康复科研博士团：运动康复SCI论文导读2023-10（二）

3.《Journal of Sport and Health Science》

JCR：Q1；IF：11.7

Sports compression garments improve resting markers of venous return and 

muscle blood flow in male basketball players

运动加压服装改善了男子篮球运动员静息状态下静脉回流和肌肉血流量的指标

【Abstract】

Background: The benefits associated with sports compression garments are thought to be closely related to enhanced blood flow. However, findings are equivocal, possibly due to heterogeneity in the techniques used for measuring blood flow, the garment types used, and the pressures applied. This study combined Doppler ultrasound and near-infrared spectroscopy technologies to provide the first comprehensive assessment of the effects of 3 sports compression garment types on markers of venous return and muscle blood flow at rest.

Methods：Resting lower-limb blood flow measures (markers of venous return, muscle blood flow, and muscle oxygenation) of 22 elite, junior, male basketball players (age = 17.2 ± 0.9 years, mean ± SD) were assessed in 4 separate conditions: no compression (CON), compression tights (TIGHTS), compression shorts (SHORTS), and compression socks (SOCKS). Markers of venous return (cross-sectional area, time-averaged mean and peak blood flow velocity, and venous blood flow) were measured via Doppler ultrasound at the popliteal and common femoral veins. Muscle blood flow and muscle oxygenation were measured in the gastrocnemius medialis and vastus lateralis using near-infrared spectroscopy.

Results：Popliteal markers of venous return were higher in TIGHTS compared to CON (p < 0.01) and SHORTS (p < 0.01), with SOCKS values higher compared with CON (p < 0.05). Common femoral vein markers of venous return were higher for all conditions compared to CON (p < 0.05), with TIGHTS values also higher compared to SOCKS (p < 0.05). Gastrocnemius medialis blood flow was higher for TIGHTS compared to CON (p = 0.000), SOCKS (p = 0.012), and SHORTS (p = 0.000), with SOCKS higher compared to SHORTS (p = 0.046). Vastus lateralis blood flow was higher for TIGHTS compared to CON (p = 0.028) and SOCKS (p = 0.019), with SHORTS also higher compared to CON (p = 0.012) and SOCKS (p = 0.005). Gastrocnemius medialis oxygenation was higher for TIGHTS compared to CON (p = 0.003), SOCKS (p = 0.033), and SHORTS (p = 0.003), with SOCKS higher compared to CON (p = 0.044) and SHORTS (p = 0.032). Vastus lateralis oxygenation was higher for TIGHTS compared to CON (p = 0.020) and SOCKS (p = 0.006).

Conclusion：Markers of venous return, muscle blood flow, and muscle oxygenation are increased with sports compression garments. TIGHTS are most effective, potentially because of the larger body area compressed.

【摘要】  

背景：运动压缩服装的好处被认为与增强血液流动密切相关。然而，结果是模棱两可的，可能是由于用于测量血流的技术、使用的服装类型和施加的压力不同所致。这项研究结合了多普勒超声和近红外光谱技术，首次全面评估了三种类型的运动压缩服对静息状态下静脉回流和肌肉血流量的影响。

方法：对22名优秀、少年、男子篮球运动员(年龄17.2±0.9岁，平均±SD)进行静息状态下的静脉回流、肌肉血流量、肌肉氧合等指标的测定，分别在4种不同的状态下进行测试：不受压(CON)、紧身裤(THZ)、紧身裤(TH2O)、紧身袜(SOCKS)。用多普勒超声测量静脉回流的指标(横截面积、平均血流速度、峰值血流速度、静脉血流量)。用近红外光谱仪测量腓肠肌内侧肌和股外侧肌的肌肉血流量和肌肉氧合。

结果：紧身裤的静脉回流指标显著高于对照组(p<0.01)和短裤(p<0.01)，袜子的数值高于对照组(p<0.05)。在所有情况下，静脉回流的常见股静脉标志物均高于对照组(p<0.05)，紧身值也高于袜子(p<0.05)。紧身裤的腓肠肌内侧血流量高于紧身裤(p = 0.000)、袜子(p = 0.012)和短裤(p = 0.000)，袜子比短裤高(p = 0.046)。紧身裤的股外侧肌血流量高于CON(p = 0.028)和袜子(p = 0.019)，短裤也高于CON(p = 0.012)和袜子(p = 0.005)。与CON(p = 0.003)、袜子(p = 0.033)和短裤(p = 0.003)相比，紧身裤的腓肠肌内侧肌氧合力更高，而袜子比CON(p = 0.044)和短裤(p = 0.032)更高。紧身裤的股外侧肌氧合率高于紧身裤(p = 0.02)和袜子(p = 0.006)。

