THE RAYVIK BLOG

Notes from a runner.

Training days, races I dream of, and little wins along the way. Personal notes and product updates from Kai, the runner behind Rayvik.

Rayvik Plan syncing to Apple Calendar, with supported calendar providers alongside
PRODUCT UPDATE · 7 NOV 2026

Your training plan, now in your calendar

Connect your saved plan to your calendar. Move or cancel training with your coach, and your calendar follows as it refreshes.

Explore calendar sync →
A runner checking a Readiness score of 2 before a planned long run
APPLE WATCH · 25 OCT 2026

Low Apple Watch Readiness Score? Should You Still Run?

A low score, a run on the plan, and how I decide what to change.

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An imagined Berlin race with a runner in a blue Rayvik shirt among the crowd
RUNNING NOTES · 28 SEP 2026

One day, I want to run Berlin.

A world-record chase, a 50th finish, and my own 30K. What Berlin made me think about this week.

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