慢性非特异性腰痛(nonspecific chronic low back pain,NSCLBP)是一种常见疾病,已经引起了广泛关注,但发病机制尚不明确。近年来,借助相关设备研究NSCLBP发生发展的生物力学机制越来越受到重视。本文以腰椎核心功能屈伸运动为重点,综述...慢性非特异性腰痛(nonspecific chronic low back pain,NSCLBP)是一种常见疾病,已经引起了广泛关注,但发病机制尚不明确。近年来,借助相关设备研究NSCLBP发生发展的生物力学机制越来越受到重视。本文以腰椎核心功能屈伸运动为重点,综述国内外关于NSCLBP腰椎屈伸生物力学特征的研究进展,通过对具体研究方法及观察指标的深入探讨及总结展望,发现患者运动学、动力学、表面肌电等参数存在异常征象,为探索NSCLBP发病机制及其科学防治开拓思路。展开更多
BACKGROUND Considering the limited effectiveness of clinical interventions for knee osteoarthritis(KOA),it is necessary to continue to explore appropriate and effective treatment strategies to improve the condition of...BACKGROUND Considering the limited effectiveness of clinical interventions for knee osteoarthritis(KOA),it is necessary to continue to explore appropriate and effective treatment strategies to improve the condition of KOA patients.AIM To clarify the influence of ankle flexion and extension exercises combined with a psychological intervention on the psychological status and activities of daily living(ADLs)of patients with KOA.METHODS The research participants were 116 KOA patients admitted to The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine between May 2019 and May 2022,including 54 patients receiving routine treatment,care and psychological intervention(control group)and 62 patients additionally treated with ankle flexion and extension exercises(research group).The two groups were comparatively analyzed in terms of psychological status(Self-rating Anxiety/Depression Scale,SDS/SAS),ADLs,knee joint function(Lysholm Knee Scoring Scale),pain(Visual Analog Scale,VAS),fatigue(Multidimensional Fatigue Inventory,MFI),and quality of life(QoL;Short-Form 36 Item Health Survey,SF-36).RESULTS After evaluation,it was found that the postinterventional SDS,SAS,VAS,and MFI scores in the research group were significantly reduced compared with the baseline(before the intervention)values and those of the control group,while the postinterventional Lysholm,ADL and SF-36 scores were markedly elevated.CONCLUSION Therefore,ankle flexion and extension exercises are highly effective in easing negative psychological status,enhancing ADLs,daily living ability,knee joint function and QoL,and relieving pain and fatigue in KOA patients,thus warranting clinical promotion.展开更多
Purpose The present study examined the effects of a reciprocal,slow velocity forearm flexion and extension task on fatigue-induced changes in isokinetic torque,agonist and antagonist muscle activation,and coactivation...Purpose The present study examined the effects of a reciprocal,slow velocity forearm flexion and extension task on fatigue-induced changes in isokinetic torque,agonist and antagonist muscle activation,and coactivation ratios at slow and moderate velocities.Methods Nine women(mean±SD:age=21.0±1.7 years;body mass=68.1±8.2 kg;height=167.4±7.2 cm)completed pre-testing for forearm flexion and extension isokinetic peak torque at 60 and 180°/s,a fatiguing task of 50 maximal,recip-rocal,isokinetic muscle actions at 60°/s,and post-testing.The amplitude(AMP)of the electromyographic(EMG)signals from the biceps and triceps were simultaneously recorded.Torque and EMG AMP were normalized to the corresponding values from the pre-testing peak torque movements.Repeated measures ANOVAs and pairwise comparisons were used to identify mean changes in torque,EMG AMP,and coactivation ratios.Results The torque analyses indicated significant decreases from pre-to post-testing for forearm flexion(14.1%±5.0%;P<0.001)and extension(25.4%±12.2%;P<0.001)at 60°.At 180°/s there was a significant decrease,collapsed across the forearm movements(24.7%±11.7%;P<0.001).For EMG AMP and coactivation ratios,there were no changes(P>0.05)from pre-to post-testing for either velocity or movement.Conclusions The torque responses were velocity-specific,with greater fatigability exhibited for forearm extension versus flexion at 60°/s,but no differences at 180°/s.The parallel EMG AMP responses between the agonist and antagonist muscles for both velocities supported the lack of fatigue-induced changes in coactivation ratios.Thus,our results demonstrated that fatigue-induced decreases in torque were not attributable to increases in antagonist activation or coactivation.展开更多
