Whether you're training for a tri, making a commitment to getting healthy, or just working on getting ready for summer, Garmin's Index Smart Scale makes sticking to your plan a whole lot easier. It does all the classic scale things: weighing in pounds, kilograms, and even stone. It also tracks body mass index, body fat percentage, bone mass, and skeletal muscle mass, all of which are important data points for high-level athletes. The Index can recognize and remember up to 16 different users, and of course it can sync to Garmin Connect, the online platform that lets you track and analyze all your workout data, so you can see exactly how your workouts correspond to your goals.