Each sensor has 62mm × 36mm x 16mm dimensions, weighing 60g, and consists of a three-axis accelerometer (maximum scale ± 6g), a 3-axis gyroscope (full scale ± 300°/s) and a magnetometer of 3 axes (full scale ± 6 Gauss). Data will be collected at a sampling frequency of 50Hz, and will be transmitted via Bluetooth to a computer and processed using proper software of the device (BTS G-STUDIO, version: 2.6.12.0), which automatically provides the parameters (Galli et al 2015).