Effect of Short-Term Whole-Body Vibration Training on Metabolic Risk Factors, Inflammatory Markers, and Arterial Stiffness

To investigate the effect of aerobic exercise combined with whole-body vibration (WBV) training on metabolic syndrome risk, and inflammatory markers, and to compare its effects on arterial stiffness and several blood parameters related to metabolic syndrome with those of aerobic training alone. Thirty healthy participants were divided into 2 groups matched for age and body mass index (BMI). Fifteen subjects were assigned to the WBV group (WBV + aerobic training) and the other 15 to the control group (aerobic training only). All participants performed a treadmill exercise 3 days/week for 4 weeks, for 50 min after 30 min rest period. Exercise was performed at a heart rate (HR) corresponding to 60% of the HR at each individual’s maximum oxygen uptake (VO2max). Body weight and BMI after training were significantly lower than those before training in the WBV group (P < 0.01). Concerning arterial stiffness, the pulse-wave velocity after training was significantly lower than that before training in the WBV group (1048.7 ± 105.6 vs. 1008.4 ± 101.1 cm/s, P < 0.05). Meanwhile, the VO2max after training was significantly higher than that before training in the WBV group (47.7 ± 12.8 vs. 51.4 ± 14.1 mL·min-1·kg-1, P < 0.01). However, no significant differences were observed in any parameters before and after training in the control group. Our results suggest that aerobic exercise combined with WBV training may be effective in reducing arterial stiffness and improving cardiorespiratory fitness than aerobic training alone.

Noise and vibration measurements in a Viking military vehicle

Noise and whole-body vibration measurements were made in a Viking military vehicle to determine the variation that should be expected during repeat measures,the effect of speed(up to 60 km/h in 5 km/h increments),and during travel over different types of terrain(comprising concrete road,gravel track and rough cross-country).Measurements were made at various crew positions(including the driver and commander)in both the front and the rear cabs in the vehicles.Three translational axes of vibration were measured in each seat.Two speeds were investigated over road(35 km/h and 55e60 km/h)and gravel(20 km/h and 35 km/h)surfaces.The effect of varying speed of the vehicle on the measured noise and vibration magnitudes was also investigated.The highest sound pressure level(LAeq)of 104 dB(A)was measured at the commander’s standing position during travel over concrete road at 55 km/h.Higher noise levels occurred for a standing commander compared with when sitting on the seat.A maximum single axis frequency-weighted vibration magnitude of 1.0 m/s^(2) r.m.s.was measured on the driver’s seat during travel over track at 35 km/h.Higher vibration magnitudes occurred during travel over track compared with travel over road.Both noise and vibration exposure of crew within the Viking vehicle increased with increasing speed of the vehicle.

Combined Effects of Exposure to Noise and Vibration on Human Postural Equilibrium under Simulated Driving Conditions

There is little information about drivers’body balance responses to combined exposure of noise and vibration.To fill the gap,this study aims to investigate the combined effects of exposure to noise and whole-body vibration(WBV)on the body balance under simulated driving conditions.For this purpose,30 male participants were exposed to noise level at 85 dB(A)and two vibration levels(0.87 and 1.3 m/s^(2))in five sessions.The design of the study was repeated-measures,and it attempted to assess the effects of 40 minutes of exposure to noise and/or WBV.Moreover,the participants’fatigue was measured with the Borg scale(CR 10).The findings revealed there was a significant change in body sway after WBV and combined noise and WBV exposure(p<0.05).However,no significant difference was found in exposure to noise alone(p>0.05).The effect sizes of exposure to noise,WBV(1.3 m/s^(2)),and combined noise and WBV(1.3 m/s^(2))on body balance were 0.035,0.425,and 0.635,respectively.Also,single exposure to WBV caused more fatigue than single exposure to noise(p<0.05).Combined noise and WBV exposure descriptively caused more fatigue in comparison with the influence of WBV alone.The study concluded that the combined effects of exposure to noise and vibration are more than the sum of them.So,some synergistic effects may be observed in human body balance.It is essential to increase drivers’awareness and revise current health care interventions about new possible effects of combined exposures.

