2 of 3 people found the following review helpful
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This review is from: Heart Rate Training (Kindle Edition)
I found this book to be a treasure chest of knowledge concerning the way we should train our bodies if we wish to be fit. I wish that I had access to this 12 years ago when I overtrained and took out my immune system for over a year. This book is a godsend as I embark on a new quest for fitness.