year 6, Issue 2 (Summer 2018)                   Ann. Appl. Sport Sci 2018, 6(2): 23-30 | Back to browse issues page

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1- Assistant Professor Faculty of Sport Sciences, Allameh Tabataba'i University, Tehran, Iran , rahman.pt82@gmail.com
2- Professor Health & Sport Medicine Department, University of Tehran, Tehran, Iran
3- Department of Physical Therapy, University of Social Welfare and Rehabilitation, Tehran, Iran
4- Professor Sports Spine Centre, Aspetar Orthopaedic and Sports Hospital, Doha, Qatar. Department of Clinical Therapies, Univerisyt of Limerick, Limerick, Ireland
5- Associate Professor Health & Sport Medicine Department, University of Tehran, Tehran, Iran
6- MSc Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
Abstract:   (430 Views)
Background. The kinematics of a controlled functional task in female volleyball athletes may be an interesting area of study. Therefore, investigating if there are kinematic changes in a jump landing jump task among female athletes with low back pain (LBP) may help therapists and trainers better prevent and/or rehabilitate LBP in athletes.
Objectives. The purpose of this study was to examine lumbopelvic and lower extremity kinematics in athletes with persistent LBP during a jumping task.
Methods. A comparative
cross sectional study conducted in a university research laboratory. Professional female volleyball players with (n = 20) and without (n = 18) LBP were recruited from the Iranian female volleyball league. To reduce heterogeneity, one particular subgroup of athletes with LBP were selected. Kinematic data including lumbar extension, hip flexion, rotation and adduction and knee flexion and abduction angles when the center of mass was at minimum height during a jump-landing-jump maneuver were collected using a Vicon motion analysis system and analysed using MATLAB software. Independent t-tests were used to compare mean values between the groups.
Results. Athletes with LBP had significantly greater hip flexion (LBP: -73.62±11.06˚; Control: -62.88±7.03˚, p=0.016) and significantly less knee flexion (LBP: 77.06±7.27 ˚, Control: 81.62±4.70 ˚, p=0.029) at the lowest point of the jump than athletes without LBP. There were no other significant differences between the groups (p>0.05).
Conclusion. A subgroup of female athletes with LBP display altered lower extremity kinematics during a jump task than athletes without LBP. This may have important implications for lower limb performance and injury.
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APPLICABLE REMARKS
• Mean hip flexion angle in athletes with AE-LBP was significantly different to the control group, as was the mean angle of knee flexion so it is recommended to flex knees more while jump-landing in the training sessions.
• Mean lordosis angle while standing in the group with AE-LBP was significantly higher than in those without LBP, so we recommend cognitive functional exercise therapy to realign the spine in more dynamic positions.

Type of Study: Original Article | Subject: Sport Biomechanics and its related branches
Received: 2017/11/13 | Accepted: 2018/03/1 | Published: 2018/08/18

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