Background:Technological advancements in modern military and acrobatic jet planes have resulted in extraordinary psychophysiological loads being exerted upon flying personnel,including inducing neck and back pain.The ...Background:Technological advancements in modern military and acrobatic jet planes have resulted in extraordinary psychophysiological loads being exerted upon flying personnel,including inducing neck and back pain.The purpose of this study was to examine the effects of 12 weeks of functional strength training on 1)the volume and strength of the neck and shoulder muscles and 2)muscular activity upon exposure to helmets of different masses and elevated Gz forces in a long-arm centrifuge in high-performance aircraft personnel.Methods:Eighteen participants underwent 12 weeks of functional strength training(n=12)or the control protocol(n=6)without additional strength training.Pre-and post-intervention tests included evaluations of isometric strength of the head extensor muscles,flexion,and lateral flexion and rotation,as well as magnetic resonance imaging(MRI)to measure the volume of the m.sternocleidomastoideus,m.trapezius,and deep neck muscles.Furthermore,during a long-arm centrifuge(+1.4 and+3Gz)protocol,the muscular activity levels of the m.sternocleidomastoideus,m.trapezius and m.erector spinae muscles were assessed without a flight helmet,with a helmet,and with a helmet and night vision goggles.Each participant’s perception of muscular strain was noted immediately after the long-arm centrifuge protocol.Results:The maximal isometric strength in all exercises and muscle volumes increased in the training group but not the control group(P<0.05).Relative muscle activity(%MVC)with a helmet decreased after the intervention in the training but not the control group(P=0.01).Relative muscle activity while wearing a helmet and night vision goggles was higher after intervention in the control group than in the training group(P<0.01).The perceived muscular strain of the neck muscles induced by the long-arm centrifuge did not differ between the groups.Conclusions:Twelve weeks of functional strength training improves the maximal isometric strength and volume of neck and shoulder muscles and leads to lower relative muscle activation upon exposure to elevated Gz forces in a long-arm centrifuge.展开更多
We adopted auricular pressure therapy to treat 32 cases with strain of rhomboidmuscle and achieved satisfactory results,namely,the cure rate was 46.87％,improved rate 40.67％,and the total effective rate 87.54％.
Background Work-related musculoskeletal disorders （WMSDs） have high prevalence in sewing machine operators employed in the garment industry. Long work duration, sustained low level work and precise hand work are the...Background Work-related musculoskeletal disorders （WMSDs） have high prevalence in sewing machine operators employed in the garment industry. Long work duration, sustained low level work and precise hand work are the main risk factors of neck-shoulder disorders for sewing machine operators. Surface electromyogram （sEMG） offers a valuable tool to determine muscle activity （internal exposure） and quantify muscular load （external exposure）. During sustained and/or repetitive muscle contractions, typical changes of muscle fatigue in sEMG, as an increase in amplitude or a decrease as a shift in spectrum towards lower frequencies, can be observed. In this paper, we measured and quantified the muscle load and muscular activity patterns of neck-shoulder muscles in female sewing machine operators during sustained sewing machine operating tasks using sEMG. Methods A total of 18 healthy women sewing machine operators volunteered to participate in this study. Before their daily sewing machine operating task, we measured the maximal voluntary contractions （MVC） and 20%MVC of bilateral cervical erector spinae （CES） and upper trapezius （UT） respectively, then the sEMG signals of bilateral UT and CES were monitored and recorded continuously during 200 minutes of sustained sewing machine operating simultaneously which equals to 20 time windows with 10 minutes as one time window. After 200 minutes＇ work, we retest 20%MVC of four neck-shoulder muscles and recorded the sEMG signals. Linear analysis, including amplitude probability distribution frequency （APDF）, amplitude analysis parameters such as roof mean square （RMS） and spectrum analysis parameter as median frequency （MF）, were used to calculate and indicate muscle load and muscular activity of bilateral CES and UT. Results During 200 minutes of sewing machine operating, the median load for the left cervical erector spinae （LCES）, right cervical erector spinae （RCES）, left upper trapezius （LUT） and right upper trapezius （RUT） were 6.78%MVE, 6.94%MVE, 6.47%MVE and 5.68%MVE, respectively. Work load of right muscles are significantly higher than that of the left muscles （P〈0.05）; sEMG signal analysis of isometric contractions indicated that the amplitude value before operating was significantly higher than that of after work （P 〈0.01）, and the spectrum value of bilateral CES and UT were significantly lower than those of after work （P 〈0.01）; according to the sEMG signal data of 20 time windows, with operating time pass by, the muscle activity patterns of bilateral CES and UT showed dynamic changes, the maximal amplitude of LCES, RCES, LUT occurred at the 20th time window, RUT at 16th time window, spectrum analysis showed that the lower value happened at 7th, 16th, 20th time windows. Conclusions Female sewing machine operators were exposed to high sustained static load on bilateral neck-shoulder muscles; left neck and shoulder muscles were held in more static positions; the 7th, 16th, and 20th time windows were muscle fatiQue period that erQonomics intervention can protocol at these periods.展开更多
