My favorite cross-training activity is swimming, and Garmin’s new 910 is a great training tool in the pool and out. It tracks distance, counts strokes and laps and measures stroke efficiency. On the slopes, the road or single track, it provides elevation, speed, distance and heart rate data. And, because it’s a Garmin, you can upload all of your data to track and record your workouts and ski days online. $400; garmin.com. --Deb Williams, Senior Editor