrate for muscle building and for explosive strength. Creatine can also be taken for high-intensity sporting activities, such as weight training, martial arts, sprints and track and field athletics, as the muscles tire quickly during these types of sporting activities and taking creatine before and/or after training counteracts this fatigue. But creatine can do much more. It can also help during endurance sports such as marathons, swimming and cross-country skiing.