Reason 13: To relieve stress

(The list of "31 Days of Reasons" is not in any particular order)

 (source)

Without going all scientific on you - partly because I don't know all the facts - physical activity is a great way to deal with stress, especially since this is the crazy time of year.

Being active - and healthy in general - allows your body to better cope with stress on a chemical (yay to endorphins!) and mental level.

From what I understand (thanks to Dr. Google and Dr. WebMD):

stress = higher level of cortisol
higher levels of cortisol = getting sick

physical activity = less cortisol
physical activity = more endorphins

less cortisol + more endorphins = happier you

I'm on this healthy journey to improve my physical and mental health.