Like stretching, cooling down after a run has long been accepted as a best practice. Isn’t it a good idea to gradually reduce your heart rate with 5-10 minutes of light jogging? Doesn’t a cooldown help reduce post-exercise muscle soreness? Doesn’t a gradual shift from running to non-exercise help speed recovery? Isn’t it bad for your heart to just stop running with no gradual transition to non-exercise?
Kelly O'Mara 
Like stretching, cooling down after a run has long been accepted as a best practice. Isn’t it a good idea to gradually reduce your heart rate with 5-10 minutes of light jogging? Doesn’t a cooldown help reduce post-exercise muscle soreness? Doesn’t a gradual shift from running to non-exercise help speed recovery? Isn’t it bad for your heart to just stop running with no gradual transition to non-exercise?