Rudder — A coach for athletes who train with intent

What goes wrong

Your Garmin watch says “Unproductive” after yesterday’s easy run because your pace was slow. Your HRV is fine. You have tempo work today. Do you trust the watch or your body? Runners face impact fatigue that doesn’t show in HRV — your cardiovascular system recovers faster than your muscles and connective tissue.

What current tools miss

Garmin can’t feel your achilles. Oura doesn’t know you ran hills yesterday. No device measures the cumulative impact loading that causes running injuries. Devices track cardiac recovery; runners need musculoskeletal readiness too.

What signals matter

For runners: soreness location and severity (the check-in captures this), consecutive running days, recent hard session count, HRV trend (illness detection), sleep debt accumulation, and running-specific injury history.

How Rudder resolves it

Feel-first: soreness and energy captured before any data. Injury guard: if you reported returning from injury, hard sessions trigger automatic modification. Consecutive day tracking: runners who chain 5+ days without rest get flagged. Impact awareness through feel capture fills the gap devices miss.

Example decisions

Tempo run planned. Legs sore from yesterday's hills. HRV normal.

MODIFY

MODIFY to easy run. Muscles need 48h, not 24h. HRV doesn’t measure connective tissue.

Long run day. You feel flat. Oura readiness 58.

GO WITH LIMITS

Try the WARMUP GATE. “Flat” for you resolves after 15 minutes 3 out of 4 times. Start easy, reassess at 2 miles.

5 consecutive running days. Everything feels fine.

MODIFY

MODIFY — take a rest or cross-train. Cumulative impact loading doesn’t show in daily metrics until it’s too late.

Works with your running stack

Strava, Oura, WHOOP, Garmin (coming soon), TrainingPeaks.

See all integrations

Save the long run Sore legs: normal or warning?Protect key workouts Strava integration Rudder vs Oura

Frequently asked

Does Rudder understand running-specific fatigue?: Yes. Running creates cumulative impact loading that cycling doesn't. Rudder factors in consecutive running days, weekly mileage trends, and the difference between muscular fatigue and cardiovascular recovery.
Can I use Rudder for marathon training?: Yes. Marathon training is where the feel-vs-data conflict hits hardest. Long blocks of high mileage create deep fatigue that doesn't always show in HRV. Rudder catches what the watch misses.
Do I need a running watch?: No. Rudder works on feel alone. A GPS watch (Garmin, Polar, COROS via Strava) adds training load context that makes the decision richer.

Devices track cardiac recovery.

You need musculoskeletal readiness.

Start your free check-in