چکیده:
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.
خلاصه ماشینی:
Altered Lower Limb Kinematics during Jumping amongAthletes with Persistent Low Back Pain1Rahman Sheikhhoseini*, 2Mohammad-Hossein Alizadeh, 3Mahyar Salavati,4,5Kieran O'Sullivan, 2Elham Shirzad, 6Marzieh Movahed1Faculty of Sport Sciences, Allameh Tabataba'i University, Tehran, Iran.
Therefore, investigating if there are kinematic changes in a jump landing jump task among female athleteswith low back pain (LBP) may help therapists and trainers better prevent and/or rehabilitate LBP in athletes.
The purpose of this study was to examine lumbopelvic and lower extremity kinematics in athletes withpersistent LBP during a jumping task.
Kinematic data including lumbar extension, hip flexion, rotation and adduction and knee flexion and abduction angleswhen the center of mass was at minimum height during a in the short-term, their long-term persistence maypredispose people to persistent LBP due tochanges in loading patterns (3).
People with thefollowing conditions were excluded: history ofRed Flags, Body Mass Index (BMI) rangesoutside 18-25 kg/m2, athletes with a high risk ofchronicity based on the StartBack questionnaire(21), an Oswestry Disability Index score higherthan 40%, a history of lumbo-pelvic surgery,spinal surgery or surgery of Anterior/PosteriorCruciate Ligaments (ACL/PCL) of the knee, anylower extremity or abdominal surgery in the lastthree months, pregnancy, menstruation, constantnon-specific diffused pain, pain exacerbatedwhile performing the jump-landing-jumpmaneuver and a pain intensity of above three onthe Visual Analogue Scale (VAS) on the day oftesting.
Although these changes mightarise as an attempt to prevent further injury/pain24 Lower Limb Kinematics in Athletes with Low Back PainSheikhhoseini, R.