Factors that can influence flexibility include
-breathing
- climate
-prosture

Explanation:

Posture is defined as the position in which a person holds his or her body while walking, standing or sitting.

This position can influence the flexibility of the body, improving it or deteriorating it. For example, if a person holds a not correct position, that is, if that person is curving his bag all the time, then those muscles will lose some flexibility, making harder to correct that posture.

Therefore, the right answer is Posture.

treatments and vaccines : )

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.