Abstract
The use of wireless sensors to measure motion in non-laboratory settings continues to grow in popularity. Thus far, most validated systems have been applied to measurements in controlled settings and/or for prescribed motions. The aim of this study was to characterize adolescent hip joint motion of elite-level athletes (soccer players) during practice and recreationally active peers (controls) in after-school activities using a magneto-inertial measurement unit (MIMU) system. Opal wireless sensors (APDM Inc., Portland OR, USA) were placed at the sacrum and laterally on each thigh (three sensors total). Hip joint motion was characterized by hip acceleration and hip orientation for one hour of activity on a sports field. Our methods and analysis techniques can be applied to other joints and activities. We also provide recommendations in order to guide future work using MIMUs to pervasively assess joint motions of clinical relevance.
Highlights
Researchers, clinicians and athletes are continuing to increase their use of wireless sensors to measure human movement
magneto-inertial measurement unit (MIMU) measure the magnetic field in the surrounding environment
We developed a new approach for analyzing hip joint motion collected with wireless sensors
Summary
Researchers, clinicians and athletes are continuing to increase their use of wireless sensors to measure human movement. Wireless sensor systems have been validated and used to measure motion for a variety of joints [1,2,3,4,5,6,7,8,9,10,11] with procedures that become increasingly complicated with increasing degrees of freedom [4,10,11]. Inertial measurement units (IMUs) and magneto-inertial measurement units (MIMUs) are arguably the two most popular types of wireless sensors for measuring motion.
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