be careful. I bought one, it needed two hands to use!
Well, that would not work riding a bike... but would be OK for running I suppose.
IF they actually read your HR accurately.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"