To Progress Safely and Improve Fitness, It Is Recommended That

To progress safely and improve fitness, it is recommended that you

A) increase overload frequency by no more than 20% each time you make changes in your program.
B) increase overload frequency and intensity by 20% each time you make changes in your program.
C) increase overload intensity and duration by 10% each time you make changes in your program.
D) increase overload frequency, intensity, or duration by no more than 10% each time you make changes in your program.