REMEMBER THE DAYS when heart rate monitors were huge, clunky weights on your wrist? Or the days when you had to strap a GPS unit to your arm or clip it to your belt, then sync the info with your watch? Those days are long, long gone – as you can see from the three mini-computers that are not much bigger than a regular watch. And, to top it off, you’ll get more training data from these sport watches than you might want, but it’s great to have the options. Being able to download your data from these sport watches is now pretty much a given – all three of the manufacturers’ products we look at in this review offer excellent software that will allow you to download all your information, often without having to plug the watch into anything. a compass to keep your bearings, distance and stroke frequency in the water, power, distance, speed on the bike and even ground contact time, stride length and cadence while you’re running. In addition to even more training and race data that’s available, the 935 will evaluate your training status and let you know if you’re undertraining or overdoing it. The multisport mode even allows you to switch from sport to sport, perfect for brick workouts or races. Somehow all this is possible with a crazy amount of battery life – two weeks in watch mode and up to 24 hours in GPS mode. The Tri-bundle includes two HRM straps – one for the water and one to gather additional run data, as well as two extra watch straps.