A fresh install may have only a few days of sleep and workout data in Apple Health. You can still begin a first plan.
Thin data calls for low confidence. A questionnaire and partial signals do not carry the same weight as weeks of training history.
The first plan should stay cautious
Without history, the first plan can use your goal, ski date, available days, basic profile, reported limitations, and preferred starting point. That is enough to choose a sensible direction.
The app should wait for more evidence before fine-tuning the load or making strong claims.
Each week of data sharpens the next plan
Workouts, sleep, and recovery signals make the next plan more specific. The history can show steady training, poor recovery, missed sessions, or a change in schedule.
SlopeReady improves the plan as the feedback loop gains evidence. Day one begins the process.
Uncertainty should be visible
Missing, sparse, or conflicting signals should produce a clear message. “Not enough data yet” gives you more useful information than a score with unsupported confidence.