@article{ref1,
title="Retention of movement pattern changes after a lower extremity injury prevention program is affected by program duration",
journal="American journal of sports medicine",
year="2012",
author="Padua, Darin A. and Distefano, Lindsay J. and Marshall, Stephen W. and Beutler, Anthony I. and de la Motte, Sarah J. and DiStefano, Michael J.",
volume="40",
number="2",
pages="300-306",
abstract="BACKGROUND: Changes in movement patterns have been repeatedly observed immediately after completing a lower extremity injury prevention program. However, it is not known if movement pattern changes are maintained after discontinuing the training program. HYPOTHESIS: The ability to maintain movement pattern changes after training has ceased may be influenced by the program's duration. The authors hypothesized that among individuals who completed either a 3-month or 9-month training program and who demonstrated immediate movement pattern changes, only those who completed the 9-month training program would maintain movement pattern changes after a 3-month period of no longer performing the exercises. STUDY DESIGN: Cohort study; Level of evidence, 2. <br><br>METHODS: A total of 140 youth soccer athletes from 15 separate teams volunteered to participate. Athletes' movement patterns were assessed using the Landing Error Scoring System (LESS) at pretest, posttest, and 3 months after ceasing the program (retention test). Eighty-four of the original 140 participants demonstrated improvements in their LESS scores between pretest and posttest (change in LESS score >0) and were included in the final analyses for this study (n = 84; 20 boys and 64 girls; mean age, 14 ± 2 years; age range, 11-17 years). Teams performed 3-month (short-duration group) and 9-month (extended-duration group) injury prevention programs. The exercises performed were identical for both groups. Teams performed the programs as part of their normal warm-up routine. <br><br>RESULTS: Although both groups improved their total LESS scores from pretest to posttest, only the extended-duration training group retained their improvements 3 months after ceasing the injury prevention program (F(2,137) = 3.38; P =.04). <br><br>CONCLUSION: Results suggest that training duration may be an important factor to consider when designing injury prevention programs that facilitate long-term changes in movement control.<p /><p>Language: en</p>",
language="en",
issn="0363-5465",
doi="10.1177/0363546511425474",
url="http://dx.doi.org/10.1177/0363546511425474"
}