K... I'm back in this thread again... just been sussing out my max as I have been pushing myself harder these last few weeks

According to the calculation 220-age (41) my max shouls be around 179... but I have managed to get my max up to 184 in a race situation recently, sprinting... feeling fairly sick when I finsihed (but I did win the sprint! so it was worth it). I have since pushed myself a few times over 180, so I know it wasn't an annomoly.

My resting heart rate usually sits in the low 40s, but the lowest I have seen it is 39 on a few occasions.

So my range, at 41yrs (and 1 month) is 184bpm-39bpm

Its fascinating to read everyone elses and how you use/interpret this information for your training and racing.