Anybody care to comment on how accurate (or inaccurate) the built-in HRM optical on the Garmin 945 is? Perhaps compared. to the data acquired by a HRM-swim strap if you have one?
I never thought I'd care about HRM in the pool, but I've been incidentally looking at my swim data from my past few pool swims and am somewhat intrigued in that the HR data from the built in optical 945 sensor seems to look very plausible, although admittedly I definitely have NOT checked it for accuracy. It just seems to go up into in or near my run/bike Z3 HR when I'm doing 'Z3 effort' intervals in the pool, and seems to track decently well with what my swim pace is.
I never thought I'd care about HRM in the pool, but I've been incidentally looking at my swim data from my past few pool swims and am somewhat intrigued in that the HR data from the built in optical 945 sensor seems to look very plausible, although admittedly I definitely have NOT checked it for accuracy. It just seems to go up into in or near my run/bike Z3 HR when I'm doing 'Z3 effort' intervals in the pool, and seems to track decently well with what my swim pace is.