We just started a series of infographics explaining how to train according to heart rate. It's definitely worth reading for every running rookie. Yo can grab your own pdf-copies and this way collect a whole handbook. (Free, no email asked)
https://blog.sportlyzer.com/magic-of-heart-rate-exercising-and-cardiovascular-system/
Open Air addict and hobby runner
Half Marathon 1:43 (Nov 6 '11)
Coached by a virtual coach at sportlyzer.com