A: There are so many ways to measure your rides and workouts. Miles, time, elevation, etc. The truest sense of your effort is how much ‘work’ did you do, and for endurance sports, Kilojoules is the metric for work. Kilojoules can be directly measured by your power meter, or calculated via your heart rate data (as long as we know your weight, which we do). We do both at The Breakaway. Why? Because there’s a big difference in the work it takes to do 100 miles in 4 hours vs 7. And there’s a big difference in doing 100 miles in 5 hours with 2,000 feet of elevation, vs the same ride with 11,000 feet of elevation. But a ride that was 2,000 kilojoules for you is normalized – it’s the same work regardless of distance or elevation.