I'm a runner. I've been using a Garmin with GPS to track my runs, which I enjoy. I have issues with the chest strap, though. (Not just Garmin's.) I find chest straps to be very uncomfortable to wear; they get stuck under the band of my bra and chafe, or they twist, or they slip. It doesn't matter how well-adjusted it is, I just don't like them.
I've tried the FitBit and a few other gadgets, but they estimate calorie burn based on weight and age.
Is there such a thing as an accurate heart rate monitor that doesn't use a chest strap? I know there are some watches that have sensors that sit against your wrist pulse. Are these anywhere close to accurate?
Note that I'm not looking for continuous monitoring; I only want an HRM to use during exercise.