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Ten participants were assessed while walking in water and on land with wearable inertial measurement units (IMUs) attached to the right thigh. Longitudinal acceleration, anterior-posterior acceleration, and frontal axis angular velocity were measured at 100 Hz, matched with video analysis sampled at 25 Hz during the walking trials. The longitudinal acceleration showed almost 1 g from initial heel contact to 70% of one cycle, and the anterior-posterior acceleration showed a sinusoidal pattern, synchronizing the approximate posture of the thigh in water. The frontal axis angular velocity fluctuated less while walking in water compared with on land, because thigh motion speed was slower in water than on land. The acceleration and angular velocity in water were stable and did not fluctuate. Walking exercises in water may be effective in individuals with knee- or thigh-related medical issues.
Kaneda, Koichi; Ohgi, Yuji; McKean, Mark; and Burkett, Brendan
"Features of Acceleration and Angular Velocity Using Thigh IMUs during Walking in Water,"
International Journal of Aquatic Research and Education: Vol. 12:
4, Article 12.
Available at: https://scholarworks.bgsu.edu/ijare/vol12/iss4/12
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