Ideal for professional athletes and competitive amateurs, Suunto T6C ($366) offers analysis on workouts to provide key details for training at the right level. No more over-training or under-training. The T6C's allows users to monitor their endurance by tracking energy and oxygen consumption, as well respiratory rate and training effect. In addition, the water resistant T6C also features real-time heart rate and calorie monitor, interval and countdown, dual time, date, alarm, stopwatch with lap times and altimeter.