Supervisors info:
Μπουντόλος Κωνσταντίνος, Καθηγητής, Τμήμα Επιστήμης Φυσικής Αγωγής και Αθλητισμού, Εθνικό Καποδιστριακό Πανεπιστήμιο Αθηνών
Summary:
Introduction: Athletic efforts create significant loads, which induce injuries, with emphasis on the lower limb and especially the knee joint. In the context of recovery of affected limb, i.e. the knee with reconstruction of the anterior crucial ligament, the periodic appraisal contributes significantly to the complete recovery. The aim of study was to compare single-leg and double-leg landing from high jump and the kinematics appraisal of the sagittal plane.
Method: Seven (7) men and one (1) woman aged 25.4 ± 2.8 years, height 180.0 ± 10 cm, body mass 80.8 ± 14.9 kg and ΒΜΙ 24.7 ± 2.6, with amateur level of sport and six (6) of them with surgery on the right leg and being on average 34 months from the day of surgery performed high jump and the efforts (10 each condition, i.e. A-with double-leg, B-with the healthy, C- with the operated) were recorded with frequency 30Hz, while 2/dimensional analysis was performed with software Kinovea and Logger Pro. The analysis was performed at the sagittal plane, for the purpose of calculate the angular displacement of the knee during the landing phase. By comparison means (t-test, p<.05) the results are given.
Results: The angular displacement of the knee in the double-legs landing was 89.6 ± 16.0 degrees, in the single-leg landing of the operated limb was 105.4 ± 13.5 degrees, while of the healthy limb was 102.0 ± 13.4 degrees, with the variability ranging between 13.5 and 18.6%. The comparison between the conditions showed significant difference p< .01, i.e. between double-leg landing with both the operated leg and the healthy leg.
Discussion/Conclusion: The sagittal angular displacement of knee is a criterion for the attempt of the appraisal of the retreat of the leg, when the landing become from height, with which assess the recovery of individuals. For further study will have interest the frontal appraisal of knee or and the combination of appraisal of the ground reaction forces during the landing.
Keywords:
Kinematics, ACL, Landing, Single-leg, sagittal-plane
