Figure 2.
Number of studies validating single-point IMU gait metrics analysis by sensor location. Smart devices have been attached on various locations, some separate to where they were designed to be worn – the iPod touch G4 (iOS 6, Apple Inc.) over L3 (108), the Apple Watch (Apple, San Francisco, CA, USA) on the wrist (4), and the Apple iPhone 5 (iPhone 5, Apple Inc., Cupertino, CA, USA) on the lateral waist (109). IMU, inertial measurement unit.