Run the effort. Do not chase the pace. Finish neutral. Leave 15% of effort unused. Speed emerges from organization. Correct the position. The effort follows. Stay low. Travel forward. Relax the shoulders. Wrist to hips. Cadence organizes the stride. Tap the ground. Do not push it. When unsure: slow slightly. Lengthen the horizon. Choose durability over intensity. Metrics confirm rhythm. They do not create it. The body is the reference. The watch is feedback.