结论：运动压缩服装增加了静脉回流、肌肉血流量和肌肉氧合的指标。紧身衣最有效，可能是因为压缩了较大的身体面积。

4.《BioMed Central 》

JCR：Q1；IF：10.66

Motor control differs for increasing and decreasing force production during ankle Isometric exercises in children

在儿童踝关节等距运动中，运动控制的增加和减少力的产生有所不同

【Abstract】

Background：Performance of the central nervous system (CNS) in increased and decreasing muscle force around the ankle joint is essential for upright tasks of daily living. Previous studies have shown altered CNS control when they decrease force compared with when they increase force in young and older adults. But whether such alteration exists during childhood with incomplete maturation of CNS systems remain unclear. Therefore, this study aimed to evaluate the disparities in intramuscular EMG-EMG coherence, which serve as indicators of corticospinal drive to muscles during ankle isometric increasing and decreasing force generation in children.

Methods：We measured intramuscular EMG-EMG coherence activity of the tibialis anterior (TA) and the associated ability to perform isometric efforts at the ankle in 12 typically developing children (mean ± SD age = 5.91±1.37 years) and 12 healthy young adults (mean ± SD age = 23.16±1.52 years). The participants maintained isometric contractions at 20% of their maximal voluntary contractions (MVC) during ankle dorsiflexion to match a triangle trajectory for 7 s, including ramping up in 3.5 s (increasing force phase) and then linearly ramping down to rest in 3.5 s (decreasing force phase). The variability of force control was characterized by the coefficient of variance (CoV) of force output. Intramuscular EMG-EMG coherence from TA in two frequency bands, the beta band (15–30 Hz) and gamma band (30–45) that could reflect the corticospinal drive, were calculated for the comparison. A repeated measures ANOVA with the within-subjects factor of force generation phase (increasing force vs. decreasing force)x between-subjects factor of the group (children and young adults) was used for statistical analysis.

Results：Regarding the within-subjects difference, our results exhibited significantly higher CoV of force (p < 0.01) and lower EMG-EMG coherence of TA when they decrease force compared with when they increase force in both children and young adult groups. Regarding the between-subjects difference, the CoV of force was significantly higher (p < 0.01) in children compared to young adults, while the EMG-EMG coherence in children showed a significantly lower (p < 0.01) coherence compared with young adults. Furthermore, the EMG-EMG coherence measures were negatively correlated with the CoV of force.

Conclusions：The findings suggest that the age-related development would increase the corticospinal drive to TA muscle to deal with ankle isometric dorsiflexion during childhood, which could be also modulated with the force production phases, including increasing and decreasing force.

【摘要】  

背景：中枢神经系统（CNS）在踝关节周围肌肉力的增加和减少方面的表现对日常生活中的直立任务至关重要。先前的研究表明，在年轻人和老年人中，与增加力量相比，中枢神经系统控制发生了改变。但这种改变是否存在于儿童时期，中枢神经系统不完全成熟尚不清楚。因此，本研究旨在评估儿童肌内肌电-肌电相干性的差异，作为踝关节等距增加和减少力产生时皮质脊髓驱动肌肉的指标。

方法：我们测量了12名典型发育儿童（平均± SD年龄= 5.91±1.37岁）和12名（平均± SD年龄= 23.16±1.52年）健康年轻人的肌内肌电图相干活动和执行踝关节等距努力的相关能力。在踝关节背屈期间，参与者保持其最大自主收缩（MVC）的20%，以匹配三角形轨迹7秒，包括在3.5秒内上升（增加力阶段），然后在3.5秒内线性下降到休息（减少力阶段）。力控制的变异性以力输出的方差系数（CoV）为特征。计算TA在两个频段的贝塔波段（15-30 Hz）和伽马波段（30-45）的肌内肌电图相干性，以进行比较。重复测量方差分析的力产生阶段（增加力与减少力量）x组（儿童和年轻人）进行统计分析。

结果：关于主体内差异，我们的结果显示显著增加力的CoV（p<0.01）和TA的肌电一致性。在受试者间的差异方面，儿童的力的CoV显著高于年轻人（p < 0.01），而儿童的肌电-肌电一致性显著低于年轻人（p < 0.01）。此外，EMG-EMG一致性测量与CoV相关.

