Treadmill gait speeds correlate with physical activity counts measured by cell phone accelerometers.
Carlson RH, Huebner DR, Hoarty CA, Whittington J, Haynatzki G, Balas MC, Schenk AK, Goulding EH, Potter JF, Bonasera SJ. Treadmill gait speeds correlate with physical activity counts measured by cell phone accelerometers. Gait Posture. 2012 Jun; 36(2):241-8.