Simply wet

The weather forecast was spot on, 95% chance of rain and it was. Anyway I was out of the house so committed to my usual 13km cruise to Oxstones. When I first bought the Garmin HRM-Tri I was interested in the R/L contact balance especially as I was always lop-sided. Then I forgot about it and noted that I was drifting closer to 50:50. Today's run is interesting in that I averaged 50:50 but started off to one side and moved across to the other.

If I'd been on a cambered road and gone 'there and back' it would be easy to explain. On a trail run where I was running around puddles it's hard to explain other than by linking to fatigue (or that the device simply drifts as it changes temperature and is thus useless?).