Why is it important to develop your own fitness program and not just use one developed for someone else ?

It important to develop your own fitness program and not just use one developed for someone else because everyone's needs, limits, and capacities are different from the rest according to their age and body type.

Explanation:

Starting a fitness program is one of the best thing a person can do for his/her health. Being physically fit helps a person in a lot many ways. But while engaging in any fitness program, it is necessary that a person develop his own fitness program and not just blindly follow others fitness program. Every person is unique in its own way and they all have their own needs and capacity. A fitness plan meant for a middle aged man wouldn't be suitable for a teen girl.

This is mainly because the stamina, capacity, and the food consumption level of a man would definitely be quite more as compared to a teenage girl. So the limit to perform the fitness activities of a man will also be more compared with that of a girl.

the answer:

in the first part of the story running is all that matters to squeaky. running gives her confidence and defines who she is. at the beginning of the story she says that other kids call her mercury because she runs very fast. in the text she refers to herself as "miss quicksilver".

the line that provides the best evidence that squeaky has self-confidence is

" and i continue with my breathing exercise, strolling down broadway toward the ice cream man on 145th with not a care in the world cause i am miss quicksilver herself".