Editing Human nutrition (section)

=== Sports nutrition ===
{{Main|Sports nutrition}}

The protein requirement for each individual differs, as do opinions about whether and to what extent physically active people require more protein. The 2005 [[Recommended Dietary Allowance]]s (RDA), aimed at the general healthy adult population, provide for an intake of 0.8 grams of protein per kilogram of body weight.<ref name="DRI" /> A review panel stating that "no additional dietary protein is suggested for healthy adults undertaking resistance or endurance exercise".<ref>{{cite book | last=Di Pasquale | first=Mauro G. | title=Sports Nutrition: Energy metabolism and exercise | editor=Ira Wolinsky, Judy A. Driskell | publisher=CRC Press | year=2008 | page=73 | chapter=Utilization of Proteins in Energy Metabolism | author-link=Mauro Di Pasquale | isbn=978-0-8493-7950-5}}</ref>

The main fuel used by the body during exercise is carbohydrates, which is stored in muscle as glycogen&nbsp;– a form of sugar. During exercise, muscle glycogen reserves can be used up, especially when activities last longer than 90&nbsp;min.<ref>{{Cite web | url=http://www.extension.iastate.edu/humansciences/content/carbohydrate | title=Iowa State University: Extension and outreach | access-date=2015-04-16 | archive-date=2015-04-19 | archive-url=https://web.archive.org/web/20150419024429/http://www.extension.iastate.edu/humansciences/content/carbohydrate | url-status=dead}}</ref>