Effects of barbell back squat stance width on sagittal and frontal hip and knee kinetics
Effects of barbell back squat stance width on sagittal and frontal hip and knee kinetics
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DOI：
10.1111/sms.13305
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发表时间：
2019-01-01
影响因子：
4.1
通讯作者：
Ahtiainen, Juha P.
中科院分区：
文献类型：
--
作者：
Lahti, Johan;Hegyi, Andras;Ahtiainen, Juha P.
不同的立场宽度时，通常利用完成杠铃后蹲在运动一般准备训练。宽度操作被认为影响矢状面刺激髋和膝伸肌，在蹲的主要伸肌肌肉组织。然而，宽度操纵如何影响额面刺激的了解较少。髋关节和膝关节净关节力矩（NJM）的知识可以改善运动选择时，旨在提高运动的具体性能和防止受伤。本研究招募了14名成人业余橄榄球运动员。经过一段时间的熟悉，参与者进行宽（宽，1.5倍大转子宽度）和窄的立场（窄，1倍大转子宽度）杠铃后蹲股骨平行的深度，使用相对负载的70%和85%的一次重复最大。比较不同宽度之间的矢状面和额面髋关节和膝关节动力学和运动学。采用0.01的Bonferroni校正α作为统计学显著性的阈值。NARROW组的膝关节屈曲角度在统计学上大于WIDE组（P < 0.0001，d = 2.56-2.86）;两种条件之间的髋关节屈曲角度无统计学差异（P = 0.049-0.109，d = 0.33-0.38）。髋膝关节伸展NJM比和膝关节内收NJM在WIDE组显著高于NARROW组（P < 0.007，d = 0.51-1.41）。在股骨平行，站姿宽度操纵杠铃后蹲可以提供实质性的差异，在矢状面和额状面的生物力学刺激。在某些情况下，这些差异可能有临床相关的纵向影响，从性能和损伤预防的角度来看，这是讨论。
Different stance widths are commonly utilized when completing the barbell back squat during athletic general preparedness training. Width manipulation is thought to influence sagittal plane stimuli to the hip and knee extensors, the primary extensor musculature in the squat. However, how width manipulation affects frontal plane stimuli is less understood. Knowledge of hip and knee net joint moments (NJM) could improve exercise selection when aiming to improve sport-specific performance and prevent injuries. Fourteen adult amateur rugby athletes were recruited for this study. After a familiarization period, participants performed wide- (WIDE, 1.5x greater trochanter width) and narrow-stance (NARROW, 1x greater trochanter width) barbell back squats to femur parallel depth, using relative loads of 70% and 85% of one-repetition maximum. Sagittal and frontal plane hip and knee kinetics and kinematics were compared between widths. A Bonferroni-corrected alpha of 0.01 was employed as the threshold for statistical significance. Knee flexion angle was statistically greater in NARROW than WIDE (P < 0.0001, d = 2.56-2.86); no statistical differences were observed for hip flexion angle between conditions (P = 0.049-0.109, d = 0.33-0.38). Hip-to-knee extension NJM ratios and knee adduction NJMs were statistically greater in WIDE than NARROW (P < 0.007, d = 0.51-1.41). At femur parallel, stance width manipulation in the barbell back squat may provide substantial differences in biomechanical stimulus in both the sagittal plane and the frontal plane. In certain contexts, these differences may have clinically relevant longitudinal implications, from both a performance and a injury prevention standpoint, which are discussed.