So - my Garmin heart rate monitor has decided to (possibly) die on me two days before a race. Symptoms: out of the blue, it figures that I'm in high Z5 / Z6 during a run or a bike ride - despite effort level being nowhere near these levels - and stays there for some time. Interestingly, it seems like it simply adds a fixed (?) number to my actual heart rate, as it reacts up/down depending on effort level. As a result, I get situations like this one: http://www.strava.com/activities/186699228
Has anyone had these issues?
My thinking:
- Battery running flat and causing problems - not the case, I've just changed it and it hasn't helped
- Strap is buggered and needs replacing - low cost problem
- HRM unit is buggered and needs replacing - higher cost problem
- 910xt itself is buggered and needs replacing - actually not that expensive, but it would be my fourth (sic!) unit...
Thoughts?
Might pop out to Evans / Sigma tomorrow and see if I can buy a new strap / HRM - otherwise the Vit will need to be ridden / run on RPE...