Reece Madeleine B, Arnold Graham P, Nasir Sadiq, Wang Weijie W, Abboud Rami
nstitute of Motion Analysis & Research (IMAR), University of Dundee, Dundee, UK.
Dean's Office, University of Balamand Faculty of Engineering, El-Koura, Lebanon.
BMJ Open Sport Exerc Med. 2020 Feb 4;6(1):e000610. doi: 10.1136/bmjsem-2019-000610. eCollection 2020.
This study aimed to determine whether looped resistance bands affect knee kinematics and lower body muscle activation during the barbell back squat.
Twenty-six healthy participants (13 female, 13 male) calculated their one repetition maximum (RM) prior to data collection. Each participant performed three squats at both 80% and 40% 1RM wearing a light resistance band, an extra-heavy resistance band and no resistance band.Vicon 3D motion analysis cameras were used to collect the kinematic data, and Delsys Trigno Lab wireless electromyography (EMG) system was used to measure vastus medialis, vastus lateralis, gluteus maximus, gluteus medius and biceps femoris muscle activity. Peak knee flexion angle, peak knee valgus angle and maximum tibial rotation values were examined. Peak EMG values were also analysed after being normalised and expressed as a percentage of maximum voluntary contraction (MVC).
Gluteus maximus (GM) activity is significantly increased when a resistance band is used during squatting. However, squatting with a resistance band is detrimental to knee kinematics as it leads to an increase in knee valgus angle and maximum tibial rotation angle. A direct correlation is recorded between an increase in resistance and an increase in these two angles.
Squatting with resistance bands is likely to increase the risk of knee injury. Coaches and clinicians who already implement this technique are advised to remove resistance band squats from training and rehabilitation programmes. Further research evaluating the long-term effects of using resistance bands during the barbell back squat should be considered.
本研究旨在确定环形弹力带是否会影响杠铃后深蹲时的膝关节运动学和下肢肌肉激活情况。
26名健康参与者（13名女性，13名男性）在数据收集前计算出他们的一次重复最大值（1RM）。每位参与者在佩戴轻弹力带、特重弹力带和不佩戴弹力带的情况下，分别以80%和40%的1RM进行三次深蹲。使用Vicon 3D运动分析摄像头收集运动学数据，使用Delsys Trigno Lab无线肌电图（EMG）系统测量股内侧肌、股外侧肌、臀大肌、臀中肌和股二头肌的肌肉活动。检查膝关节屈曲峰值角度、膝关节外翻峰值角度和最大胫骨旋转值。对肌电图峰值进行标准化分析后，将其表示为最大自主收缩（MVC）的百分比。
深蹲时使用弹力带会显著增加臀大肌（GM）的活动。然而，使用弹力带深蹲对膝关节运动学有害，因为它会导致膝关节外翻角度和最大胫骨旋转角度增加。阻力增加与这两个角度的增加之间存在直接相关性。
使用弹力带深蹲可能会增加膝关节受伤的风险。建议已经采用这种训练方法的教练和临床医生在训练和康复计划中取消弹力带深蹲。应考虑进一步研究评估在杠铃后深蹲时使用弹力带的长期影响。
