I am having problems picking up my HR with my good old s625x watch.
I can get a reading sometimes after about 15 minutes of messing with my WearLink 31 strap. Once I get the signal it is okay. Yesterday I gave up trying and ran without it.
I bought a new WearLink 31 and things have not improved. I often get a reading of 220 or nothing at all.
I have noticed when I am getting a signal on my watch I also get a signal on the exercise bike at my local gym. When I am not getting a signal on my watch I do not get a signal on the exercise bike.
Could this all be because there is too much fat between my WearLink 31 and my heart?
I do not have any problems with a Gramin 305 but I love my s625x.