Open this publication in new window or tab >>2020 (English)In: Knee Surgery, Sports Traumatology, Arthroscopy, ISSN 0942-2056, E-ISSN 1433-7347, Vol. 28, no 2, p. 528-537Article in journal (Refereed) Published
Abstract [en]
PURPOSE: To evaluate changes in jump-landing technique in football-playing boys and girls after 8 weeks of injury prevention training.
METHODS: Four boys' and four girls' teams (mean age 14.1 ± 0.8 years) were instructed to use either the original Knee Control injury prevention exercise programme (IPEP) or a further developed IPEP, Knee Control + , at every training session for 8 weeks. Baseline and follow-up testing of jump-landing technique included drop vertical jumps (DVJ), assessed subjectively and with two-dimensional movement analysis, and tuck jump assessment (TJA).
RESULTS: Only minor differences in intervention effects were seen between the two IPEPs, and results are therefore presented for both intervention groups combined. At baseline 30% of the boys showed good knee control during the DVJ, normalised knee separation distances of 77-96% (versus hip) and a median of 3 flaws during the TJA. Among girls, 22% showed good knee control, normalised knee separation distances of 67-86% and a median of 4 flaws during the TJA. At follow-up, boys and girls performed significantly more jumps during TJA. No changes in jump-landing technique were seen in boys, whereas girls improved their knee flexion angle at initial contact in the DVJ (mean change + 4.7°, p < 0.001, 95% CI 2.36-6.99, d = 0.7) and their TJA total score (- 1 point, p = 0.045, r = - 0.4).
CONCLUSION: The study showed small positive effects on jump-landing technique in girls, but not in boys, after 8 weeks of injury prevention training.
LEVEL OF EVIDENCE: Level II.
TRIAL REGISTRATION: Clinical Trials gov identifier: NCT03251404.
Keywords
Effect mechanisms, Movement quality, Neuromuscular training
National Category
Sport and Fitness Sciences
Identifiers
urn:nbn:se:liu:diva-160777 (URN)10.1007/s00167-019-05721-x (DOI)000511516100024 ()31541293 (PubMedID)
Note
Funding agencies: Region OstergotlandRegion Auvergne-Rhone-AlpesRegion Bourgogne-Franche-ComteRegion Hauts-de-FranceRegion Nouvelle-Aquitaine [LIO-722051, LIO-527921]; Vetenskapsradet (SE) [2015-02414]; Centrum for Idrottsforskning (SE) [FO2018-0012]; Centrum for Idrottsfo
2019-10-072019-10-072021-04-28