ACLR后青少年运动员慢速等速股四头肌力量对单腿跳测试表现的影响更大
简介
一项前瞻性队列研究纳入100例青少年ACLR患者（平均15.1岁），在术后6.3个月评估60°/秒、180°/秒和300°/秒下的等速股四头肌肌力与四种跳跃测试对称性的关系。结果显示，仅60°/秒下的肌力对称指数与单脚跳、三连跳和交叉跳显著相关（β=0.44-0.51），而180°/秒和300°/秒无显著影响。临床提示：评估青少年ACLR后重返运动时，应优先…
英文摘要
BACKGROUND: Return-to-play (RTP) criteria remains inconsistent for adolescents following anterior cruciate ligament reconstruction (ACLR). Isokinetic strength testing (ISKT) and functional horizontal hop testing are commonly used to assess readiness, but the optimal ISKT testing protocol for predicting functional performance in adolescents has yet to be defined. HYPOTHESIS/PURPOSE: The purpose of this study was to examine the relationship between quadriceps peak torque at multiple isokinetic testing speeds and functional hop test symmetry. It was hypothesized that strength measured at 60°/sec would demonstrate a stronger association with hop performance than measures obtained at 180°/sec and 300°/sec. STUDY DESIGN: Prospective cohort study. METHODS: One hundred pediatric and adolescent patients (15.1 ± 2.0 yrs) completed a standard RTP assessment at a mean of 6.3 + 0.4 months following ALCR. ISKT was assessed at 60 °/sec, 180 °/sec, 300 °/sec. Hop testing included the single hop for distance, triple hop for distance, crossover hop for distance, and 6-meter timed hop. ISKT values were examined as limb symmetry indices (LSI) and as normalized values (Nm/KG). Multiple linear regression analyses were used to assess the influence of ISKT speed on hop test performance. RESULTS: ISKT LSI at 60 °/sec was significantly associated with single hop (β = 0.508, 95% CI [.18,.75], p = 0.001), triple hop (β = 0.437, 95% CI [.09,.48] p = 0.001), and crossover hop (β = 0.448, 95% CI [.09,.55] p = 0.006). These results were consistent when examining that data as normalized at 60 °/sec for the single hop (β = 0.641, 95% CI [27.4,81.7] p = 0.001), triple hop (β = 0.579, 95% CI [59.9,202.51] p = 0.001), and crossover hop (β = 0.529, 95% CI [46.0,205.8] p = 0.006). ISKT at 180 °/sec and 300 °/sec did not significantly influence hop performance. CONCLUSION: In adolescents following ACLR, quadriceps strength assessed at 60 °/sec, demonstrates the strongest relationship with functional hop test performance. LEVEL OF EVIDENCE: Level 3.