# Logic Workout

> Logic Workout is a brain-driven strength training method and app (iOS, Apple Watch, Android) built around the Logic ball. Its exercises use the ball's rolling, chaotic deformation and spring rebound so the nervous system cannot pre-load a movement pattern, which drives many muscles near failure at once at low load. The method's creator advocates two hours a week. Tagline: Outsmart your muscles.

Made by Logic Sports GmbH (Zurich, Switzerland), founded by Paul-Emmanuel Sornette and Prof. Dr. Didier Sornette (ETH Zurich).

## Key facts

- Category: brain-driven training. Not instability training, not Pilates: the goal is whole-body muscle recruitment near failure, not balance.
- Mechanism: the Reactive Falling Effect. Three forces from the ball at once — rolling, chaotic deformation and a spring rebound — put the corrections in a 2–12 Hz band.
- Measurement: about 10 times the reactive demand of a stable push-up (jerk and spectral power), measured with an Apple Watch wrist accelerometer in the 2–12 Hz band, against a stable push-up matched for voluntary tension. This measures the demand of the movement, not muscle recruitment. An EMG study with a university lab is underway to measure recruitment directly.
- Research: two open-access preprints on arXiv, peer review pending — arXiv 2506.13959 (a performance and recovery cohort) and arXiv 2510.23093 (a single case study of a 75-year-old woman with Parkinson's disease).
- App: guided sessions with levels L1 to L5 and a video for every level, a real-time Logic Effort Score on Apple Watch, recovery programs, English and French. Strength tests are part of Logic Workout Premium, free for 14 days.
- Equipment: the Logic ball, two 20–22 cm balls (8–8.7 in), rated to 200 kg (440 lb).

## Strength tests

Every movement is scored on one ladder — Injury Risk, Healthy, Strong, Athlete, Legend — against standards set separately for men and women. Results colour a body map muscle by muscle, chart progress on an Evolution chart, and point to focused workouts that close the gap. Targeted tests mark each target Failed, Pass or Aced. Scores depend on gender, not age.

- [Strength tests](https://logicworkoutapp.com/pages/strength-tests): the ladder, the body map, and the Logic Carryover — Logic Workout's own goals after 12 months at two hours a week, on gym and track movements the app never trains (pull-ups, push-ups, deadlift, single-leg squats, 100 m sprint). Each target is that movement's Athlete band.
- [NFL Combine test](https://logicworkoutapp.com/pages/nfl-combine-test): the six NFL Scouting Combine events in the official order, with targets for a solid Combine performance — 40-yard dash 4.50 s, bench press 225 lb (102 kg) 23 reps (15 to pass), vertical jump 89 cm (35 in), broad jump 305 cm (10 ft), 20-yard shuttle 4.20 s, 3-cone drill 7.00 s. Men only. Not affiliated with or endorsed by the NFL.
- [Army Fitness Test](https://logicworkoutapp.com/pages/army-fitness-test): four of the five U.S. Army Fitness Test events on the Army's scales approved 15 May 2025, ages 37–41. Men: 3-rep max deadlift 350 lb (159 kg); hand-release push-ups 40 to pass, 59 max; plank 1:10 to pass, 3:20 max; 2-mile run 20:44 to pass, 13:42 max. Women: deadlift 220 lb (100 kg); hand-release push-ups 15 to pass, 43 max; plank 1:10 to pass, 3:20 max; 2-mile run 22:59 to pass, 15:51 max. The push-up pass marks are Logic Workout's own. Sprint-Drag-Carry is not included. Not affiliated with or endorsed by the U.S. Army.
- [The Logic Standard and The Logic Athlete](https://logicworkoutapp.com/pages/the-logic-standard): two tests on Logic Workout's own exercises. The Logic Standard asks every movement for its Strong level; the Logic Athlete for its Athlete level. On a Logic ball, the level is the load.

## The method and the product

- [Home](https://logicworkoutapp.com/): the method, the mechanism, the preprints, the app and the ball.
- [The Logic ball](https://logicworkoutapp.com/products/logic-workout-fitball-duo-22cm-pack-of-2): the equipment, two balls with a carrying bag.
- [Parkinson's protocol](https://logicworkoutapp.com/pages/parkinson): the dedicated protocol in the app and the case study behind it (a single case, not a controlled trial).
- [Blog](https://logicworkoutapp.com/blogs/news): articles on the method.

## Optional

- [Agent instructions for shopping](https://logicworkoutapp.com/agents.md): how agents can browse the store and check out, maintained by Shopify.
- [Sitemap](https://logicworkoutapp.com/sitemap.xml)
- App Store: https://apps.apple.com/us/app/logic-workout-power-recovery/id6449022438
- Google Play: https://play.google.com/store/apps/details?id=com.logicsports.logic_workout_android&hl=en-US