水平和多方向单腿跳跃测试预测前交叉韧带重建术后等速股四头肌和腘绳肌力量
简介
在51例男性单侧ACL重建术后6–8个月的横断面研究中，评估5项单腿跳测试与等速伸屈膝肌力的关系；双下肢等速肌力及单腿跳（SH）、交叉跳距离无显著差异，90°内侧旋转跳距离患侧显著较短，而摘要对三连跳（TH）双下肢差异的表述不一致（一处称无显著差异，一处称患侧显著较短）。患侧60°/s伸膝肌力与SH和TH距离高度相关，线性回归显示SH和TH距离显著预测伸膝及…
英文摘要
BACKGROUND: After anterior cruciate ligament reconstruction (ACLR), isokinetic strength and single-leg hop tests (SLHT) are used to assess return to sport readiness. This study examined the relationships and predictive effects of isokinetic knee extension (Ex) and flexion (Flx) strength with 5 SLHTs at 6 to 8 months post-ACLR. HYPOTHESIS: There would be significant correlation between knee Ex and Flx strengths on the operated side and 5 different SLHTs; SLHTs would significantly predict knee isokinetic Ex and Flx strength. STUDY DESIGN: Cross-sectional study. LEVEL OF EVIDENCE: Level 3. METHODS: Fifty-one male participants underwent unilateral ACLR. Lysholm, International Knee Documentation Committee (IKDC), and Tegner scales were assessed preoperatively and 6 to 8 months postoperatively. At the same follow-up, isokinetic strength at 60°/s, 180°/s, and 240°/s and 5 SLHTs were tested on both limbs. Data were analyzed with paired t tests, Pearson correlations, Fisher's exact test, and simple linear regression; limb symmetry index (LSI) cut-off was ≥85%. RESULTS: Isokinetic strength and single-leg hop (SH), crossover hop, and medial side triple-hop (TH) distances did not differ significantly between limbs (P > 0.05), whereas TH and 90° medial rotation hop distances were significantly shorter on the operated side (P < 0.05). Participants' Lysholm and IKDC scores improved significantly at 6 to 8 months post-ACLR (P < 0.001), but Tegner activity level did not change significantly (P > 0.05). High correlation was found between Ex strength at 60°/s and SH and TH distances on the operated side, and high-moderate correlations were found at 180°/s and 240°/s. Flx strengths showed a similar but slightly lower degree of correlation. Simple linear regression models revealed that especially SH and TH distances significantly predicted both Ex and Flx strengths (adjusted R2 0.26-0.52; P < 0.001). Among the LSI values, only a significant correlation was found between 60°/s Ex and TH LSI ratio (P = 0.01). CONCLUSION: The findings show that SH and TH tests were highly predictive of isokinetic knee strength after ACLR. CLINICAL RELEVANCE: SLHTs after ACLR can be used as a practical and accessible complement to isokinetic measurements.