背景和目的:卧床患者是静脉血栓栓塞症(VTE)的高危人群。弹性压缩长袜和间歇性气动压缩等被动装置很常见。腿部锻炼设备(LEX)是一种主动设备,旨在通过有效地收缩比目鱼肌肌肉来防止VTE,因此有望有效地防止下肢的废用。然而,很少对LEX的运动学特性进行研究。因此,这项研究旨在比较LEX与测力计的运动特性,通常用作下肢锻炼装置,并检查其对肌肉活动和循环动力学两个领域的影响。材料和方法:本研究使用交叉设计,其中每个参与者都进行了两种练习,以评估每种设备的运动特征。15名健康成年人用LEX和测力计(TerasuErugo,SDGCo.,Ltd.,东京,日本)每次5分钟,每次运动后休息10分钟。使用表面肌电图测量肌肉活动(临床DTS,Noraxon,斯科茨代尔,AZ,美国),和循环动力学使用非侵入性阻抗心输出量计(PhysioflowEnduro,Manatec生物医学,巴黎,法国)。主要结果是运动期间比目鱼肌最大自愿收缩的平均百分比(%MVC)。结果:LEX组比目鱼肌的平均%MVC显著高于对照组,而在不同的时期和序列中没有观察到显著差异。心率,每搏输出量,和心输出量在运动期间增加,此后减少;然而,装置之间的差异不显著.结论:LEX不仅可能具有较高的血栓预防作用,而且作为下肢锻炼设备,对预防肌肉萎缩也有更高的效果。此外,LEX可以安全地用于需要监测循环动力学变化的患者。
Background and Objectives: Bedridden patients are at a high risk of venous thromboembolism (VTE). Passive devices such as elastic compression stockings and intermittent pneumatic compression are common. Leg exercise apparatus (LEX) is an active device designed to prevent VTE by effectively contracting the soleus muscle and is therefore expected to be effective in preventing disuse of the lower limbs. However, few studies have been conducted on the kinematic properties of LEX. Therefore, this study aimed to compare the exercise characteristics of LEX with those of an ergometer, which is commonly used as a lower-limb exercise device, and examine its effect on the two domains of muscle activity and circulatory dynamics. Materials and Methods: This study used a crossover design in which each participant performed both exercises to evaluate the exercise characteristics of each device. Fifteen healthy adults performed exercises with LEX and an ergometer (Terasu Erugo, SDG Co., Ltd., Tokyo, Japan) for 5 min each and rested for 10 min after each exercise. Muscle activity was measured using surface electromyography (Clinical DTS, Noraxon, Scottsdale, AZ, USA), and circulatory dynamics were recorded using a non-invasive impedance cardiac output meter (Physioflow Enduro, Manatec Biomedical, Paris, France). The primary outcome was the mean percentage of maximum voluntary contraction (%MVC) of the soleus muscle during exercise. Results: The mean %MVC of the soleus muscle was significantly higher in the LEX group, whereas no significant differences were observed across the periods and sequences. Heart rate, stroke volume, and cardiac output increased during exercise and decreased thereafter; however, the differences between the devices were not significant. Conclusions: LEX may not only have a higher thromboprophylaxis effect, but also a higher effect on preventing muscle atrophy as a lower-extremity exercise device. Additionally, LEX could potentially be used safely in patients who need to be monitored for changes in circulatory dynamics.