title: Lower limb joint motion during a cross cutting movement differs in individuals with and without chronic ankle instability.
abstract: OBJECTIVE
  To compare the kinematics of lower limb joints between individuals with and without chronic ankle instability (CAI) during cross-turn and -cutting movements.
  
  
  METHODS
  Cross-sectional study.
  
  
  METHODS
  Motion analysis laboratory.
  
  
  METHODS
  Twelve subjects with CAI and twelve healthy controls.
  
  
  METHODS
  Hip flexion, adduction, and internal rotation, knee flexion, and ankle dorsiflexion and inversion angles were calculated in the 200 ms before initial ground contact and from initial ground contact to toe-off (stance phase) in a cross-turn movement during gait and a cross-cutting movement from a forward jump, and compared across the two groups.
  
  
  RESULTS
  In the cross-cutting movement, the CAI group exhibited greater hip and knee flexion than the control group during the stance phase, and more hip abduction during the period before initial contact and the stance phase. In the cross-turn movement the joint kinematics were similar in the two groups.
  
  
  CONCLUSIONS
  CAI subjects exhibited an altered pattern of the proximal joint kinematics during a cross-cutting movement. It is important for clinicians to assess the function of the hip and knee as well as the ankle, and to incorporate coordination training for the entire lower limb into rehabilitation after lateral ankle sprains.
authors.affiliation: Graduate School of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan; Rehabilitation Center, NTT East Japan Sapporo Hospital, West-15, South-1, Chuo-ku, Sapporo 060-0061, Japan.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Koshino
authors.affiliation: Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan; Hokuto Endowed Chair in Prevention of Joint Disease, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan. Electronic address: yamanaka@hs.hokudai.ac.jp.
authors.forename: Masanori
authors.initials: M
authors.lastname: Yamanaka
authors.affiliation: Graduate School of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan.
authors.forename: Yuya
authors.initials: Y
authors.lastname: Ezawa
authors.affiliation: Graduate School of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan; Department of Rehabilitation, Hokushin Orthopedic Hospital, 3-1-18, Kikusui Motomachi 3 jo, Shiroishi-ku, Sapporo 003-0823, Japan.
authors.forename: Tomoya
authors.initials: T
authors.lastname: Ishida
authors.affiliation: Hokuto Endowed Chair in Prevention of Joint Disease, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Kobayashi
authors.affiliation: Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan.
authors.forename: Mina
authors.initials: M
authors.lastname: Samukawa
authors.affiliation: Department of Rehabilitation Science, Faculty of Health Sciences, Hokkaido University, West-5, North-12, Kita-ku, Sapporo 060-0812, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Saito
authors.affiliation: Department of Orthopedic Surgery, Hokuto Hospital, 7-5, Inada-cho Kisen, Obihiro 080-0833, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Takeda
mesh_terms: D000328:Adult; D000843:Ankle Joint / Q000503:physiopathology; D001696:Biomechanical Phenomena; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D005260:Female; D006621:Hip Joint / Q000503:physiopathology; D006801:Humans; D007593:Joint Instability / Q000503:physiopathology*; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D009068:Movement / Q000502:physiology*; D013177:Sports / Q000502:physiology*; D055815:Young Adult
keywords: Ankle sprain; Biomechanics; Neuromuscular control; Proximal joints