Principles of progression
As you work harder your body adapts. Must increase amount of work for improvement to occur
F
Frequency. Exercising three days per week is a minimum to see any gain
I
Intensity. Should be increased enough to demand more effort than usual
T
Time. As the time is increased intensity is decreased
Principle of specificity
Specific exercises improve specific components
Principles of overload
Body will become stronger and function better if increased overload are placed on them