Bi-Stretch™ Technology

Bi-Stretch™ enables independent control for each leg, delivering precise, balanced stretching with the flexibility to tailor recovery to each side.

  • Dual-Core Motion Control

    Powerful processing enables ultra-fast response times of up to ±50 ms, keeping every stretch smooth, precise, and consistent.

  • Dual Signal Adaptive Sensing

    Continuously monitors position and tension, adjusting force and angle in real time to deliver a more personalized recovery experience.

  • Split-Calf Independent Control

    Independent leg guidance supports precise, side-specific stretching to help address imbalances over time.

  • 8 Professional Programs

    Thoughtfully Designed for different recovery needs, these guided routines help legs and feet feel refreshed and ready to move.

At the core of Bi-Stretch™ is the industry-first split calf intelligent control system. Like giving each leg its own “control center,” it analyzes differences with precision and delivers truly asymmetrical stretching. Powered by dual-core processors and ultra-fast algorithms, this intelligent network achieves a ±50 ms response time with trajectory-level accuracy of ±0.1° and ±1 mm—ensuring every stretch is precise, smooth, and efficient.

Sentio

Powered by Bi-Stretch™ Technology

Three professional stretching massage chairs with different positioning to meet the needs of various fitness enthusiasts

Aront

Sentio

1. Core Configuration
3D massage mechanism + extended SL-track for precise spinal contouring

2. Control Experience
Integrated armrest controls — no remote needed, one-touch start

3. Massage Performance
Leg & foot airbags with reflexology rollers for everyday relaxation

4. Ideal For
Daily living room use, perfect for whole-family relaxation

Aront

Sentio PRO

1. Core Configuration
4D deep-tissue massage mechanism targeting fascia and deep muscle layers to relieve persistent soreness

2. Control Experience
Offline voice control for true hands-free operation—just speak to start

3. Massage Experience
Full-body enveloping airbag system to release physical and mental tension

4. Ideal For
Tech enthusiasts, busy professionals, and users seeking a top-tier massage experience

Aront

Sentio MAX

1. Core Configuration
Flexible dual-mechanism track for full-body contouring and adaptive support

2. Control Experience
8-inch HD touchscreen with intuitive visual controls, easy for seniors to use

3. Enhanced Massage Experience
Full-body airbag system + acupressure foot rollers for a spa-level experience

4. Ideal For
A premium home relaxation space, designed for deep, whole-family recovery

Muscle Relaxation Performance Comparison

Based on electromyography (EMG) analysis, Bi-Stretch™ technology demonstrated significantly superior relaxation effects across five key muscle groups compared to traditional massage chairs.

  • Overall Muscle Relaxation

  • Rectus Femoris Relaxation

  • Tensor Fasciae Latae Relaxation

Professional Stretching Programs

Eight scientifically designed stretching programs tailored to different muscle groups and activity scenarios, delivering a comprehensive and effective recovery solution.

1. Iliopsoas Stretch (Core Recovery)
Targets hip tightness caused by prolonged sitting or core training, relieving lower-back pressure while improving posture and core stability.

2. Cycling Stretch (Dynamic Stretching)
Simulates cycling motions to dynamically extend the lower-body muscle chain, boosting leg circulation, reducing stiffness, and enhancing endurance.

3. PNF Stretch (Advanced Technique)
Uses professional “contract–relax” methods to improve muscle elasticity and flexibility by over 30%, while enhancing muscle control.

4. Recovery Stretch (Relaxation & Reset)
Gentle static stretching that helps the body shift into recovery mode, deeply relaxing muscles and easing post-workout soreness.

5. Full-Body Stretch (Total Relaxation)
Gently and smoothly stretches major muscle groups throughout the body, relieving tension in the shoulders, back, and legs while promoting deep relaxation.

6. Lower-Body Stretch (Leg Recovery)
Systematically targets muscles such as the quadriceps after high-intensity training to improve flexibility, accelerate recovery, and help prevent injury.

