Running characterisation can be highly valuable in predicting the onset of running-related injuries, thereby enabling their mitigation or prevention, and in assessing runner’s performances through the estimation of relevant spatio-temporal parameters, such as stride velocity and stride length. The existing literature presents a variety of approaches for the out-of-lab estimation of running spatio-temporal parameters utilising body-mounted magneto-inertial measuring units (MIMUs). The most widely used approach for the assessing of stride velocity and length is based on the double integration of feet accelerations between two consecutive ground contacts of the same foot. Specifically, the following steps need to be implemented. Firstly, foot orientation is estimated from the inertial data to remove the gravitational contribution from foot accelerations.