Precision Clinical Biomechanics: Objective Gait & Movement Analysis in Neurological and Orthopedic Care with BTS G-WALK

BTS BIOENGINEERING · ITALY
INERTIAL MOTION BIOMECHANICS · CLINICAL GAIT

By Beamed Clinical Application Team
•
September 22, 2026
•
5 Min Read
•
Diagnostic Biomechanics

Subjective visual observation of human walking patterns lacks the sensitivity to detect subtle kinematic asymmetries or evaluate rehabilitation progress accurately. BTS Bioengineering (Milan, Italy) engineered the BTS G-WALK — a pocket-sized, wireless inertial sensor that attaches to the patient’s sacrum to provide objective, laboratory-grade spatial-temporal gait parameters and pelvic kinematics within two minutes.

BTS G-WALK Wireless Inertial Sensor for Gait Analysis

9-Axis Inertial Fusion
Triaxial accelerometer, gyroscope, and magnetometer with micro-drift filtering

Instant Objective Reports
Automatic comparison with thousands of age- and gender-stratified normative datasets

Comprehensive Test Battery
Walk+, Timed Up and Go (TUG), 6-Minute Walk (6MWT), and Jump Screening

Ultra-Portable & Fast Setup
Weighs just 37 grams; attaches with an ergonomic waistband in under 30 seconds

1. The Technological Core: Wireless Inertial Sensing

Positioned over the fifth lumbar and first sacral vertebra (L5-S1), the center of gravity of the human pelvis, the BTS G-WALK records spatial linear accelerations and angular velocities during locomotion. Using advanced sensor fusion and proprietary biomechanical algorithms developed over 30 years by BTS Bioengineering, the sensor reconstructs the complete three-dimensional kinematics of pelvic motion:

Pelvic Tilt (Sagittal Plane): Forward and backward rotational displacement throughout the gait cycle.
Pelvic Obliquity (Coronal Plane): Upward and downward pelvic drop, detecting Trendelenburg signs and abductor weakness.
Pelvic Rotation (Transverse Plane): Internal and external axial rotation coordinating step length and trunk movement.

2. Standardized Clinical Protocols Available on BTS G-WALK

The software provides dedicated clinical workflows tailored for rehabilitation hospitals, neurological institutes, and sports performance clinics:

Walk+ Protocol

Quantifies cadence, speed, stride length, stance phase percentage, swing phase, double support duration, and the Gait Symmetry Index (GSI) with normative overlay.

Timed Up and Go (TUG)

Breaks the TUG test into micro-phases: sit-to-stand transition, outbound walking, turning velocity, return walking, and stand-to-sit descent, pinpointing fall risks in Parkinson’s and geriatric care.

Jump & Return-to-Play

Countermovement Jump (CMJ) and Drop Jump analysis assessing flight time, jump height, take-off velocity, and bilateral force asymmetry during ACL rehabilitation.

BTS G-WALK — SENSOR SPECIFICATIONS
Sensor Type	9-Axis Wireless Inertial Measurement Unit (IMU)
Sensory Components	3-Axis Accelerometer (±16g), 3-Axis Gyroscope (±2000°/s), 3-Axis Magnetometer (±1.3 Gauss)
Sampling Rate	High-frequency acquisition up to 200 Hz for high dynamic fidelity
Wireless Transmission	Bluetooth 4.2 Low Energy (range up to 30 meters real-time transmission)
Weight & Dimensions	Ultra-lightweight 37 grams; 70 x 40 x 18 mm
Battery Autonomy	Integrated rechargeable lithium-ion battery with > 8 hours continuous recording
Software & Reporting	G-Studio multi-protocol biomechanics suite with automated PDF clinical reporting
Certifications	Medical Device CE Class I; FDA Registered

“BTS G-WALK has transformed our gait clinic. We can test twenty neurological and post-stroke patients in a single morning. The instant symmetry indices give our physical therapists clear numerical targets to guide robotic treadmill training.”

— Head of Neurological Rehabilitation, Regional Tertiary Hospital