Progression - Training should always progress/move on in some way after a period of time, after physiological adaptation has occured. This may be increasing the training intensity, duration or complexity. Progression should be gradual.

Reversibility/Regression - Training benefits are lost with time after training stops. Generally, the longer a period of time spent training then the benefits remain longer. After a long period of training it easier to do a little exercise to maintain fitness than if exercise had just been taken up. Use it or lose it!

Rest - To enable time for physiological, neuromuscular and psychomotor changes to take place after training, a rest is needed to allow energy and nutrients to be directed to the site(s) where the biological building is taking place. Know when to stop!