Plantar pressure and gait measurement is a precise detection method that integrates biomechanics and sensor technology. It aims to provide scientific support for fields such as medicine, sports science, rehabilitation engineering, and health management by quantifying and analyzing the pressure distribution between the foot and the ground as well as gait characteristics. The significance of this technology lies not only in the early detection and intervention of abnormal gait and foot pathologies but also in its role in optimizing athletic performance and providing scientific guidance for rehabilitation processes.

Principles

1. Principles of Plantar Pressure Measurement

Plantar pressure measurement primarily relies on sensor technology, utilizing highly sensitive pressure sensor arrays to capture the pressure distribution information between the foot and the ground. These sensors are commonly integrated into pressure plates, insoles, or dynamic testing treadmills. During measurement, the system collects the following key data:

• Pressure Magnitude: The force exerted per unit area, used to evaluate the load distribution in different areas of the foot.
• Pressure Distribution: The distribution of pressure across various regions of the foot, helping to determine whether foot function is normal.
• Pressure-Time Integral: The variation of pressure over time, used to analyze dynamic gait characteristics.

This data is recorded using high-precision data acquisition and signal processing systems, then visualized and analyzed through specialized software.

2. Principles of Gait Measurement

Gait measurement captures the kinematic and kinetic characteristics of a person’s walking or running dynamically. The equipment used includes:

• 3D Motion Capture Systems: These systems use high-precision cameras or sensors to track the movement trajectories of markers, recording kinematic parameters such as stride length, cadence, and joint angles.
• Force Plates: These measure the ground reaction force during the gait cycle, providing insights into gait dynamics.
• Inertial Sensors: Using accelerometers and gyroscopes, these sensors monitor lower limb movement patterns.

Gait measurement emphasizes segmental analysis of the complete gait cycle (including the stance and swing phases), offering detailed data for clinical diagnosis, rehabilitation, and performance optimization.

Significance

1. Applications in Medical Diagnosis and Treatment

Plantar pressure and gait measurement are critical for the early detection of foot pathologies. For instance, diabetic foot patients with abnormal pressure distribution are at risk of ulcer formation. Regular monitoring can identify high-risk areas and enable protective measures. Additionally, this technology provides precise diagnostic support for conditions such as flat feet, high arches, and foot pronation or supination, aiding in the design of corrective devices.

Postoperative rehabilitation evaluation is another significant application. By monitoring changes in gait and plantar pressure in postoperative patients, physicians can dynamically adjust rehabilitation plans to ensure desired treatment outcomes.

2. Sports Science and Performance Optimization

In sports, plantar pressure and gait measurement offer personalized evaluation services for athletes. By analyzing gait cycles, pressure distribution, and center of gravity shifts, it is possible to optimize running techniques, reduce energy expenditure, and minimize the risk of injuries. Moreover, this data provides a scientific basis for the design of athletic footwear, promoting the development of personalized and functional products.

3. Health Management and Preventive Care

As health awareness grows, plantar pressure and gait measurement are increasingly incorporated into general health management. Older adults can monitor gait changes regularly to prevent falls or degenerative bone diseases, while children can detect developmental abnormalities early to enable timely interventions and ensure normal growth.

4. Advancing Scientific Research

The development of plantar pressure and gait measurement technology has propelled research in biomechanics, rehabilitation engineering, and sports science. These technologies not only provide high-precision data for theoretical studies but also serve as experimental foundations for developing new devices and methodologies.

Plantar pressure and gait measurement, as a multidisciplinary technology, combines sensor technology with biomechanical analysis. Its significance spans medicine, sports, and health management. In the future, with further advancements and widespread adoption of the technology, its potential in personalized diagnosis, precise treatment, and intelligent health management will be fully realized, contributing more to improving human health and quality of life.