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What It Does: Tracks heart rate, speed and calories burned (optional). Plus the GPS feature has an optional map display that lets you view your path, save your locations and create and save favorite routes.
What It Doesn’t Do: Fit easily under layers of clothing or gloves. It’s slightly bulkier and heavier than other wrist units.
What It Includes: Chest strap with heart-rate transmitter, GPS-enabled wrist unit, Garmin Training System program for PCs.
Why We Love It: The Garmin integrates its GPS into the wrist unit, other systems put the GPS in a separate device- cutting down the number of gadgets you have to wear.
What It Costs: $323.
Where To Get It: garmin.com
What It Does: Displays and keeps a log of your workout or ski day specs, including speed, distance traveled and heart rate, and can display a weekly summary on the wrist unit.
What It Doesn’t Do: Tell you where you¿re going. Unlike some other models, it doesn¿t have a compass.
What It Includes: Chest strap with heart-rate transmitter, wrist unit, GPS, Protrainer 5 software for PCs.
Why We Love It: Polar has partnered with apparel companies such as Adidas and Numetrex that now make women’s sports bras and men¿s tops (sold separately) that integrate the transmitter device, eliminating the need to wear a separate chest strap.
What It Costs: $500.
Where To Get It: polarusa.com
What It Does: In GPS-mode, it displays altitude and elevation, including vertical speed and distance. A hands-free mode logs split times, and the monitor displays target heart-rate zones, average heart rate, recovery time and percent-of-max heart rate.
What It Doesn’t Do: Computer analysis. However, Timex sells the Data Recorder2 device that includes the Timex Trainer software ($75).
What It Includes: Chest strap with heart-rate transmitter, wrist unit, GPS with belt clip and armband.
Why We Love It: Versatility. Wear the unit as an everyday sport watch when you aren’t skiing with the heart-rate transmitter and GPS.
What It Costs: $300.
Where To Get It: timex.com