Abstract
BackgroundIncreased performance from injury prevention exercise programmes (IPEPs) may affect injury risks positively and support the implementation of IPEPs. The primary aim was to study the performance effects of injury prevention exercises from two different IPEPs, the Knee Control IPEP and the further developed Knee Control+ IPEP, in youth male football players, and the secondary aim was to compare potential differences in performance effects between the IPEPs.MethodsFour male youth football teams were tested for agility, hop and sprint performance at the start of the second half of the competitive season and after the end of the 8-week season. Per randomisation, two teams used Knee Control and two teams Knee Control+.ResultsIn total, 47 players executed a median of 13 IPEP sessions (range 11–21 sessions). No improvements in performance were seen in the group as a whole. The intervention groups showed small declines in sprint and agility performance. There was a significant between-group difference in change for the 505 agility test, with improved performance in the Knee Control and worse performance in the Knee Control+ group, ΔKC vs KC+ = − 0.012 (95% CI − 0.19 to −0.04), d = 0.98.ConclusionsNo clinically meaningful performance effects were seen from the Knee Control or Knee Control+ IPEP in youth male athletes and no meaningful differences were seen between Knee Control and Knee Control+ regarding effects on performance tests.Trial registrationClinicalTrials.gov identifier: NCT03251404. Registered on 16 August 2017.
Highlights
High performance in competitive sports is important for obvious reasons
Players who dropped out were significantly heavier at baseline, but no other significant differences were seen between drop-outs and those who completed the study
There was a significant difference in weight change from baseline to follow-up between intervention groups, with larger increase in the players in the Knee Control+ group (1.49 ± 1.17 vs 0.62 ± 1.02 kg, 95% CI 0.22 to 1.52, p = 0.010)
Summary
High performance in competitive sports is important for obvious reasons. There are two primary reasons for studying performance effects of injury prevention exercise (2020) 6:56 programmes (IPEP): (a) improved performance may affect injury risks positively [1] and (b) improved performance may be a key component to improve programme adherence and succeeding with real-life implementation [1]. A recent meta-analysis including 14 studies on different IPEPs, predominantly in football players, showed positive performance effects favouring the interventions regarding balance/postural stability, strength, sprint ability and speed [6]. Increased performance from injury prevention exercise programmes (IPEPs) may affect injury risks positively and support the implementation of IPEPs. The primary aim was to study the performance effects of injury prevention exercises from two different IPEPs, the Knee Control IPEP and the further developed Knee Control+ IPEP, in youth male football players, and the secondary aim was to compare potential differences in performance effects between the IPEPs
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