目的观察躯干前屈和后伸运动过程提放体前和体后重物时腰腹臀肌的肌电活动规律和人体运动学特征。方法 10位正常健康的男性受试者直腿站立于试验平台内提放体前后的重物,同时监测双侧腰腹臀10块肌肉的肌电活动、躯干角运动和足底力系变...目的观察躯干前屈和后伸运动过程提放体前和体后重物时腰腹臀肌的肌电活动规律和人体运动学特征。方法 10位正常健康的男性受试者直腿站立于试验平台内提放体前后的重物,同时监测双侧腰腹臀10块肌肉的肌电活动、躯干角运动和足底力系变化。分析肌电平均振幅、肌肉做功百分比和足底中心压力(center of pressure,COP)的位移,并进行常规的参数统计分析。结果重物在前时,背肌活动较强,并且负重后背肌做功百分比增大,腹肌活动减小;重物在后时,腹肌活动较强,背肌和腹肌的做功百分比接近相等,负重后腹肌的做功百分比增大,背肌活动减小;臀中肌负重后肌电活动增加,但做功百分比基本一致。结论躯干在前屈后伸的动态动作中,肌肉活动随负载大小、位置的不同而变化。前方负重时背肌主动,腹肌拮抗;后方负重时腹肌主动,背肌协同。臀中肌在动态任务中起的是稳定作用。展开更多
文摘慢性非特异性腰痛(nonspecific chronic low back pain,NSCLBP)是一种常见疾病,已经引起了广泛关注,但发病机制尚不明确。近年来,借助相关设备研究NSCLBP发生发展的生物力学机制越来越受到重视。本文以腰椎核心功能屈伸运动为重点,综述国内外关于NSCLBP腰椎屈伸生物力学特征的研究进展,通过对具体研究方法及观察指标的深入探讨及总结展望,发现患者运动学、动力学、表面肌电等参数存在异常征象,为探索NSCLBP发病机制及其科学防治开拓思路。
文摘BACKGROUND Considering the limited effectiveness of clinical interventions for knee osteoarthritis(KOA),it is necessary to continue to explore appropriate and effective treatment strategies to improve the condition of KOA patients.AIM To clarify the influence of ankle flexion and extension exercises combined with a psychological intervention on the psychological status and activities of daily living(ADLs)of patients with KOA.METHODS The research participants were 116 KOA patients admitted to The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine between May 2019 and May 2022,including 54 patients receiving routine treatment,care and psychological intervention(control group)and 62 patients additionally treated with ankle flexion and extension exercises(research group).The two groups were comparatively analyzed in terms of psychological status(Self-rating Anxiety/Depression Scale,SDS/SAS),ADLs,knee joint function(Lysholm Knee Scoring Scale),pain(Visual Analog Scale,VAS),fatigue(Multidimensional Fatigue Inventory,MFI),and quality of life(QoL;Short-Form 36 Item Health Survey,SF-36).RESULTS After evaluation,it was found that the postinterventional SDS,SAS,VAS,and MFI scores in the research group were significantly reduced compared with the baseline(before the intervention)values and those of the control group,while the postinterventional Lysholm,ADL and SF-36 scores were markedly elevated.CONCLUSION Therefore,ankle flexion and extension exercises are highly effective in easing negative psychological status,enhancing ADLs,daily living ability,knee joint function and QoL,and relieving pain and fatigue in KOA patients,thus warranting clinical promotion.
文摘Purpose The present study examined the effects of a reciprocal,slow velocity forearm flexion and extension task on fatigue-induced changes in isokinetic torque,agonist and antagonist muscle activation,and coactivation ratios at slow and moderate velocities.Methods Nine women(mean±SD:age=21.0±1.7 years;body mass=68.1±8.2 kg;height=167.4±7.2 cm)completed pre-testing for forearm flexion and extension isokinetic peak torque at 60 and 180°/s,a fatiguing task of 50 maximal,recip-rocal,isokinetic muscle actions at 60°/s,and post-testing.The amplitude(AMP)of the electromyographic(EMG)signals from the biceps and triceps were simultaneously recorded.Torque and EMG AMP were normalized to the corresponding values from the pre-testing peak torque movements.Repeated measures ANOVAs and pairwise comparisons were used to identify mean changes in torque,EMG AMP,and coactivation ratios.Results The torque analyses indicated significant decreases from pre-to post-testing for forearm flexion(14.1%±5.0%;P<0.001)and extension(25.4%±12.2%;P<0.001)at 60°.At 180°/s there was a significant decrease,collapsed across the forearm movements(24.7%±11.7%;P<0.001).For EMG AMP and coactivation ratios,there were no changes(P>0.05)from pre-to post-testing for either velocity or movement.Conclusions The torque responses were velocity-specific,with greater fatigability exhibited for forearm extension versus flexion at 60°/s,but no differences at 180°/s.The parallel EMG AMP responses between the agonist and antagonist muscles for both velocities supported the lack of fatigue-induced changes in coactivation ratios.Thus,our results demonstrated that fatigue-induced decreases in torque were not attributable to increases in antagonist activation or coactivation.
文摘目的观察躯干前屈和后伸运动过程提放体前和体后重物时腰腹臀肌的肌电活动规律和人体运动学特征。方法 10位正常健康的男性受试者直腿站立于试验平台内提放体前后的重物,同时监测双侧腰腹臀10块肌肉的肌电活动、躯干角运动和足底力系变化。分析肌电平均振幅、肌肉做功百分比和足底中心压力(center of pressure,COP)的位移,并进行常规的参数统计分析。结果重物在前时,背肌活动较强,并且负重后背肌做功百分比增大,腹肌活动减小;重物在后时,腹肌活动较强,背肌和腹肌的做功百分比接近相等,负重后腹肌的做功百分比增大,背肌活动减小;臀中肌负重后肌电活动增加,但做功百分比基本一致。结论躯干在前屈后伸的动态动作中,肌肉活动随负载大小、位置的不同而变化。前方负重时背肌主动,腹肌拮抗;后方负重时腹肌主动,背肌协同。臀中肌在动态任务中起的是稳定作用。
