Whether it is your first 10k, faster 21k or an ultra adventure, the key to your success in endurance training and racing is not simply adding more miles. Nope. The key, to moving faster and further without as much fatigue is training your body to become:
ef·fi·cient
əˈfiSHənt/
adjective
adjective: efficient
(especially of a system or machine) achieving maximum productivity with
