Protern
Henrik Kristoffersen already knows when a run feels fast. Protern helps show why. He and Stratton Mountain School coaches explain how video, GPS and analytics reveal where speed is gained, lost and recovered.
Peter LangeOct 08, 2026Protern brings GPS timing, speed analysis and video together to help ski coaches spend less time managing equipment and more time working with athletes.
Katie TwibleSep 29, 2026



