Garmin is releasing the 310XT, an update to its 305 workout watch.
The 310XT has a built-in GPS receiver and an optional heart-rate monitor. It is waterproof to about 150 feet, which means it can take part in the swimming portion of a triathlon.
This newer model has improved calorie-consumption measurement software and has a “virtual partner,” a program that simulates running with — or against — a partner of similar fitness and speed.
The watch can beam exercise information wirelessly to your computer, allowing you to map workouts on a Mac or PC. A built-in technology captures your location even when you’re not in sight of a GPS satellite, ensuring an accurate measurement while running under trees or between skyscrapers.
The 310XT, which should be available in late spring or early summer, will cost $350 ($400 with heart monitor). — John Biggs
