[IEEE 2020 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) in conjunction with the 43rd Annual Conference of the Canadian Medical and Biological Engineering Society - Montreal, QC, Canada (2020.7.20-2020.7.24)] 2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC) - Real-world speed estimation using single trunk IMU: methodological challenges for impaired gait patterns *