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Effects of unweighting on gait kinematics during walking on a lower-body positive-pressure treadmill in patients with hip osteoarthritis

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Title: Effects of unweighting on gait kinematics during walking on a lower-body positive-pressure treadmill in patients with hip osteoarthritis
Authors: Kataoka, Yoshiaki Browse this author
Shimizu, Tomohiro Browse this author →KAKEN DB
Takeda, Ryo Browse this author
Tadano, Shigeru Browse this author
Saito, Yuki Browse this author
Osuka, Satoshi Browse this author
Ishida, Tomoya Browse this author
Samukawa, Mina Browse this author →KAKEN DB
Irie, Tohru Browse this author →KAKEN DB
Takahashi, Daisuke Browse this author →KAKEN DB
Iwasaki, Norimasa Browse this author →KAKEN DB
Tohyama, Harukazu Browse this author →KAKEN DB
Keywords: Osteoarthritis
Hip joint
Issue Date: 8-Jan-2021
Publisher: BioMed Central
Journal Title: BMC musculoskeletal disorders
Volume: 22
Issue: 1
Start Page: 46
Publisher DOI: 10.1186/s12891-020-03909-8
Abstract: BackgroundHip osteoarthritis (OA) is a musculoskeletal condition that makes walking difficult due to pain induced by weight-bearing activities. Treadmills that support the body weight (BW) reduce the load on the lower limbs, and those equipped with a lower-body positive-pressure (LBPP) device, developed as a new method for unweighting, significantly reduce pain in patients with knee OA. However, the effects of unweighting on gait kinematics remain unclear in patients with hip OA. Therefore, we investigated the effects of unweighting on kinematics in patients with hip OA during walking on a treadmill equipped with an LBPP device.MethodsA total of 15 women with hip OA and 15 age-matched female controls wore a three-dimensional (3-D) motion analysis system and walked at a self-selected speed on the LBPP treadmill. Data regarding self-reported hip pain using a numeric rating scale (NRS) in which the scores 0 and 10 represented no pain and the worst pain, respectively, under three different BW conditions (100, 75, and 50%) were collected. Moreover, 3-D peak joint angles during gait under each condition were calculated and compared.ResultsIn the hip OA group, the NRS pain scores at 50 and 75% BW conditions significantly decreased compared with that at 100% BW condition (50%, P =0.002; 75%, P =0.026), and the peak hip extension angle decreased compared with that in the healthy controls (P =0.044). In both groups, unweighting significantly decreased the peak hip (P <0.001) and knee (P <0.001) flexion angles and increased the peak ankle plantar flexion angle (P <0.001) during walking.ConclusionsUnweighting by the LBPP treadmill decreased pain in the hip OA group but did not drastically alter the gait kinematics compared with that in the control group. Therefore, regarding the use of the LBPP treadmill for patients with hip OA, clinicians should consider the benefits of pain reduction rather than the kinematic changes.
Type: article
Appears in Collections:国際連携研究教育局 : GI-CoRE (Global Institution for Collaborative Research and Education : GI-CoRE) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
北海道大学病院 (Hokkaido University Hospital) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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