Previously I've always set out to run as fast as I could for whatever distance I happened to be running that day. This year I had the benefit of a coach who was adamant about keeping to the specified zones and paces even when some sessions felt ridiculously easy. At first I was a bit sceptical but I really felt improvements. Jack Daniels will explain more than you ever needed to know about the science of how and why the different zones work.
You need some Jack Daniels.
Previously I've always set out to run as fast as I could for whatever distance I happened to be running that day. This year I had the benefit of a coach who was adamant about keeping to the specified zones and paces even when some sessions felt ridiculously easy. At first I was a bit sceptical but I really felt improvements. Jack Daniels will explain more than you ever needed to know about the science of how and why the different zones work.