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…it’s in the details! Learn How to Become an Efficient (and FAST!) Runner in this post by Endurance Running Coach SARAH SEADS!

Now that you have ready Part 1 and have an understanding of how the body creates energy it is time to look at how you can tailor your training sessions to make these energy systems stronger...