RPE: An alternative to heart rate.
We use distance to determine how much you should run, and days per week to tell us how frequent we should run. But what do you use to determine at what intensity your runs should be? How do you rate how hard a training run was?
The secret to becoming a runner (from scratch).
Think about this: You join the gym for the first time to get better at lifting heavy things. What would happen if you start day one off with the heaviest weights?