ANT+ Stride Based Speed and Distance Monitor
A stride based speed and distance monitor (SDM) is a personal body-worn device that allows the wearer to measure the number of strides taken, the speed at which he or she is traveling and/or the distance he or she has covered based on stride measurements and calculations. Some examples of SDMs include the foot-worn pods that go on or in a shoe and reconstruct strides to compute speed and distance while walking or running. Similarly pedometers that may be worn on the waist or elsewhere are also considered SDMs.
SDMs are worn on or close to the body and transmit stride, speed and/or distance information to a watch or other display device. Some SDMs can compute additional information such as cadence. The display device can be a watch, cell phone, piece of fitness equipment, or other personal display device.