结论：研究结果表明，年龄相关的发展会增加皮质脊髓驱动TA肌肉处理脚踝等距背屈在童年，也可以调节力量生产阶段，包括增加和减少力.

Running with whole-body electromyostimulation improves physiological determinants of endurance performance --arandomized control trial

全身肌电刺激跑步可以改善耐力表现的生理决定因素——这是一项随机对照试验

【Abstract】

Background：This study aimed to evaluate the physiological and metabolic adaptations to an eight-week running intervention with whole-body electromyostimulation (wbEMS) compared to running without wbEMS.

Methods：The review was conducted in accordance with the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines, and the systematic search of literature was conducted up to January 1st, 2023. Studies that directly compared free-weight vs. machine-based strength training for a minimum of 6 weeks in adults (18–60 yrs.) were included.

In a randomized controlled trial (RCT), 59 healthy participants (32 female/ 27 male, 41 ± 7 years, rel.V̇O2max 40.2 ± 7.4 ml/min/kg) ran twice weekly à 20 min for eight weeks either with a wbEMS suit (EG) or without wbEMS (control group, CG). Before and after the intervention, (i) rel.V̇O2max, heart rate and time to exhaustion were recorded with an incremental step test with an incremental rate of 1.20 km/h every 3 min. They were interpreted at aerobic and (indirect) anaerobic lactate thresholds as well as at maximum performance. (ii) Resting metabolic rate (RQ) as well as (iii) body composition (%fat) were assessed.

Results：Following the intervention, V̇O2max was significantly enhanced for both groups (EG ∆13 ± 3%, CG ∆9 ± 3%). Velocity was elevated at lactate thresholds and maximum running speed (EG ∆3 ± 1%, CG ∆2 ± 1%); HRmax was slightly reduced by -1 beat/min. No significant changes were observed for time until exhaustion and lactate. RQ was significantly enhanced following both trainings by + 7%. %fat was reduced for both groups (EG ∆-11 ± 3%, CG ∆-16 ± 5%), without any changes in body mass. Results did not differ significantly between groups.

Conclusion：Both interventions had a positive impact on aerobic power. The rightward shift of the time-velocity graph points towards improved endurance performance. The effects of wbEMS are comparable to those after high-intensity training and might offer a time-efficient alternative to affect physiological and metabolic effects.

【摘要】  

背景：本研究旨在评估生理和代谢适应八周运行干预全身肌电刺激（wbEMS）相比运行没有wbEMS.

方法：在随机对照试验（RCT），59名健康参与者(32女性/27男性，41 ± 7年，代表。VO2max 40.2 ± 7.4 ml/min/kg)每周运行两次，每次20 min，连续8周，或使用wbEMS套装（EG）或不使用wbEMS（对照组，CG）。在干预前后，(i) rel。采用增量步进试验记录最大vo2、心率和耗竭时间，每3 min的增量速率为1.20 km/h。它们被解释为有氧和（间接）厌氧乳酸阈值以及在最大性能。（ii）评估静息代谢率（RQ）和（iii）体成分（%脂肪）。

结果：干预后，两组患者的VO2max均显著提高（EG∆13±3%，CG∆9±3%）。在乳酸阈值和最大运行速度（EG∆3±1%，CG∆2±1%）时，速度升高；HRmax略微降低-1拍/分钟。在衰竭和乳酸盐之前的一段时间内没有观察到明显的变化。采用+进行两次训练后，RQ均显著提高7%。两组患者的脂肪含量均降低了1%（EG∆-11±3%，CG∆-16±5%），但体重没有任何变化。结果在两组间无显著性差异。

结论：两种干预措施对有氧力量均有积极的影响。时速图的右移指向提高耐力性能。wbEMS的效果与高强度训练后的效果相当，可能提供一种时间高效的替代方法来影响生理和代谢效应。