1
Bring your history
Current sources include local FIT file upload and athlete-authorized Strava connection. Imported history enters one shared ingestion pipeline.
How it works
A disciplined path from history to guidance.
Tyzle separates raw facts, deterministic measurements, revisable beliefs, and future recommendations so athlete understanding can improve without pretending certainty.
2
Preserve evidence
Accepted activity observations are preserved with source provenance. Corrections add evidence; they do not rewrite history.
3
Calculate measurements
Tyzle calculates reproducible measurements with explicit algorithms, method versions, evidence counts, date ranges, and units.
4
Learn patterns
Observers convert measurements into bounded beliefs only when evidence supports them. Confidence and limiting factors remain visible.
5
Recognize change
Tyzle detects athlete eras so current understanding is not flattened into a lifetime average when a sustained training pattern has changed.
6
Produce explainable guidance
Coaching guidance is a later consequence of understanding. Important recommendations must trace back through beliefs, measurements, and evidence.
AIM distinctions
Tyzle does not treat conclusions as raw facts.
Facts
Validated observations, such as an accepted ride artifact or activity timestamp. Facts are preserved as evidence.
Measurements
Deterministic calculations from evidence, such as weekly duration or data coverage. Measurements compute; they do not interpret.
Beliefs
Evidence-backed explanations of the athlete, with confidence, scope, provenance, and versioning.
Recommendations
Coaching-support outputs that must be justified by reasoning grounded in evidence. They are not current private-beta claims.
Current versus historical
A current state is not a lifetime average.
Historical understanding
Historical evidence keeps its value. It can show prior capability, long-term patterns, source coverage, and transitions across different athlete eras.
Current understanding
Present-tense conclusions require temporal scope. Recent and current-era evidence should dominate when describing the athlete today, especially after a sustained change.
Data sources
Provider status is explicit.
Tyzle names current sources separately from planned or pending-provider-access sources.
Currently supported
- Current FIT file upload
- Current Strava connection
Strava access is athlete-authorized. Tyzle currently requests read and activity-read permissions and does not request permission to post activities.
Planned or pending approval
- Pending Garmin
- Pending TrainingPeaks
These integrations should not be read as live availability or provider endorsement. They depend on provider access and approval.