●  Intelligent strength training

Training that adapts to how you've recovered.

Strength IO reads your recovery — HRV, sleep, and every workout you log in any app — and builds each session to match. Heavier when you're fresh, lighter when you're not.

Coming soonSee how it works
No subscription to start · Reads from Apple Health
Strength IO — Home, readiness 95% Optimal

Even your runs and rides count.

01 — CROSS-APP AWARE
You did
12.4 mi run
Logged in Strava — never opened Strength IO.
StravaPelotonApple Fitness
→
Strength IO reads it
Recovery updated
Legs taxed from the distance. Readiness reflects the load.
→
Tomorrow's lifting
Volume trimmed ~15%
Lower body pulled back; upper body as prescribed. No logging required.

Read from seven signals, not one.

02 — RECOVERY
82/100
Daily readiness
Heart-rate variability+6% vs. baseline
Sleep7h 40m
Resting heart rate+3 bpm
Respiratory rateSteady
Blood oxygen98%
Wrist temperatureAt baseline
Heart-rate recoveryStrong

More than a workout log.

03 — WHAT IT DOES
Adaptive training

Weights anchored to your real effort and per-muscle recovery — set by set. Fresh muscles get pushed; taxed ones get volume pulled back, never forced.

Training load

Acute-to-chronic workload tracking flags when you're ramping too fast, so you build instead of break down.

Volume

Each muscle's weekly volume is kept inside its effective range — enough to grow, never junk sets.

Private by default

Coaching runs on your device. Your data stays yours.

●  Intelligent strength training

Train when you're recovered.

Coming soon
Free to start · iPhone & Apple Watch