Our immune system defends us from familiar or weak germs.
Angina, I believe. It's around the brain
Answer:
Progressive overload
Explanation:
Progressive overload involves is a type of training that involves working the muscles in a continuous and consistent manner to achieve increased strength and endurance.
This is done by application of trainings such as tempo runs which subjects the body to how long it can endure certain strenuous conditions and to try to improve on them.