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Background <p>This retrospective study investigates functional fitness and return to sport (RTS) after anterior cruciate ligament (ACL) reconstruction at an acute care hospital. ACL injury often leads to functional knee impairment. Modern rehabilitation focuses on individualized, functional criteria rather than fixed time intervals to ensure a&#xa0;safe RTS.</p> Objective <p>What is the functional and psychological status of patients approximately 1&#xa0;year postsurgery based on the Knee Injury and Osteoarthritis Outcome Score (KOOS), ACL-RSI (RSI: Return to Sport after Injury scale), and RTS tests? Which factors influence the return to sport?</p> Materials and methods <p>A total of 149 patients (aged 18–60) with isolated ACL reconstruction were retrospectively analyzed using KOOS, ACL-RSI, and a&#xa0;standardized test battery (including strength, jumping ability, and balance). The Limb Symmetry Index (LSI) with a&#xa0;90% cut-off was used for functional assessment.</p> Results <p>Significant and clinically relevant improvements in pain, function, and psychological readiness were observed across all age groups, especially in sports participation and quality of life. Limited single-leg jumping performance, especially in middle adulthood, and functional deficits under fatigue proved to be key limiting factors for athletic performance. Return to sport was significantly influenced by subjective sports function and psychological readiness, which were strongly correlated (KOOS Sport–ACL-RSI: ρ = 0.56; <i>p</i> &lt; 0.001), while objective functional parameters such as single-leg jump performance were moderately or weakly associated.</p> Conclusion <p>The combination of objective tests and psychological evaluation is essential for a&#xa0;safe RTS. Rehabilitation should specifically address functional deficits in middle-aged individuals.</p>

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„Return to sport“ (RTS) nach Kreuzbandoperation

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Christoph Andreas Oratsch,
  • Vinzenz Smekal

摘要

Background

This retrospective study investigates functional fitness and return to sport (RTS) after anterior cruciate ligament (ACL) reconstruction at an acute care hospital. ACL injury often leads to functional knee impairment. Modern rehabilitation focuses on individualized, functional criteria rather than fixed time intervals to ensure a safe RTS.

Objective

What is the functional and psychological status of patients approximately 1 year postsurgery based on the Knee Injury and Osteoarthritis Outcome Score (KOOS), ACL-RSI (RSI: Return to Sport after Injury scale), and RTS tests? Which factors influence the return to sport?

Materials and methods

A total of 149 patients (aged 18–60) with isolated ACL reconstruction were retrospectively analyzed using KOOS, ACL-RSI, and a standardized test battery (including strength, jumping ability, and balance). The Limb Symmetry Index (LSI) with a 90% cut-off was used for functional assessment.

Results

Significant and clinically relevant improvements in pain, function, and psychological readiness were observed across all age groups, especially in sports participation and quality of life. Limited single-leg jumping performance, especially in middle adulthood, and functional deficits under fatigue proved to be key limiting factors for athletic performance. Return to sport was significantly influenced by subjective sports function and psychological readiness, which were strongly correlated (KOOS Sport–ACL-RSI: ρ = 0.56; p < 0.001), while objective functional parameters such as single-leg jump performance were moderately or weakly associated.

Conclusion

The combination of objective tests and psychological evaluation is essential for a safe RTS. Rehabilitation should specifically address functional deficits in middle-aged individuals.