Heart rate training / the link

Where can you find "Efficient Heart Rate Training" ?

I'm a slacker.

Sorry, but it's true. I am. I announce things and then I forget to talk about them when they are released.

So, to repair things : I did write a few months ago a book on heart rate training that's avaialble on iBooks and Kindle.

If you're on a mac, an iPhone or an iPhone, you can use this link to review and buy the book in iBooks.

If you have a kindle or prefer Amazon, you can use this link.

Both of them are affiliate links, but given the price of thes book, I don't expect to retire tomorrow ;-)