BRAINIEST PLUS 100 POINTS TO ANSWERER WHO ANSWERS WITH THE CORRECT ANSWER IN THE NEXT 5 MINUTES!! How many times should you review your fitness plan?

4

None

1-2

3

3 is the correct answer. You should change up parts of your fitness plan every 3 weeks depending on your experience level and the time of year.

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)

True your body needs vitamins such as protein, vitamin d, fish oil etc