The Influence of the Relative Working Position as a Function of Body Dimensions on Working Posture, Compression Load on L5/S1 and Muscle Activity

2014 ◽

Vol 606 ◽

pp. 247-251

Author(s):

Yanti Sri Rejeki ◽

Nur Rahman As'ad ◽

Eri Achiraeniwati

Keyword(s):

The Body ◽

Small Scale ◽

Body Dimension ◽

Body Dimensions ◽

Work Station ◽

Shoe Industry ◽

Working Posture ◽

Small Industries ◽

The City ◽

Small Scale Industries

Cibaduyut is the center of the shoe industry in the city of Bandung, West Java Indonesia. Shoes that are produced here are mostly produced by small-scale industries scattered in Cibaduyut area. The process of making shoes that are made by small industries, still uses simple facilities and techniques, with no attention to the aspect of comfort, safety and occupational health. The work facilities used today causes inconvenience to employees in their work. The results of the survey (by distributing Discomfort Questionnairre), we obtained information stating that the workers complained on several problems concerning the body dimension during the work progress. From this illustration we can say that it is necessary to evaluate the working posture to minimize the risks arising from the work by methods RULA (Rapid Upper Limb Assessment). The results obtained from Rula shows some works that are done are at the level 4, which means that this work belongs to high risk and needs to be improved immediately. Therefore we should provide the design facilities such as desk to work in pattern, sole, and finishing work station which are needed to improve posture. The size of product design tailored to the size of the body dimensions of workers with anthropometric methods. The design of the facility will improve the posture of workers in their work.

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Posture in dentists: Sitting vs. standing positions during dentistry work - an EMG study

Srpski arhiv za celokupno lekarstvo ◽

10.2298/sarh1604181p ◽

2016 ◽

Vol 144 (3-4) ◽

pp. 181-187 ◽

Cited By ~ 4

Author(s):

Natasa Pejcic ◽

Milica Djuric-Jovicic ◽

Nadica Miljkovic ◽

Dejan Popovic ◽

Vanja Petrovic

Keyword(s):

Muscle Activity ◽

Standing Position ◽

The Body ◽

Working Posture ◽

Working Postures ◽

Significant Difference ◽

Splenius Capitis ◽

Muscle Groups ◽

The Right ◽

Electromyography Signals

Introduction. Adequate working posture is important for overall health. Inappropriate posture may increase fatigue, decrease efficiency, and eventually lead to injuries. Objective. The purpose was to examine posture positions used during dentistry work. Methods. In order to quantify different posture positions, we recorded muscle activity and positions of body segments. The position (inclination) data of the back was used to assess two postures: sitting and standing during standard dental interventions. Results. During standard interventions, whether sitting or standing, a tilt of less than 20 degrees was most prevalent in the forward and lateral flexion directions. Amplitude of electromyography signals corresponding to the level of muscle activity were higher in sitting compared with the electromyography in standing position for all muscle groups on the left and right side of the body. Significant difference between muscle activity in two working postures was evident in splenius capitis muscle on the left (p = 0.032), on the right side of the body (p = 0.049) and in muscle activity of mastoid muscle on the left side (p = 0.029). Conclusion. These findings show that risk for increased fatigue and possible injures can be reduced by combining the sitting and standing occupational postures.

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Using Electromyography to Assess Postural Load in Dentistry: A Literature Review

Journal of Advances in Medicine and Medical Research ◽

10.9734/jammr/2020/v32i2330714 ◽

2020 ◽

pp. 23-35

Author(s):

Júlia Margato Pazos ◽

Patricia Petromilli Nordi Sasso Garcia

Keyword(s):

Literature Review ◽

Muscle Activity ◽

Review Of The Literature ◽

Working Posture ◽

Postural Load ◽

Dental Work

This study sought to perform a review of the literature on the use of electromyography to assess postural load in dental work. The literature used in this review was obtained from databases and only articles published published between 1991 and 2019 were considered. The main keywords were “electromyography,” "working posture”, “ergonomics” and “muscle activity”. Each abstract was read to determine whether the information in the article included discussions on the use of electromyography to assess postural load in dental work (n=27). It was found that electromyography is beneficial to assess the influence of different devices used in dental work, however, as it has limitations, researchers must be aware of them to seek alternatives to circumvent them.

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Physical Welding Factors for Reclassified Welding Positions in Shipbuilding Assembly Process Based on Muscle Activity Measured by Surface Electromyography

Journal of Marine Science and Engineering ◽

10.3390/jmse9111211 ◽

2021 ◽

Vol 9 (11) ◽

pp. 1211

Author(s):

So-Yeon Baek ◽

Jong-Ho Nam

Keyword(s):

Muscle Activity ◽

Important Determinant ◽

Complex Structure ◽

Welding Process ◽

Assessment Method ◽

Important Variable ◽

Shipbuilding Industry ◽

Working Posture ◽

Working Postures ◽

Physiological Assessment

Welding, a key technology in the shipbuilding industry, is mostly performed by hand, owing to the complex structure and shape of production blocks. This manual welding requires a variety of working postures, which have become an important determinant of the worker’s workload and, consequently, assembly man-hours. Currently, major shipyards calculate welding man-hours by reflecting the welding factor, which is defined as the working time consumed in the welding process. A set of welding factors is known to be based on the accumulated experience in shipyards, whereas the verification or derivation process for these factors is not disclosed or available. This study proposed a method for quantitatively calculating work difficulty for welding positions based on the working posture in a process where the posture acts as an important variable. Standard welding positions reflecting the actual welding work at shipyards were established. A physiological assessment method was used to propose the physical welding factor by analyzing the measured muscle activity. The validity of the proposed method was verified by comparing the results of a musculoskeletal simulation package and shipyard welding factors. The proposed method can be readily applied to other fields in which workers’ physical activities are involved.

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Myoelectric Activity Differences in Three Learning Sessions

Journal of Psychophysiology ◽

10.1027//0269-8803.16.2.92 ◽

2002 ◽

Vol 16 (2) ◽

pp. 92-96

Author(s):

Tiina Ritvanen ◽

Reijo Koskelo ◽

Osmo H„nninen

Keyword(s):

High School Students ◽

Muscle Activity ◽

Muscle Tension ◽

Emg Activity ◽

Traditional Learning ◽

Myoelectric Activity ◽

School Students ◽

Language Laboratory ◽

Upper Trapezius ◽

Muscle Groups

Abstract This study follows muscle activity in three different learning sessions (computer, language laboratory, and normal classroom) while students were studying foreign languages. Myoelectric activity was measured in 21 high school students (10 girls, 11 boys, age range 17-20 years) by surface electromyography (sEMG) from the upper trapezius and frontalis muscles during three 45-min sessions. Root mean square (RMS) average from both investigated muscles was calculated. The EMG activity was highest in both muscle groups in the computer-aided session and lowest in the language laboratory. The girls had higher EMG activity in both investigated muscle groups in all three learning situations. The measured blood pressure was highest at the beginning of the sessions, decreased within 10 min, but increased again toward the end of the sessions. Our results indicate that the use of a computer as a teaching-aid evokes more constant muscle activity than the traditional learning situations. Since muscle tension can have adverse health consequences, more research is needed to determine optimal classroom conditions, especially when technical aids are used in teaching.

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