Ghorbani Moosareza, Nouri Hamed, Heydarian Mona, Mottaghitalab Mohammad, Zarei Hamed
Corrective Exercises and Sports Injury Department, Faculty of Physical Education & sport sciences, University of Guilan, Rasht, Iran.
Faculty of Physical Education and Sport Sciences, Allameh Tabataba'i University, Tehran, Iran.
BMC Sports Sci Med Rehabil. 2024 Oct 25;16(1):221. doi: 10.1186/s13102-024-01012-2.
Fatigue leads to an acute decline in muscle strength, altered patterns of lower extremity muscle activation, changes in hip and knee kinematics. In terms of the effects of fatigue on knee joint kinematics during plyometric training, there is still a lack of knowledge regarding kinematic differences between athletes who passed the ACL reconstructions rehabilitation period and healthy athletes. Therefore, this study aimed to compare lower limb joint kinematic parameters between reconstructed cruciate ligament and healthy control soccer players during jump landing in a fatigued setting.
Lower limb kinematic parameters were recorded in 20 professional soccer players (age, 24.95 ± 2.92 years; body mass, 77.20 ± 12.88 kg; height, 1.77 ± 3.19 m) during jump landing task before and after the fatigue protocol. The control group consisted of healthy subjects and the experimental group consisted of subjects with ACL reconstruction by thigh transplantation. Kinematic data was recorded with 4 cameras to measure lower limb angles at first foot contact and maximum range of motion.
The results showed that before fatigue, there was only a significant difference between the two groups in the maximum range of motion of the non-involved hip joint (P = 0.022) and angle of the involved hip at first contact (P = 0.049). In other data on joint range of motion or initial contact angle, no significant difference was observed between the two groups (P > 0.05). After fatigue protocol, there was a significant difference in initial foot contact in non-involved (P = 0.030), and involved (P = 0.020) hip joint angles between the two groups. However, no significant difference in initial contact angle or range of motion of other joints was observed between the groups.
This study shows that plyometric fatigue does not contribute to numerous changes in contact angles and range of motion in lower extremity joints in healthy soccer players and those with a history of cruciate ligament repairs.
疲劳会导致肌肉力量急剧下降、下肢肌肉激活模式改变、髋部和膝部运动学变化。就疲劳对增强式训练期间膝关节运动学的影响而言，对于通过前交叉韧带（ACL）重建康复期的运动员与健康运动员之间的运动学差异仍缺乏了解。因此，本研究旨在比较疲劳状态下跳跃着陆时重建十字韧带的足球运动员和健康对照足球运动员的下肢关节运动学参数。
在20名职业足球运动员（年龄24.95±2.92岁；体重77.20±12.88千克；身高1.77±3.19米）进行疲劳方案前后的跳跃着陆任务期间，记录其下肢运动学参数。对照组由健康受试者组成，实验组由通过大腿移植进行ACL重建的受试者组成。使用4台摄像机记录运动学数据，以测量首次足部接触时的下肢角度和最大运动范围。
结果表明，疲劳前，两组之间仅在未受伤髋关节的最大运动范围（P = 0.022）和首次接触时受伤髋关节的角度（P = 0.049）存在显著差异。在其他关于关节运动范围或初始接触角度的数据中，两组之间未观察到显著差异（P>0.05）。疲劳方案后，两组之间在未受伤（P = 0.030）和受伤（P = 0.020）髋关节角度的首次足部接触方面存在显著差异。然而，两组之间在其他关节的初始接触角度或运动范围方面未观察到显著差异。
本研究表明，增强式疲劳不会导致健康足球运动员和有十字韧带修复史的运动员下肢关节接触角度和运动范围发生大量变化。
