What data does a plantar pressure distribution system mainly measure, and what is it used for?

The plantar pressure distribution system uses sensors to detect data such as the pressure distribution of a person in a static or walking state.

The main measurement data are as follows:

1. Pressure value.
   This measures the pressure magnitude of each region of the sole of the foot, usually in kilopascals (KPa) or newtons per square centimeter (N/cm²).
   By measuring this pressure value, one can identify high-pressure and low-pressure areas such as the heel and forefoot.
2. Pressure distribution map, i.e., heat map.
   The so-called pressure distribution map visualizes the pressure data in the form of a color heat map. It can more intuitively display which areas are more concentrated in force and which areas bear less force. Areas with concentrated force are shown in red or yellow, while areas with less force are usually shown in blue or green.
   Whether for a rehabilitation therapist, doctor, or user, it allows for a clear understanding of one’s plantar force distribution.
3. Contact area.
   This value mainly calculates the total contact area between the sole and the supporting surface, as well as the contact areas of different regions (such as the heel, midfoot, and forefoot), in either a static or walking state.
4. Center of pressure (COP) trajectory.
   This value represents the trajectory of the body’s center of gravity movement when a person is standing still or walking.
   Under normal conditions, the center of gravity trajectory is smooth and symmetrical.
   Conversely, if the trajectory is abnormal, it may indicate problems in gait or balance.
5. Gait parameters.
   This data shows stride length, step width, gait cycle, etc., mainly used to analyze the rhythm and symmetry of walking.
6. Symmetry analysis of the left and right feet.
   For example, comparative analysis of left and right foot pressure, differences in contact time, COP differences, etc. Such data can also be used to determine whether there are problems with gait balance.

These data are usually applied in the fields of medical rehabilitation and foot health, as well as footwear and insole research, development, and personalized design.