7. Piriformis Stretch (Targeted Relief)
Precisely releases the deep piriformis muscle to ease glute soreness and sciatic discomfort, increasing hip mobility.

8. Vitality Stretch (Active Warm-Up)
Light, dynamic stretching to quickly activate the body, awaken muscles, boost blood flow, and increase neural readiness for exercise warm-up.

User Scenarios & Smart Solutions

Personalized, intelligent recovery programs designed for different user groups and everyday use scenarios.

  • Professional Athletes

  • Fitness Enthusiasts

  • Sedentary Office Workers

  • Middle-Aged & Older Adults

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Designed to address muscle fatigue, soreness, and micro-damage after high-intensity training, delivering a scientific and highly efficient recovery approach.

Professional Athlete Recovery Solution

Recommended Stretching Programs

Choose targeted recovery programs based on your sport and training demands:Lower-Body Stretch · PNF Stretch · Piriformis Stretch · Recovery Stretch

Core Needs

Rapid relief of delayed onset muscle soreness (DOMS), reduced risk of sports injuries, and accelerated muscle repair and supercompensation.

Solution

Supported by experimental data, Bi-Stretch™ technology improves overall muscle relaxation by 138.5%, with targeted benefits for key athletic muscle groups such as the rectus femoris and tensor fasciae latae.

When to Use

The optimal 30–90 minute post-training recovery window, pre-competition relaxation and activation, and active recovery on rest days.

Designed to address muscle tightness and joint stiffness after strength training, HIIT, CrossFit, and other gym-based workouts.

Fitness Enthusiast Recovery Solution

Recommended Stretching Programs

Select recovery programs based on your training focus:
Iliopsoas Stretch · Lower-Body Stretch · Full-Body Stretch · Vitality Stretch

Core Needs

Relieves tightness in the quadriceps and hamstrings after squats and deadlifts, improves joint range of motion, and helps prevent training-related injuries.

Scientific Evidence

Studies show that Bi-Stretch™ improves rectus femoris relaxation by 50.0% (vs. 8.4% with traditional massage chairs) and increases hip extension by 13.1%.

Training Integration

Integrates intelligent stretching into your training routine to enhance workout quality, recovery efficiency, and overall safety.

Designed to address common modern office-related issues caused by prolonged sitting, including lower back pain, hip tightness, and neck strain.

Office & Sedentary Lifestyle Recovery Solution

Recommended Stretching Programs

Specifically selected for sedentary-related concerns:Iliopsoas Stretch · Piriformis Stretch · Full-Body Stretch · Recovery Stretch

Core Issues

Shortened iliopsoas, inhibited gluteal muscles, increased lower back pressure, rounded shoulders, and poor posture.

Targeted Solution

Bi-Stretch™ delivers 18.0% relaxation of the external oblique muscles (vs. 4.4% with traditional massage chairs), effectively relieving deep core muscle tension caused by prolonged sitting.

Use Scenarios

Office lunch breaks, post-work relaxation at home, and deep recovery sessions on weekends.

Active Aging & Senior Wellness Solution

Recommended Stretching Programs

Tailored to the specific needs of older adults:Full-Body Stretch · Lower Body Stretch · Piriformis Stretch · Vitality Stretch

Core Challenges

Joint degeneration and stiffness, chronic muscle soreness, reduced blood circulation, weakened core strength, and declining sleep quality.

Targeted Solution

Bi-Stretch™ improves joint mobility by up to 528.6% (vs. 1.4% with traditional massage chairs) and enhances muscle relaxation by 138.5%. Gentle, passive stretching minimizes injury risk, with a +13.1% improvement in hip extension, making it ideal for aging bodies.

Ideal Use Scenarios

Morning body activation, afternoon relaxation and recovery, pre-bedtime stretching to support better sleep, and daily joint maintenance.