SAID principle
{{Short description|Principle in physical training}}
In physical rehabilitation and sports training, the SAID principle asserts that the human body adapts specifically to imposed demands.{{Cite web |title=Answers - The Most Trusted Place for Answering Life's Questions |url=http://www.answers.com/topic/said-principle |url-status=dead |archive-url=https://web.archive.org/web/20180710195601/http://www.answers.com/topic/said-principle |archive-date=10 July 2018 |access-date=10 July 2018 |website=Answers.com}} It demonstrates that, given stressors on the human system, there will be a Specific Adaptation to Imposed Demands (SAID).{{Cite web |title=Strength Training |url=http://coachsci.sdsu.edu/csa/vol21/sale.htm |access-date=10 July 2018 |website=Coachsci.sdsu.edu}} For example, by only doing pull-ups on the same regular pull-up bar, the body becomes adapted to this specific physical demand, but not necessarily to other climbing patterns or environments.
In 1958, Berkeley Professor of Physical Education Franklin M. Henry proposed the "Specificity Hypothesis of Motor Learning".{{Citation needed|date=October 2022}}