Do you cool down after a workout?

Well you should if you want to improve your performance.  After an intense cardio workout (think intervals or hills, as an example, the cool down has been shown to improve recovery by metabolizing lactic acid thereby allowing you to store carbohydrate as glycogen sooner.  So don’t skip that cool down if you want to improve recovery and enhance recovery; continue to work around 60% of your max HR for another 10-15 minutes!