Background

Change in the lower extremity alignments in the frontal plane and muscle activation patterns have been associated with lower extremity injuries. Therefore, to prevent injuries, many therapeutic protocols focus on find ways to correct dynamic knee valgus (DKV).

Methods

Thirty-one recreational male cyclists with DKV (26.4 ± 4.5 years, 176.63 ± 7.51 cm, 75.81 ± 9.29 kg, 23.20 ± 4.15 kg/m2) volunteered to participate in this study. A motion analysis system and a surface Electromyography were used to collect ten cycles of three-dimensional kinematics and muscles activity during 2 min of pedaling in each of four testing conditions. The paired t-test was used for statistical analysis (p < 0.05).

Results

The results indicated significant differences in VM (band = 0.029, no band = 0.031) and VL (band = 0.015, no band = 0.035) activation between workloads in each condition. Also there were significant differences in Gmed activation (0.5kg = 0.001, 2kg = 0.037), onset of Gmed (0.5kg = 0.048, 2kg = 0.012), offset of Gmed (0.5kg = 0.048, 2kg = 0.015), TFL activation (0.5kg = 0.001, 2kg = 0.041) and offset of TFL (0.5kg = 0.078, 2kg = 0.005) between the band and no band conditions. There was no different significant in VM/VL ratio between in each of four testing conditions (p > 0.05). The Gmed/TFL ratio was significantly greater in band condition than no band at both 0.5 (p = 0.045) and 2 kg (p = 0.001) workload. Knee abduction angle was affected by the band loop during the pedaling at two different workloads (0.5 kg: p = 0.047, 2 kg: p = 0.021) but mean (p = 0.027) and peak (p = 0.033) knee abduction angle significantly increased with increasing workload during the pedaling with band loop.

Conclusions

pedaling with the band loop can be considered as an effective method to increase the Gmed, Gmed/TFL ratio and control of DKV but increasing the workload during pedaling must be done with caution.

中文翻译：

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带状环对蹬踏过程中肌肉活动和动态膝外翻的影响

背景

下肢前额线排列的改变和肌肉激活模式与下肢损伤有关。因此，为了防止受伤，许多治疗方案都集中于寻找纠正动态膝外翻（DKV）的方法。

方法

自愿参加DKV的31名休闲男性自行车手（26.4±4.5岁，176.63±7.51 cm，75.81±9.29 kg，23.20±4.15 kg / m2）自愿参加这项研究。运动分析系统和表面肌电图仪用于在四个测试条件中的每一个条件下，在踩踏2分钟的过程中收集十个周期的三维运动学和肌肉活动周期。配对的t检验用于统计学分析（p <0.05）。

结果

结果表明，在每种情况下，工作负载之间的VM（带= 0.029，无带= 0.031）和VL（带= 0.015，无带= 0.035）激活存在显着差异。Gmed激活（0.5kg = 0.001，2kg = 0.037），Gmed发作（0.5kg = 0.048，2kg = 0.012），Gmed失调（0.5kg = 0.048，2kg = 0.015），TFL激活（ 0.5kg = 0.001，2kg = 0.041）和TFL在带和无带条件之间的偏移（0.5kg = 0.078，2kg = 0.005）。在四种测试条件中的每一种之间，VM / VL比值均无显着差异（p> 0.05）。在0.5（p = 0.045）和2 kg（p = 0.001）的工作量下，乐队状态下的Gmed / TFL比明显高于没有乐队。在两种不同的工作量下踩踏板时，膝盖的外展角度受带环的影响（0.5 kg：p = 0.047，2 kg：p = 0。

结论

带环踩踏板可以被认为是增加Gmed，Gmed / TFL比和DKV控制的有效方法，但是在踩踏板时增加工作量必须谨慎。