Whole Body Vibration:The Effect of Position and Frequency on Perceived Exertion in Healthy,Active Adults

Whole Body Vibration(WBV)is a new exercise trend in fitness and performance enhancement.WBV platforms oscillate over a range of frequencies and amplitudes;however no study to date has examined the experience of perceived exertion with differences in vibration frequency and static or dynamic body position,nor examined the difference between sexes based on position and frequency during WBV.The purpose of this study was to assess the effects of position and frequency on perceived exertion during WBV in healthy,active adults.A convenience sample of 39 healthy young adults who participated in moderated exercise was blinded and randomly allocated to six WBV conditions composed of different frequency and position combinations.The participants received instruction,provided informed consent,participated in a warm-up session,and then reported rating of perceived exertion for each WBV condition.A 2×3 within-subjects multivariate approach ANOVA was conducted against an alpha of 0.05.A statistically significant main effect of position(p=0.004)and significant main effect of frequency(p=0.025)were found.Significant marginal means were found between the frequencies of 0 Hz and 50 Hz(p=0.007).Statistically significant differences were found between sexes for all combinations.

从第65届美国运动医学年会看全身震动对健康促进研究的影响

依据2018年第65届美国运动学会(ACSM)学术年会、第9届"Exercise is Medicine(EIM)"世界大会内容,查阅相关文献资料,以EIM为基础,重点阐述2018年ACSM年会中5篇全身震动(WBV)交流论文及与其相关的WBV干预的研究现状。这些研究前沿和研究现状对进一步开展WBV健身效果的研究带来新启示和思路。研究认为,WBV能改善老年人姿势平衡、降低跌倒风险、增加身体功能和体成分、增进心血管系统和骨关节炎的神经肌肉表现等。WBV对健康促进效果显著。同时,也应该注意到,长期WBV干预对心血管系统健康和神经肌肉系统改善的影响仍不清楚,WBV干预与膝关节屈膝不同角度干预的积极效果间的相关性应进一步综合评定。需要深入开展涵盖下肢肌力、身体功能和体成分、姿势平衡和膝关节屈膝不同程度在内的系统的WBV评估体系构建,藉此使WBV健身手段获得正确评估,为WBV广泛开展提供更多科学依据。

Multi-mechanical waves against Alzheimer’s disease pathology:a systematic review

Alzheimer’s disease(AD)is the most common cause of dementia,afecting approximately 40 million people worldwide.The inefectiveness of the available pharmacological treatments against AD has fostered researchers to focus on alternative strategies to overcome this challenge.Mechanical vibrations delivered in diferent stimulation modes have been associated with marked improvements in cognitive and physical performance in both demented and nondemented elderly.Some of the mechanical-based stimulation modalities in eforts are earlier whole-body vibration,transcranial ultrasound stimulation with microbubble injection,and more recently,auditory stimulation.However,there is a huge variety of treatment specifcations,and in many cases,conficting results are reported.In this review,a search on Scopus,PubMed,and Web of Science databases was performed,resulting in 37 papers.These studies suggest that mechanical vibrations delivered through diferent stimulation modes are efective in attenuating many parameters of AD pathology including functional connectivity and neuronal circuit integrity defcits in the brains of AD patients,as well as in subjects with cognitive decline and non-demented older adults.Despite the evolving preclinical and clinical evidence on these therapeutic modalities,their translation into clinical practice is not consolidated yet.Thus,this comprehensive and critical systematic review aims to address the most important gaps in the reviewed protocols and propose optimal regimens for future clinical application.

影响公交司机健康因素的探讨——全身振动对人体危害的研究

本文调查了317名公交司机和336名银行财会人员的病史和自觉症(?),发现司机患痔率明显升高,同时有耳鸣、失眠、心悸、手麻、恶心、上腹痛、胃酸过多、食欲不振、下背痛、上肢痛等症状。对37名司机和43名财会人员作抽样检查,发现司机患腰椎唇样增生显著,脊柱生理弧度消失,视野缩小,听力下降,肾下垂,运动神经传导速度减慢,甲皱微循环形态消失,尿中HVA含量降低等。我们认为,这些变化系由接触全身振动所致。