The answer is C. Targeting a particular area for improvement
Specificity principle stated that whatever you do in the gym, should be relevant to your desired outcome
For example, if you are a rowing athlete, it should be best if you focus on upper body training more than lower body because you need your upper body strength more than you need the lower
They can constrict or dilate because their walls are muscular.
It's hard for people to get help for themselves because they are embarrassed or afraid. Many people are scared of being judged or getting rejected so they don't want to get help. If someone asks them if they need help, they might say yes but otherwise, they wouldn't ask unless they know that nothing would happen to them, but even then, they would rather not ask.
