I'm looking for a new HRM - had a Polar M21, but never been very happy with it - dodgy buttons and is now not working after I dropped it (only 1 metre!).
I've heard Cardiosport ones are reliable - I want one for under £100, and I like the Autozone one, but is the way it calculates the 5 Target heart rate zones accurate (via maximum heart rate or age)? I currently use the WHR method, which takes into account resting HR. I liked the "blobs" that came up on my Polar M21 when I had burned 100 kcals. I would like one with interval timers, but think that only the top-range Cardiosport monitors have that.
Also - the size of the watch - I have read that some of the Cardiosport ones are bulky - GraphX, Xtreme & Heartsafe - if you have "skinny wrists" (see http://www.heartratemonitor.co.uk/cardiosport.html
). Are they too big for the average female wrist?!
Does anyone use Cardiosport & can give me some advice? Thanks!