HealthStars: Train Your Heart

Most training apps tell you how the workout went. HealthStars tells you what today's workout should be — and whether your body can actually take it. Set one goal, log one session, and the plan builds itself out of your own numbers: your VO₂ category, body composition, current training level and history. A conditioned runner skips the base weeks. A sedentary one doesn't get handed sprints in week one. READINESS — A SCORE BEFORE THE SESSION, NOT A VERDICT AFTER IT Every planned workout is scored from 0 to 100 against what your body actually brought to it: last night's sleep, stress, nutrition, hydration, medication adherence, the session's own intensity, and the temperature, humidity and altitude you'll be training in. You get one number — plus the exact factors holding it down, ranked by how much drag each one is adding. Sleep the biggest problem today? Move the sprint block, or run it…