Another heart-rate monitor? Not quite. The Garmin’s new Forerunner 210 is not only GPS enabled—so you get real-time pace and distance data—but it’s also equipped with wireless ANT+ technology, which allows you to track your indoor workout numbers from any ANT+-compatible fitness machines. For a list of facilities and brands that offer this equipment visit the Garmin website  ($300: garmin.com).

Optimize water workouts with the Swimsense Performance Monitor. This watch-like device not only automatically detects and tallies your lap total, distance, pace, splits, stroke count and calories burned, but it's also the first monitor that knows whether you're swimming the backstroke, breaststroke, butterfly or freestyle. After your workout, upload your data to a free online training log to track your progress ($200; finisinc.com).

For the ultimate in upper-body support, squeeze into the Lucy Perfect Core Racerback. A mesh compression panel down the front of this comfortably snug tank helps keep abs aligned and reminds you to keep your core tight and engaged during workouts. A built-in bra with molded cups also adds support and helps smooth and shape your figure ($64; lucy.com).

Zobha is known for its ridiculously soft fabric and now select styles are eco-friendly, too. We love the Cowl Neck Hoodie, which is 95 percent Tencel, a fiber made from dissolved wood pulp using an organic spinning process (think bamboo but with fewer chemicals and less post-production waste) ($98; zobha.com).

Whether you want to lose weight, improve your tennis game or complete a marathon, the Adidas miCoach Pacer provides the guidance of a personal trainer without the hefty price tag. Simply strap on the heart rate monitor, attach the stride sensor to your shoes and clip the pictured device to your shirt: A virtual coach will guide you through your workout, telling you when to speed up or slow down so you don't stray from your prescribed heart-rate zone ($140; adidas.com).

Next: The Freshest Spring Gear for Exercisers