OK - it was a dull day at work today but... if the Heart Rate reflects the need for pumping oxygen to your muscles - then stands to reason (well to me anyway)that it's also going to reflect your rate of respiration - or maybe even it's the other way round. Well they must be related to each other some way, surely? And maybe how they change relative to each other comparing a resting and a flat out effort could give an indication as to what your best distance should be ?
So in the interests of non - scientific surveys, here goes for me - measured over a full minute at work - and for a full minute of 'gasping' immediately after running for 9 minutes flat out at 98-100% all the way (max HR reached used).
Feel free to add yours in and maybe a pattern will emerge
a) Comotose at Desk 9:59 ie 1:6.55
b) After Flat Out Run 66:206 ie 1:3.12
c) Best Distance ? n/k but probably very short