Effects of Bathing on Trapezius Muscle Fatigue Induced by Typewriting Task

Kimura, Mitsutoshi; Sato, Hirotaka; Ochi, Mamoru; Hosoya, Satoshi; Honywood, Michael; Sadoyama, Tsugutake

doi:10.5057/kei.7.163

Cited by 3 publications

(3 citation statements)

References 29 publications

(8 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From a methodological point of view, EMGs have often been used to investigate muscle fatigue [for example, [14][15][16][17][18] or expression of laughter [19,20]. However, there are few reports on studies that have employed EMG recording from a driver during acceleration in a real driving setting.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Driver-vehicle Matching using Neck Muscle Activity and Vehicle Dynamics

Iwamoto

Umetsu

Ozaki

2012

Kansei Engineering International Journal

View full text Add to dashboard Cite

Objective measurement of a car driver's feeling has been a subject of automobile researches. In the present study, we aimed at quantifying the matching between the physiological response of a driver and the vehicle motion. Assuming that the performance of a head stabilization mechanism, the vestibulo-collic reflex, affects driving feeling, we recorded the activity of neck muscles that help maintain the head position. Electromyograms (EMGs) were recorded from the sternocleidomastoid muscles (SCM) using active electrodes and a compact amplifier. Vehicle acceleration and gas pedal movement were recorded with small accelerometers. Subjects were required to perform straight-line acceleration. Four road cars with different characteristics were used. EMG signals were filtered, fullwave rectified and averaged across trials. Main results are summarized as follows. First, the EMG response of a driver's neck muscle depended not only on vehicle acceleration but on its time derivative, jerk. A quantitative analysis showed that, for the data obtained with the four cars, the EMG profile can be reproduced by a linear sum of acceleration and jerk. The correlation coefficient, an index of goodness of matching, ranged from ~0.8 to ~0.95. Second, our analysis indicated that the relationship between the muscle response and the vehicle motion can be characterized by two parameters: the optimal weight for the jerk term and the optimal time lag. The current study proposes a method for characterizing a physiological response of a driver to dynamic vehicle motion. It remains to be investigated whether these parameters are related to the driving feeling.

show abstract

Section: Discussionmentioning

confidence: 99%

Evaluation of Driver-vehicle Matching using Neck Muscle Activity and Vehicle Dynamics

Iwamoto

Umetsu

Ozaki

2012

Kansei Engineering International Journal

View full text Add to dashboard Cite

show abstract

“…If the head is located relatively forward compared to the trunk, it changes the head, neck and physical alignment, causing pain in the head, neck and spine, while also negatively affecting the balanced growth of the body 14 , 15 ) . This change in physical alignment in the sitting posture is a risk factor affecting body and trunk alignment.…”

Section: Introductionmentioning

confidence: 99%

Electromyography comparison of normal chair-desk system and assistant chair-desk system on fatigue

et al. 2015

View full text Add to dashboard Cite

[Purpose] This study was designed to test the effects of the Assistant Chair-Desk System (ACDS), which can reduce the forward tilt of the neck and trunk and the level of fatigue during long lasting study in the sitting position. [Subjects] Fourteen middle school students and 14 college students of mixed gender participated in this study. [Methods] Fatigue level, the trapezius muscle, and the forward tilt angle of the head and trunk as well as distance factors were assessed before after using a normal chair-desk system (NCDS) and the ACDS for 120 minutes. [Results] There was an interaction effect in the angle and length of the neck from the sitting posture changes after 2 hours of studying using the NCDS and ACDS. There were also significant differences in the fatigue levels, hip joint angles and the lengths from the head according to the main effects of the chair-systems. [Conclusion] The studying position while using the ACDS was determined to prevent significant fatigue levels of the muscle and body, provide support to the head, by limiting the forward movement of the neck, and prevent forward tilt of the neck and trunk, by enabling the target point and gaze to be closer to the horizontal direction.

show abstract

“…These therapies have also been experientially used to alleviate the tension and fatigue of muscles in European countries and Japan 9,10) . A previous study revealed hot water bathing has a psychological rather than physiological effect on the recovery of muscle fatigue after repetitive VDT work for 1 hour 11) . Moreover, previous papers indicated carbonated spring water has a suppressive effect on the sympathetic nerve system 12) and elevates body temperature via an increase in dermal blood flow [13][14][15] .…”

Section: Introductionmentioning

confidence: 99%

Effects of Thermotherapy with a Bath Additive Containing a Vasodilator on Chronic Shoulder-Neck Pain -Comparison with the Existing Remedies

et al. 2008

Self Cite

View full text Add to dashboard Cite

Abstract. The purpose of this study was to investigate the effects of thermotherapy using a bath additive containing a vasodilation agent on chronic shoulder-neck pain in comparison with conventional remedies. Male subjects reporting chronic shoulder-neck muscle pain and receiving frequent established remedies (group A: acupuncture; group B: massage; and group C: over-the-counter medicine) participated in this study. These treatments were replaced by treatment with carbon dioxide baths containing 3-octylphthalide (KYN) for 2 weeks. Changes in the subjects' symptoms were evaluated during the 2 weeks of KYN use and the following 2 weeks with a return to the initial treatments. Differences in the effects of treatment with KYN were found among these groups. In group B, significant decreases in VAS of overall symptoms in the shoulder-neck region, feelings of muscle tension, pain and difficulty in movement of the shoulder joint, and muscle hardness were found during the 2 weeks using KYN. Although decreases in the feelings of muscle tension, pain and difficulty in movement of the shoulder joint in group A, and decreases in the feelings of muscle tension, pain, and muscle hardness in group C were found, VAS of overall symptoms and other individual parameters did not significantly change. In conclusion, repeated treatments with KYN are thought to be more effective than conventional remedies. The differences in the effects of the treatment with KYN are ascribed to the etiology and symptoms that led to the subjects' initial remedies. Further studies are necessary to enhance these beneficial effects on shoulder-neck pain.

show abstract

Effects of Bathing on Trapezius Muscle Fatigue Induced by Typewriting Task

Cited by 3 publications

References 29 publications

Evaluation of Driver-vehicle Matching using Neck Muscle Activity and Vehicle Dynamics

Evaluation of Driver-vehicle Matching using Neck Muscle Activity and Vehicle Dynamics

Electromyography comparison of normal chair-desk system and assistant chair-desk system on fatigue

Effects of Thermotherapy with a Bath Additive Containing a Vasodilator on Chronic Shoulder-Neck Pain -Comparison with the Existing Remedies

Contact Info

Product

Resources

About