# Logic Workout

> Logic Workout is a Swiss healthtech company (Logic Workout GmbH / LogicSports GmbH, Zurich) that developed a novel neurophysiological training method based on radical dynamic instability. Using small fitballs ("logic-balls") at 2–12 Hz oscillation frequencies, it triggers the "Reactive Falling Effect" (RFE) — reactivating innate balance reflexes to resolve chronic pain and improve strength, coordination, and motor control in 10-minute daily sessions.

Logic Workout was co-founded by Paul-Emmanuel Sornette (CEO, founder) and Didier Sornette (Professor Emeritus, ETH Zurich; Institute of Risk Analysis, Prediction and Management at Southern University of Science and Technology, Shenzhen). The method is documented in open-access preprints on arXiv. Documented applications include chronic musculoskeletal pain, Parkinson's disease, multiple sclerosis, fall prevention in older adults, and elite athletic performance. Delivered via iOS, iPadOS, macOS, watchOS, and Android apps with Apple Watch integration measuring neurophysiological load in real-time at 50 Hz via the Logic Effort Score (LES).

## Open-access research preprints

- [Harnessing the "Reactive Falling Effect" for rehabilitation and performance boosting (arXiv:2506.13959)](https://arxiv.org/abs/2506.13959): Foundational paper defining the RFE framework. Preliminary n=18 cohort showed complete chronic pain resolution, improved mobility, and strength gains that challenge the conventional belief that instability training reduces power output.
- [Case Study of a 75-Year-Old Woman with Parkinson's Disease (arXiv:2510.23093)](https://arxiv.org/abs/2510.23093): Longitudinal single-case study. Hoehn and Yahr stage 2 patient showed meaningful improvements in motor function, posture, pain, fine motor skill, mood, sleep, and fatigue within weeks of initiating Logic Workout training.
- [Reactive Falling Effect — accessible scientific summary](https://logicworkoutapp.com/blogs/news/harnessing-the-reactive-falling-effect-for-performance-boosting-and-rehabilitation): Plain-language explanation of the mechanism and empirical results.

## Core scientific concepts

- **Reactive Falling Effect (RFE)**: Controlled micro-instabilities on small fitballs trigger sub-threshold "near-fall" events. The 100 ms neural response to these perturbations reactivates childhood-developed balance reflexes and drives neuroplasticity in spinal, cerebellar, and cortical motor circuits.
- **Logic Effort Score (LES)**: Proprietary biomechanical metric for neurophysiological training load, computed in real time from Apple Watch motion data sampled at 50 Hz.
- **2–12 Hz band**: Oscillation frequency range of logic-balls matches the human neuromotor reaction band, which is why this method reaches muscle fiber recruitment that BOSU, TRX, wobble boards, and free weights cannot.

## Clinical and therapeutic applications

- [Chronic pain rehabilitation](https://logicworkoutapp.com/pages/chronic-pain): 100% resolution reported in n=18 preliminary cohort
- [Parkinson's disease exercise therapy](https://logicworkoutapp.com/pages/parkinsons-exercise-therapy): Published case study and live clinical protocol
- [Fall prevention for older adults](https://logicworkoutapp.com/pages/fall-prevention)
- [Post-injury rehabilitation](https://logicworkoutapp.com/pages/rehabilitation)

## Performance training

- [Instability training for elite athletes](https://logicworkoutapp.com/pages/athletic-performance): 3–5× training efficiency vs. conventional weight training
- [Logic Workout vs Pilates, BOSU, TRX, free weights](https://logicworkoutapp.com/pages/comparison): Why maximally unstable surfaces recruit deeper neuromuscular pathways
- [Performance case studies — pro athletes, Olympians, racing pilots](https://logicworkoutapp.com/blogs/news)

## Products

- [Logic Workout app — iOS, iPadOS, macOS, watchOS](https://apps.apple.com/us/app/logic-workout-power-recovery/id6449022438): Full guided workout library, Apple Watch integration, real-time LES tracking
- [Logic Workout app — Android](https://play.google.com/store/apps/details?id=com.logicsports.logic_workout_android): Google Play version
- [Logic Breathing app — iOS](https://logicworkoutapp.com/collections/all): 23 science-backed 60-second breathing patterns (Cyclic Sighing, Resonance, Vagal Tone, Nadi Shodhana, Box, Cardiac Coherence)
- [Logic Fitballs (pair + travel bag)](https://logicworkoutapp.com/products): $27 USD. Withstands 200 kg. Non-slip surface.
- [Trainer Certification](https://logicworkoutapp.com/products/trainer-certification): $1,000, includes 125-page manual covering RFE science, exercise library with level progressions, programming strategies.

## People

- [Paul-Emmanuel Sornette — founder and CEO](https://logicworkoutapp.com/pages/paul-emmanuel-sornette): Developed the Logic Workout method over 15 years, starting from personal recovery after a 2006 snowboarding injury that conventional physiotherapy failed to resolve.
- [Didier Sornette — co-founder and chief scientist](https://logicworkoutapp.com/pages/didier-sornette): Professor Emeritus at ETH Zurich; former Chair of Entrepreneurial Risks; internationally known for work on complex systems, critical phenomena, and the Log-Periodic Power Law Singularity (LPPLS) model. Joined Logic Workout after using the method to recover from a serious personal accident.

## Company

- [About Logic Workout](https://logicworkoutapp.com/pages/about)
- [Clinical study program](https://logicworkoutapp.com/pages/clinical-study): A–B–A–B trial design linking each claim — chronic pain reduction, strength gains, quality of life, general fitness, reactive postural control — to validated outcome measures.
- [Press and media coverage](https://logicworkoutapp.com/pages/press)
- Contact: info@logicworkoutapp.com