I tried the new TomTom Spark and experienced poor performance from the watch. I’m not saying your’s isn’t working well for you. However, for myself, and most others who have tested it against multiple other HR devices, they have found the TomTom HR wrist sensor to provide bad data during weightlifting and other indoor…

Testing with this watch has shown the wrist sensor does not update to quick changes in HR as fast as the chest strap. However, having the HR information gathered all day and night long is very helpful. For most athletes using this watch they’re going to use the chest strap as well, during most workouts, because the…

While the Apple and Moto 360 are fine watches, they don’t track all the information that is needed for high level athletes. If you get to the point that you need the Fenix 3, it becomes quite clear what the differences are.