Traditional Chinese medicine scraping is a kind of natural therapy with a long history of simple and safe operation.It is easy to learn and tools are readily available,so that it has a very wide range of practical val...Traditional Chinese medicine scraping is a kind of natural therapy with a long history of simple and safe operation.It is easy to learn and tools are readily available,so that it has a very wide range of practical value.This paper introduces the definition and indications,function and standardization process of scraping technology,the technical operation specifications and matters needing attentions,as well as the application method of scraping technology,with a view to providing reference for clinical use of scraping technology in the treatment of cervical spondylosis,periarthritis of shoulder,lumbar muscle strain,hypertension,chloasma,and other diseases.展开更多
This article introduces the function and manipulations of acupoint Chengshan(BL57) and presents six proven cases of stiff neck,acute lumbar muscle sprain,hemorrhoids,dysmenorrheal,shoulder periarthritis and gastrocnem...This article introduces the function and manipulations of acupoint Chengshan(BL57) and presents six proven cases of stiff neck,acute lumbar muscle sprain,hemorrhoids,dysmenorrheal,shoulder periarthritis and gastrocnemius strain,so as to claim that point Chengshan(BL57) has a wide function and can be used effectively and safely.展开更多
目的探讨电针关键肌结合“颈—肩—胸”调整术对颈型颈椎病伴上交叉综合征患者的临床效果。方法选取颈型颈椎病伴上交叉综合征患者70例,采用随机数字表法分为对照组和观察组,每组35例,对照组采用电针关键肌治疗,观察组在电针关键肌的基...目的探讨电针关键肌结合“颈—肩—胸”调整术对颈型颈椎病伴上交叉综合征患者的临床效果。方法选取颈型颈椎病伴上交叉综合征患者70例,采用随机数字表法分为对照组和观察组,每组35例,对照组采用电针关键肌治疗,观察组在电针关键肌的基础上采用基于“筋骨并举”思想的“颈—肩—胸”调整术治疗。治疗前后分别运用中文版颈部疼痛和废用量表(Chinese version of neck pain and disability scale,SC-NPDS)对患者颈椎疼痛水平、功能、残疾及情绪和认知进行评分,测量治疗前后颈椎活动度的改变以及前肩角度(forward shoulder angle,FSA)、头前伸角度(forward head angle,FHA)的变化。结果与治疗前比较,两组治疗后SC-NPDS评分、FSA、FHA显著降低(P<0.05),颈椎左旋、右旋、左右侧屈、屈曲、伸展活动度显著升高(P<0.05);两组患者治疗前后SC-NPDS评分、颈椎活动度及FSA、FHA差值比较,差异均有统计学意义(P<0.05)。结论电针关键肌治疗颈型颈椎病伴上交叉综合征能减轻患者疼痛,改善颈椎大部分活动度及前倾姿势,而在此基础上采用“颈—肩—胸”调整术更能有效减轻患者疼痛,改善颈椎活动度,纠正患者静态头颈部前倾姿势。展开更多
文摘Background:Technological advancements in modern military and acrobatic jet planes have resulted in extraordinary psychophysiological loads being exerted upon flying personnel,including inducing neck and back pain.The purpose of this study was to examine the effects of 12 weeks of functional strength training on 1)the volume and strength of the neck and shoulder muscles and 2)muscular activity upon exposure to helmets of different masses and elevated Gz forces in a long-arm centrifuge in high-performance aircraft personnel.Methods:Eighteen participants underwent 12 weeks of functional strength training(n=12)or the control protocol(n=6)without additional strength training.Pre-and post-intervention tests included evaluations of isometric strength of the head extensor muscles,flexion,and lateral flexion and rotation,as well as magnetic resonance imaging(MRI)to measure the volume of the m.sternocleidomastoideus,m.trapezius,and deep neck muscles.Furthermore,during a long-arm centrifuge(+1.4 and+3Gz)protocol,the muscular activity levels of the m.sternocleidomastoideus,m.trapezius and m.erector spinae muscles were assessed without a flight helmet,with a helmet,and with a helmet and night vision goggles.Each participant’s perception of muscular strain was noted immediately after the long-arm centrifuge protocol.Results:The maximal isometric strength in all exercises and muscle volumes increased in the training group but not the control group(P<0.05).Relative muscle activity(%MVC)with a helmet decreased after the intervention in the training but not the control group(P=0.01).Relative muscle activity while wearing a helmet and night vision goggles was higher after intervention in the control group than in the training group(P<0.01).The perceived muscular strain of the neck muscles induced by the long-arm centrifuge did not differ between the groups.Conclusions:Twelve weeks of functional strength training improves the maximal isometric strength and volume of neck and shoulder muscles and leads to lower relative muscle activation upon exposure to elevated Gz forces in a long-arm centrifuge.
文摘We adopted auricular pressure therapy to treat 32 cases with strain of rhomboidmuscle and achieved satisfactory results,namely,the cure rate was 46.87％,improved rate 40.67％,and the total effective rate 87.54％.
