I first started getting TE data with my FR610 which I took with a "grain of salt" but it seemed broadly consistent with the perceived effort. The same can be said for the TE given by the FR235 (even with the oHR) and when I got it I'd checked that it was always very close to the FR610. Now that I've been using the F5 for a week I'm finding TE data to be rather "inconsistent".
I've noticed that the aerobic effect is always higher than on the FR235, by very little on very easy runs but then it ramps up as they get harder and today for a 16k session at Marathon Pace at 81% of MaxHR, I got a 5.0 vs 4.5 on the FR235. Sure it's a hard session but in no way is it worth a 5.0/Overreaching at that % of MaxHR.
Anyone else noticed these oddities ?