How does stress relaxation contribute to PNF? Stress relaxation is when the body stretches until it is not able to any longer.
Stress relaxation is an example of PNF.
Stress relaxation helps the body to continually contract to keep it safe.
Stress relaxation allows the body to stretch beyond normal extent under stressed conditions.

Stress relaxation decreases the force generated by the viscous material when it resists the elongation stimulus that stretching causes within the MTU.

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.