Observed arrival · 2026-10-15
Achilles: training that reads the body before the calendar
Achilles presents an iPhone training app for multisport athletes, combining readiness estimates, progressing workout plans, and tools for fuel and mental training.
- For
- Multisport athletes balancing lifting and endurance
- Worth noticing
- Readiness compares five sleep and heart metrics with a rolling 30-day personal baseline; missing inputs are reweighted rather than imputed.
Field notes
The page describes a morning readiness score built from heart-rate variability, resting heart rate, sleep duration, sleep quality, and sleep efficiency, each compared with a rolling 30-day personal baseline. Missing measurements are reweighted rather than filled in, and the page says the score is deterministic while AI only reads it. Its strength progression adds reps before weight, then resets after three stalls with a 10% reduction.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
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