Changes

There's an old saying that "[[All models are wrong]]| all models are wrong, but some models are useful]]." So, while running power meters can't measure your power output, they can still be useful. It's possible for a running power meter to estimate how an incline or decline changes exercise intensity for a given pace. This can allow for more even pacing on hilly courses, which gives a more even effort when training. More importantly, it can allow for more even pacing on a hilly race, which would be great for things like the Boston Marathon. This could be more effective than [[Heart Rate]], which suffers from a significant lag between changes in intensity and a change in Heart Rate, as well as [[Heart Rate Drift]]. A running power meter can also be useful when doing uphill interval training, where they can provide some insight into the effort required compared with level ground.