*4.1. Strengths of the Study*

This study brings light on the precision of several types of sensors and the impact of their position on the estimation of the distance walked by individuals with stroke sequelae. Overall, the devices had an estimation error of about 100 m after walking for 6 min, with the exception of the pedometer and the Actigraphs worn on the ankles, which provided better results. Knowing that stroke survivors walk at an average speed of 0.5 ms−<sup>1</sup> (1.8 kmh<sup>−</sup>1), this estimation error would cause an underestimation of about 1 km per hour of walking, which would amount to more than 50% of the measured distance. The most accurate estimation was obtained using the Actigraph on the ankle on the unaffected side and the pedometer on the hip on the unaffected side with a mean standard error of about 20 m after a 6-min walk, which corresponds to 200 m per hour of walking. Therefore, according to these results, medical practitioners should use either the Actigraph placed on the unaffected ankle or the pedometer placed at the hip. Between these two choices, the pedometer appears to be an attractive solution due to its low price. Additionally, our results bring to both the practitioner's and the end-user's attention the accuracy issues of these devices and the necessity to wisely choose the position and type of the sensor to avoid unreliable estimations.
