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Background <p>Time-constrained decision-making during athletic movement can impair knee mechanics, potentially increasing risk for anterior cruciate ligament (ACL) tears. This study compared the effects of unanticipated single-leg landings on landing stability, safety, and decision-making success in ACLR and uninjured athletes.</p> Methods <p>Matched-pair cross-sectional data from 14&#xa0;ACLR (females: <i>n</i> = 6, age: 23 ± 5, BMI: 23 ± 4 kg/m<sup>2</sup>, Tegner activity score: 8 ± 1; time since surgery: &lt; 2&#xa0;years) and 14&#xa0;healthy controls (females: <i>n</i> = 6, age: 26 ± 3, BMI: 22 ± 2 kg/m<sup>2</sup>, TAS: 8 ± 2) were analysed using a&#xa0;two-factorial ANOVA. Participants performed countermovement-jumps with unanticipated (landing side shown after take-off, time-constrained) and anticipated (landing side displayed before take-off, no time-constraints) single-leg landings on HUMAC force plates. Landing stability and safety were assessed via center of pressure path length (CoP), time to stabilization (TTS), vertical peak ground reaction force (pGRF) and time to pGRF. Unanticipated decision-making success was measured using erroneous landings (wrong foot/both feet).</p> Results <p>Significant effects for group were found for CoP (<i>p</i> = 0.011) and pGRF (<i>p</i> = 0.020). Post-hoc tests showed lower values for the ACLR-group compared to controls during the unanticipated condition for both CoP (<i>p</i> = 0.012) and pGRF (<i>p</i> = 0.049). No significant effects were observed for landing condition, the group x landing condition interaction, or for TpGRF and TTS.</p> Conclusions <p>These findings suggest that the ACLR-group used a&#xa0;more cautious landing technique, likely to protect the knee joints, especially under unanticipated conditions, potentially compensating for loads. Future studies should explore how unanticipated tasks impact knee kinematics and kinetics to better understand their role in ACL (re-)injury prevention.</p>

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Do peak ground reaction forces, postural stability and decision-making success during unanticipated jump-landings differ between individuals with ACL-reconstruction and healthy controls?

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年3月10日

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  • Evans Yayra Kwaku Ashigbi,
  • Florian Giesche,
  • Daniel Niederer,
  • Lena Weßler,
  • David Friebe,
  • David Alexander Groneberg,
  • Winfried Banzer

摘要

Background

Time-constrained decision-making during athletic movement can impair knee mechanics, potentially increasing risk for anterior cruciate ligament (ACL) tears. This study compared the effects of unanticipated single-leg landings on landing stability, safety, and decision-making success in ACLR and uninjured athletes.

Methods

Matched-pair cross-sectional data from 14 ACLR (females: n = 6, age: 23 ± 5, BMI: 23 ± 4 kg/m2, Tegner activity score: 8 ± 1; time since surgery: < 2 years) and 14 healthy controls (females: n = 6, age: 26 ± 3, BMI: 22 ± 2 kg/m2, TAS: 8 ± 2) were analysed using a two-factorial ANOVA. Participants performed countermovement-jumps with unanticipated (landing side shown after take-off, time-constrained) and anticipated (landing side displayed before take-off, no time-constraints) single-leg landings on HUMAC force plates. Landing stability and safety were assessed via center of pressure path length (CoP), time to stabilization (TTS), vertical peak ground reaction force (pGRF) and time to pGRF. Unanticipated decision-making success was measured using erroneous landings (wrong foot/both feet).

Results

Significant effects for group were found for CoP (p = 0.011) and pGRF (p = 0.020). Post-hoc tests showed lower values for the ACLR-group compared to controls during the unanticipated condition for both CoP (p = 0.012) and pGRF (p = 0.049). No significant effects were observed for landing condition, the group x landing condition interaction, or for TpGRF and TTS.

Conclusions

These findings suggest that the ACLR-group used a more cautious landing technique, likely to protect the knee joints, especially under unanticipated conditions, potentially compensating for loads. Future studies should explore how unanticipated tasks impact knee kinematics and kinetics to better understand their role in ACL (re-)injury prevention.