Having a bit of difficulty establishing 'correct' heart rate zones on a Garmin Edge 500 (5 zones available). As is usual with the internets, there is a wealth of conflicting advice out there. Garmin suggest zone 1 starting as low as 50% of MaxHR which seems to contradict the majority of sources that place the start of zone 1 at around 60%. Garmin's own manual cites the five zones as being 50, 60, 70, 80 & 90% of MaxHR, which seems oversimplified.
Anyone have any advice on percentage values? Thanks!