2.3.3. Pedometer (ONStep 400, Geonaute)

The ONStep 400 (Decathlon France S.A.S, Villeneuve d'Ascq, France) is an inexpensive pedometer available to the general public. Its size is 6.5 cm × 4.1 cm × 1.5 cm, and its weight is 40 g. It can be worn on the hip, in the pockets of trousers, or around the neck using a strap [36]. The data recorded by the pedometer can be observed directly on the device, which does not require specific software. The recording is triggered when the subject initiates the first step and ends when the subject is no longer

in motion. This device uses a piezoelectric mechanism to count the number of steps. We used the step count estimate provided by the pedometer for our work. We chose to place the devices on the unaffected hip and around the neck to judge the impact of the placement on the estimations of the sensor. The sensor was attached to the limb by an elastic band for hip placement and a fabric strap provided by the manufacturer for placement around the neck.
