Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia
Prolonged standing has been identified as one of the risk factors which associated with occupational injuries. The workers tend to suffer from Musculoskeletal Disorders (MSDs) after a chronic exposure of prolonged standing while performing their task. Such disorders can cause performance decremen...
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my-upm-ir.904102021-07-29T01:51:14Z Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia 2019-10 Abdul Aziz, Adriana Prolonged standing has been identified as one of the risk factors which associated with occupational injuries. The workers tend to suffer from Musculoskeletal Disorders (MSDs) after a chronic exposure of prolonged standing while performing their task. Such disorders can cause performance decrement and high rate of absenteeism among the workers. Therefore, ergonomic intervention such as footrest could be used, in order to reduce the muscle activity among workers. The main objective for this study is to determine the effect of footrest on muscle activity during prolonged standing activity. A total of 74 workers chosen from the Assembly Line from selected factory were divided into control (without footrest) and experimental (with footrest) group. The response rate obtained was 100% for this research. The respondents were required to perform the given task while standing for two hours continuously. The perceived exertion rating in both groups was evaluated (for every 15 minutes) by using Borg’s Scale CR-10 Questionnaire. Meanwhile, surface electromyography (sEMG) was used to monitor the muscle activity (right and left of the lower leg around calf area) specifically at tibialis and gastrocnemius muscles in both control and experimental groups throughout the experimental durations. The average of perceived exertion rating indicated by control group (0.07) was higher than experimental group (0.04) throughout the 2 hours session of prolonged standing for neck/head, shoulder, upper back, hands, lower back, buttocks, thighs, knees, calves and feet. However, these rating did not exceed more than 5. The results of statistical analysis has shown that perceived exertion rating on the lower body regions (lower back, knees, calves and feet) was significantly (p<0.05) more affected by prolonged standing compared to the upper body regions (neck/head, shoulder, upper back and hands) during the two hours period for both groups. The average of reduction of surface electromyography (sEMG) levels for both right and left tibilais anterior muscles and gastrocnemius posterior muscles respectively were 0.02 in experimental group when compared to the control group. There were statistically significant differences in the sEMG levels between control and experimental groups for both in the right and left studied muscles at the 60th minute within the experimental session. There was reduction of perceived exertion rating when assessed by using Borg’s Scale CR-10 and level of surface electromyography in experimental group than the control group. The intervention of footrest provides internal mechanism which reduces the muscle activity on body parts. This concluded that it was significant to state that footrest is success ergonomics’ intervention in terms of minimizing muscle activity in a prolonged standing work posture. Occupational Injuries - diagnosis Occupational Injuries - therapy Occupational Health 2019-10 Thesis http://psasir.upm.edu.my/id/eprint/90410/ http://psasir.upm.edu.my/id/eprint/90410/1/FPSK%28m%29%202020%2015%20-%20IR.pdf text en public masters Universiti Putra Malaysia Occupational Injuries - diagnosis Occupational Injuries - therapy Occupational Health Karuppiah, Karmegam |
| institution |
Universiti Putra Malaysia |
| collection |
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| language |
English |
| advisor |
Karuppiah, Karmegam |
| topic |
Occupational Injuries - diagnosis Occupational Injuries - therapy Occupational Health |
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Occupational Injuries - diagnosis Occupational Injuries - therapy Occupational Health Abdul Aziz, Adriana Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| description |
Prolonged standing has been identified as one of the risk factors which associated
with occupational injuries. The workers tend to suffer from Musculoskeletal
Disorders (MSDs) after a chronic exposure of prolonged standing while performing
their task. Such disorders can cause performance decrement and high rate of
absenteeism among the workers. Therefore, ergonomic intervention such as footrest
could be used, in order to reduce the muscle activity among workers. The main
objective for this study is to determine the effect of footrest on muscle activity
during prolonged standing activity. A total of 74 workers chosen from the Assembly
Line from selected factory were divided into control (without footrest) and
experimental (with footrest) group. The response rate obtained was 100% for this
research. The respondents were required to perform the given task while standing for
two hours continuously. The perceived exertion rating in both groups was evaluated
(for every 15 minutes) by using Borg’s Scale CR-10 Questionnaire. Meanwhile,
surface electromyography (sEMG) was used to monitor the muscle activity (right
and left of the lower leg around calf area) specifically at tibialis and gastrocnemius
muscles in both control and experimental groups throughout the experimental
durations. The average of perceived exertion rating indicated by control group (0.07)
was higher than experimental group (0.04) throughout the 2 hours session of
prolonged standing for neck/head, shoulder, upper back, hands, lower back,
buttocks, thighs, knees, calves and feet. However, these rating did not exceed more
than 5. The results of statistical analysis has shown that perceived exertion rating on
the lower body regions (lower back, knees, calves and feet) was significantly
(p<0.05) more affected by prolonged standing compared to the upper body regions
(neck/head, shoulder, upper back and hands) during the two hours period for both
groups. The average of reduction of surface electromyography (sEMG) levels for
both right and left tibilais anterior muscles and gastrocnemius posterior muscles
respectively were 0.02 in experimental group when compared to the control group.
There were statistically significant differences in the sEMG levels between control
and experimental groups for both in the right and left studied muscles at the 60th
minute within the experimental session. There was reduction of perceived exertion
rating when assessed by using Borg’s Scale CR-10 and level of surface
electromyography in experimental group than the control group. The intervention of
footrest provides internal mechanism which reduces the muscle activity on body
parts. This concluded that it was significant to state that footrest is success
ergonomics’ intervention in terms of minimizing muscle activity in a prolonged
standing work posture. |
| format |
Thesis |
| qualification_level |
Master's degree |
| author |
Abdul Aziz, Adriana |
| author_facet |
Abdul Aziz, Adriana |
| author_sort |
Abdul Aziz, Adriana |
| title |
Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| title_short |
Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| title_full |
Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| title_fullStr |
Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| title_full_unstemmed |
Effect of footrest on muscle activities during prolonged standing among workers in selected factories in Malaysia |
| title_sort |
effect of footrest on muscle activities during prolonged standing among workers in selected factories in malaysia |
| granting_institution |
Universiti Putra Malaysia |
| publishDate |
2019 |
| url |
http://psasir.upm.edu.my/id/eprint/90410/1/FPSK%28m%29%202020%2015%20-%20IR.pdf |
| _version_ |
1747813621035958272 |