Int J Sports Med
DOI: 10.1055/a-2795-9222
Orthopedics & Biomechanics

Four Months Training with the Football+ and 11+ Improves the Landing Quality of Female Players

Authors

  • Mojtaba Asgari

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)
  • Martin Hägglund

    2   Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden (Ringgold ID: RIN4566)
  • Benedikt Terschluse

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)
  • Maximilian Sueck

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)
  • Kevin Nolte

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)
  • Marcus Schmidt

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)
  • Thomas Jaitner

    1   Institute for Sport and Sport Science, TU Dortmund, Dortmund, Germany (Ringgold ID: RIN14311)

Clinical Trial:

Registration number (trial ID): DRKS00036622, Trial registry: German Clinical Trials Register (https://drks-neu.uniklinik-freiburg.de/), Type of Study: Retrospective-Prospective


Abstract

The effectiveness of the Football+- and 11+-programs in improving landing quality among players with a history of severe ankle or knee injury remains unexplored. This study examined (i) the efficacy of these programs in developing landing assessed via the Landing Error Scoring System (LESS) and (ii) the association between injury history and landing quality. Fifty-six amateur female players (24.12±5.37 y) reported their injury history and completed the LESS test before and after a 4-month intervention. Repeated-measures analysis of variance and independent t-tests analyzed the outcomes at p≤0.05. Players with a history of severe ankle (6.33±1.53; p = 0.019 and d = –0.76) or knee (5.92±0.74; p =0.041, d =–0.77) injury exhibited higher LESS scores compared to the non-injured counterparts (5.25±1.37). Analysis of variance revealed a significant time (p = 0.001 and η 2 = 0.31) and time-group effects (p = 0.002 and η 2 = 0.24) following the 11+ (5.59±1.35 vs. 5.04±1.47) and the Football+ (5.76±1.55 vs. 4.65±1.37). A history of severe knee or ankle injury reduces the landing quality. Both the Football+ and 11+ improved landing, with the Football+ demonstrating greater efficacy. Previously injured players benefited most, although their landing performance remained inferior to non-injured peers. While the injury history is traditionally regarded as a non-modifiable risk factor, targeted neuromuscular programs may partially mitigate its impact on movement quality.



Publication History

Received: 07 May 2025

Accepted after revision: 22 January 2026

Article published online:
19 February 2026

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