Until a better solution is found with: a treadmill like this: updated with a treadmill motor like this: and a treadmill controller like this: and a open source Raspberry Pi treadmill speed sensor like this: https://forums.raspberrypi.com/viewtopic.php?p=2183857#p2183857 attached to a software like this: https://github.com/neuropsychology/NeuroKit Treadmills are not interesting at all for Peter Gamma from www.petergamma.org.