Alli Gokeler1, Anne Benjaminse2, Wouter Welling3, Malou Alferink3, Peter Eppinga4, Bert Otten3. 1. University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands. Electronic address: a.gokeler@rug.nl. 2. University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands; School of Sport Studies, Hanze University Groningen, Zernikeplein 17, 9747 AS Groningen, The Netherlands. 3. University of Groningen, University Medical Center Groningen, Center for Human Movement Sciences, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands. 4. Flytta Physical Therapy, Center for Sports and Rehabilitation, Boumaboulevard 41, 9723 ZS Groningen, The Netherlands; FC Groningen, Professional Dutch Soccer Club, Boumaboulevard 41, 9723 ZS Groningen, The Netherlands.
Abstract
OBJECTIVES: The purpose of this study was to determine the effect of an internal and external attentional focus on single leg hop jump distance and knee kinematics in patients after ACL reconstruction (ACLR). DESIGN: Experimental. SETTING: Outpatient physical therapy facility. PARTICIPANTS: Sixteen patients after ACLR. MAIN OUTCOME MEASURES: Patients received either an instruction with an internal focus or an external focus before performing a single leg hop jump. The jump distance, knee valgus angle at initial contact, peak knee valgus angle, knee flexion angle at initial contact, peak knee flexion angle, total ROM and time to peak angles for the injured and non-injured legs were recorded. A repeated measures MANOVA was used to determine significance between the experimental conditions with the primary outcome measures as dependent variables. RESULTS: The external focus group had significant larger knee flexion angles at initial contact, peak knee flexion, total ROM and time to peak knee flexion for the injured legs. CONCLUSIONS: This study demonstrates the applicability of using an external focus during rehabilitation of patients after ACLR to enhance safer movement patterns compared to an internal focus of attention and subsequently may help to reduce second ACL injury risk.
OBJECTIVES: The purpose of this study was to determine the effect of an internal and external attentional focus on single leg hop jump distance and knee kinematics in patients after ACL reconstruction (ACLR). DESIGN: Experimental. SETTING:Outpatient physical therapy facility. PARTICIPANTS: Sixteen patients after ACLR. MAIN OUTCOME MEASURES: Patients received either an instruction with an internal focus or an external focus before performing a single leg hop jump. The jump distance, knee valgus angle at initial contact, peak knee valgus angle, knee flexion angle at initial contact, peak knee flexion angle, total ROM and time to peak angles for the injured and non-injured legs were recorded. A repeated measures MANOVA was used to determine significance between the experimental conditions with the primary outcome measures as dependent variables. RESULTS: The external focus group had significant larger knee flexion angles at initial contact, peak knee flexion, total ROM and time to peak knee flexion for the injured legs. CONCLUSIONS: This study demonstrates the applicability of using an external focus during rehabilitation of patients after ACLR to enhance safer movement patterns compared to an internal focus of attention and subsequently may help to reduce second ACL injury risk.
Authors: Sandra J Shultz; Randy J Schmitz; Anne Benjaminse; Malcolm Collins; Kevin Ford; Anthony S Kulas Journal: J Athl Train Date: 2015-09-04 Impact factor: 2.860
Authors: Alli Gokeler; Marsha Bisschop; Gregory D Myer; Anne Benjaminse; Pieter U Dijkstra; Helco G van Keeken; Jos J A M van Raay; Johannes G M Burgerhof; Egbert Otten Journal: Knee Surg Sports Traumatol Arthrosc Date: 2014-10-14 Impact factor: 4.342
Authors: Daniel K Schneider; Alli Gokeler; Egbert Otten; Kevin R Ford; Timothy E Hewett; Jon G Divine; Angelo J Colosimo; Robert S Heidt; Gregory D Myer Journal: J Strength Cond Res Date: 2017-09 Impact factor: 3.775