Review: Makes perfect sense!
Rating: 5 out of 5
Date: 02 5, 2013
I learned about intervals last year and incorporated them in my running program. For the first time I was able to do a century in under 5 hrs, so I know they work. Get ready though because they hurt! ....in a good way.I got this book to understand more of why they worked and more tips on how to do them. This book does not dissapoint, I am motivated to keep it up. Very good information! Short and to the point.