Table 2.

Advantages and disadvantages of some commonly used sensors for HAR.

Sensor	Advantages	Disadvantages
vision sensors	intuitive	high cost, complex setup and susceptibility to lighting condition and occlusion
wireless devices	device-free and larger coverage	vulnerable to interference from other electromagnetic devices
inertial measurement unit	wearable and motion-related	drift and instability
textile pressure sensors	wearable, contact-related, deformable and stretchable	non-waterproof and instability