I've used a FR230 for a couple of years and picked up a HRM-Run last week to use with it. I've only used the HRM-Runt twice and on both occasions it gave me a training effect of 'over reaching'. 6 miles at 9.15 pace and 155 hr av HR and this morning it was 4.88 miles at 10.38 pace chatting at av HR of 144. Admittedly I'm coming back after a couple of months off but both runs felt ok. I'm 55 and have been running recreationally for five years or so. Do I need to keep using it to get more accurate readings or am I just a crock?
Thanks in advance,
Mark.