Sports is good for health, especially for brain
I'm interested in relationship between stress and brain function. Mechanism of brain is very intersting because brain is very accurate organism. When we feel about fear, stress, brain alart to amygdala in brain, then amygdala make signal to hypothalamus then hypothalamus makes singnal to hypophysis ,then hypophysis make signal to adrenal gland then adrenal gland release cortisol which is stress hormone.This route is called "HPA" . Cortisol is circuited via blood around our body then affected many organ including brain. Cortisol is good when emargence situation was happend, but when we continuously feel stress alltime, cortisol level is always high and it is bad for brain, especially for hippocampus which is important for memory. My favorite book " Method of usage of waking up early " said that 3 important issue for health is "sleep 7 hours", "good food" and "good exercise". The author kisou kubota has jogging 3 days