文摘Background Work-related musculoskeletal disorders （WMSDs） have high prevalence in sewing machine operators employed in the garment industry. Long work duration, sustained low level work and precise hand work are the main risk factors of neck-shoulder disorders for sewing machine operators. Surface electromyogram （sEMG） offers a valuable tool to determine muscle activity （internal exposure） and quantify muscular load （external exposure）. During sustained and/or repetitive muscle contractions, typical changes of muscle fatigue in sEMG, as an increase in amplitude or a decrease as a shift in spectrum towards lower frequencies, can be observed. In this paper, we measured and quantified the muscle load and muscular activity patterns of neck-shoulder muscles in female sewing machine operators during sustained sewing machine operating tasks using sEMG. Methods A total of 18 healthy women sewing machine operators volunteered to participate in this study. Before their daily sewing machine operating task, we measured the maximal voluntary contractions （MVC） and 20%MVC of bilateral cervical erector spinae （CES） and upper trapezius （UT） respectively, then the sEMG signals of bilateral UT and CES were monitored and recorded continuously during 200 minutes of sustained sewing machine operating simultaneously which equals to 20 time windows with 10 minutes as one time window. After 200 minutes＇ work, we retest 20%MVC of four neck-shoulder muscles and recorded the sEMG signals. Linear analysis, including amplitude probability distribution frequency （APDF）, amplitude analysis parameters such as roof mean square （RMS） and spectrum analysis parameter as median frequency （MF）, were used to calculate and indicate muscle load and muscular activity of bilateral CES and UT. Results During 200 minutes of sewing machine operating, the median load for the left cervical erector spinae （LCES）, right cervical erector spinae （RCES）, left upper trapezius （LUT） and right upper trapezius （RUT） were 6.78%MVE, 6.94%MVE, 6.47%MVE and 5.68%MVE, respectively. Work load of right muscles are significantly higher than that of the left muscles （P〈0.05）; sEMG signal analysis of isometric contractions indicated that the amplitude value before operating was significantly higher than that of after work （P 〈0.01）, and the spectrum value of bilateral CES and UT were significantly lower than those of after work （P 〈0.01）; according to the sEMG signal data of 20 time windows, with operating time pass by, the muscle activity patterns of bilateral CES and UT showed dynamic changes, the maximal amplitude of LCES, RCES, LUT occurred at the 20th time window, RUT at 16th time window, spectrum analysis showed that the lower value happened at 7th, 16th, 20th time windows. Conclusions Female sewing machine operators were exposed to high sustained static load on bilateral neck-shoulder muscles; left neck and shoulder muscles were held in more static positions; the 7th, 16th, and 20th time windows were muscle fatiQue period that erQonomics intervention can protocol at these periods.
文摘Traditional Chinese medicine scraping is a kind of natural therapy with a long history of simple and safe operation.It is easy to learn and tools are readily available,so that it has a very wide range of practical value.This paper introduces the definition and indications,function and standardization process of scraping technology,the technical operation specifications and matters needing attentions,as well as the application method of scraping technology,with a view to providing reference for clinical use of scraping technology in the treatment of cervical spondylosis,periarthritis of shoulder,lumbar muscle strain,hypertension,chloasma,and other diseases.
文摘This article introduces the function and manipulations of acupoint Chengshan(BL57) and presents six proven cases of stiff neck,acute lumbar muscle sprain,hemorrhoids,dysmenorrheal,shoulder periarthritis and gastrocnemius strain,so as to claim that point Chengshan(BL57) has a wide function and can be used effectively and safely.
文摘目的探讨电针关键肌结合“颈—肩—胸”调整术对颈型颈椎病伴上交叉综合征患者的临床效果。方法选取颈型颈椎病伴上交叉综合征患者70例,采用随机数字表法分为对照组和观察组,每组35例,对照组采用电针关键肌治疗,观察组在电针关键肌的基础上采用基于“筋骨并举”思想的“颈—肩—胸”调整术治疗。治疗前后分别运用中文版颈部疼痛和废用量表(Chinese version of neck pain and disability scale,SC-NPDS)对患者颈椎疼痛水平、功能、残疾及情绪和认知进行评分,测量治疗前后颈椎活动度的改变以及前肩角度(forward shoulder angle,FSA)、头前伸角度(forward head angle,FHA)的变化。结果与治疗前比较,两组治疗后SC-NPDS评分、FSA、FHA显著降低(P<0.05),颈椎左旋、右旋、左右侧屈、屈曲、伸展活动度显著升高(P<0.05);两组患者治疗前后SC-NPDS评分、颈椎活动度及FSA、FHA差值比较,差异均有统计学意义(P<0.05)。结论电针关键肌治疗颈型颈椎病伴上交叉综合征能减轻患者疼痛,改善颈椎大部分活动度及前倾姿势,而在此基础上采用“颈—肩—胸”调整术更能有效减轻患者疼痛,改善颈椎活动度,纠正患者静态头颈部前倾姿势。
