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A training principle that states that in order for adaptation to occur, a greater than normal stress or load on the body is required for training adaptation to take place.[1] This is done by increasing any parameter of fitness to make the muscles work harder than they are accustomed to (overload). [2][3] "For improvement and adaptation to occur the training should be at an intensity where the individual feels some kind of stress and discomfort." [4]

See Also[]


  1. Quinn, Elizabeth (n.d.). Exercise Science - The Science Behind Your Workout. Retrieved on 2008-10-01.
  2. Donche, Dan (2008). FF Trainer Certification Guide. USA: Fatal Fitness. 
  3. Hatfield, Frederick C. (n.d.). Bodybuilding According to Joe Weider. Retrieved on 2008-08-11.
  4. unknown (n.d.). Glossary of Terms. Retrieved on 2008-08-11.