Effort Pace measures your swimming pace based on your exertion level, differing from GPS pace which is influenced by environmental factors like currents, tides, wind, and underwater connectivity. It's comparable to Grade Adjusted Pace (GAP) in running, which accounts for elevation changes.

This metric is available for freestyle swimming in open water mode, both with and without a compatible watch. Effort Pace is a personalized metric, developed from your pool swimming data and adapted for open water use. To activate Effort Pace, you must complete at least 2500m of freestyle swimming in a pool. After meeting this minimum, your pace will continue to update with subsequent swims for improved accuracy.

Effort Distance is calculated in real-time, based on the swim's elapsed time and your Effort Pace. These metrics are exclusively visible in the goggles and are not displayed in the app after syncing your swim.