Table 3.

Type of sensor used within reviewed studies

Type of wearable technology used	n	References
IMU (a combination of sensors in one unit; accelerometer, gyroscope, magnetometer)	61	[19–21, 23, 24, 26–29, 33, 36, 38, 42, 43, 49, 50, 52, 54, 56, 57, 59, 62, 70, 72–97, 99–109, 128]
Accelerometer only	37	[30–32, 34, 35, 41, 44, 46, 48, 51, 58, 60, 63, 64, 110–121, 129–139]
Pressure sensor/insole	27	[25, 37, 39, 40, 45, 47, 55, 65–69, 71, 124, 125, 140–151]
Pressure sensor and accelerometer	2	[53, 123]
Pressure sensor and IMU	2	[98, 122]
IMU and separate accelerometer	1	[61]
Gyroscope	1	[127]

Note: Table refers to how each study classified the technology used, rather than the components used for analysis (i.e. some studies used an IMU, but only analysed data from one element of the unit)

IMU inertial measurement unit