Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program
# Background The 11+ program prevents anterior cruciate ligament (ACL) injuries in athletes through unknown mechanisms. # Purpose The aim of the current study was to evaluate the effects of The 11+ intervention program, performed by female soccer players during a single season, on the frequency...
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| Format: | Article |
| Language: | English |
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North American Sports Medicine Institute
2022-08-01
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| Series: | International Journal of Sports Physical Therapy |
| Online Access: | https://doi.org/10.26603/001c.36524 |
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| _version_ | 1825196983596351488 |
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| author | Haraldur B Sigurðsson Kristín Briem Karin Grävare Silbernagel Lynn Snyder-Mackler |
| author_facet | Haraldur B Sigurðsson Kristín Briem Karin Grävare Silbernagel Lynn Snyder-Mackler |
| author_sort | Haraldur B Sigurðsson |
| collection | DOAJ |
| description | # Background
The 11+ program prevents anterior cruciate ligament (ACL) injuries in athletes through unknown mechanisms.
# Purpose
The aim of the current study was to evaluate the effects of The 11+ intervention program, performed by female soccer players during a single season, on the frequency of Early Peaks during athletic tasks.
# Methods
Three teams (69 players) of collegiate female soccer athletes (Divisions I and II) were recruited. Two teams (49 players) volunteered to perform The 11+ three times per week for one season (~22 weeks plus three weeks pre-season), and one team (20 players) served as controls. The athletes performed three repetitions of a cutting maneuver, side shuffle direction change, and forwards to backwards running direction change before and after the competitive season and were recorded using marker-based 3D motion capture. Knee valgus moment time series were calculated for each repetition with inverse kinematics and classified as either “Very Early Peak”, “Early Peak” or “other” using cluster analysis. The classification was based timing of the peak relative to the timing of ACL injuries. The effect of the intervention on the frequency of Very Early Peaks and Early Peaks was evaluated with a mixed Poisson regression controlling for the movement task and pre-season frequency.
# Results
The 11+ intervention reduced the frequency of Early Peak knee valgus moment in one intervention team (coefficient = -1.16, p = 0.004), but not the other (coefficient = -0.01, p = 0.977). No effect was observed on the frequency of Very Early Peak knee valgus moment.
# Conclusions
Reduced frequency of knee valgus moment Early Peak during athletic tasks may explain the mechanism by which The 11+ program decreases risk of ACL injury. Prospective studies with a much larger sample size are required to establish a link between Early Peak knee valgus moments and risk of ACL injury.
# Level of evidence
2b |
| format | Article |
| id | doaj-art-02c75c81d0df4caa9b52d1435638e772 |
| institution | Kabale University |
| issn | 2159-2896 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | North American Sports Medicine Institute |
| record_format | Article |
| series | International Journal of Sports Physical Therapy |
| spelling | doaj-art-02c75c81d0df4caa9b52d1435638e7722025-02-11T20:27:23ZengNorth American Sports Medicine InstituteInternational Journal of Sports Physical Therapy2159-28962022-08-01175Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ ProgramHaraldur B SigurðssonKristín BriemKarin Grävare SilbernagelLynn Snyder-Mackler# Background The 11+ program prevents anterior cruciate ligament (ACL) injuries in athletes through unknown mechanisms. # Purpose The aim of the current study was to evaluate the effects of The 11+ intervention program, performed by female soccer players during a single season, on the frequency of Early Peaks during athletic tasks. # Methods Three teams (69 players) of collegiate female soccer athletes (Divisions I and II) were recruited. Two teams (49 players) volunteered to perform The 11+ three times per week for one season (~22 weeks plus three weeks pre-season), and one team (20 players) served as controls. The athletes performed three repetitions of a cutting maneuver, side shuffle direction change, and forwards to backwards running direction change before and after the competitive season and were recorded using marker-based 3D motion capture. Knee valgus moment time series were calculated for each repetition with inverse kinematics and classified as either “Very Early Peak”, “Early Peak” or “other” using cluster analysis. The classification was based timing of the peak relative to the timing of ACL injuries. The effect of the intervention on the frequency of Very Early Peaks and Early Peaks was evaluated with a mixed Poisson regression controlling for the movement task and pre-season frequency. # Results The 11+ intervention reduced the frequency of Early Peak knee valgus moment in one intervention team (coefficient = -1.16, p = 0.004), but not the other (coefficient = -0.01, p = 0.977). No effect was observed on the frequency of Very Early Peak knee valgus moment. # Conclusions Reduced frequency of knee valgus moment Early Peak during athletic tasks may explain the mechanism by which The 11+ program decreases risk of ACL injury. Prospective studies with a much larger sample size are required to establish a link between Early Peak knee valgus moments and risk of ACL injury. # Level of evidence 2bhttps://doi.org/10.26603/001c.36524 |
| spellingShingle | Haraldur B Sigurðsson Kristín Briem Karin Grävare Silbernagel Lynn Snyder-Mackler Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program International Journal of Sports Physical Therapy |
| title | Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program |
| title_full | Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program |
| title_fullStr | Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program |
| title_full_unstemmed | Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program |
| title_short | Don’t Peak Too Early: Evidence for an ACL Injury Prevention Mechanism of the 11+ Program |
| title_sort | don t peak too early evidence for an acl injury prevention mechanism of the 11 program |
| url | https://doi.org/10.26603/001c.36524 |
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