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Forces Loaded on the Back of Manual Material Handling Tasks' Workers of Food Industries in Malard Using"3D Static Strength Prediction Program”
Sayedtaghi Mirmohammadi, Ali Gholizadeh Abbasabad, Seyednourddin Mousavinasab, Seyed Esmaeil Hosseini Nejad, Homira Alizadeh,
Volume 2, Issue 3 (october 2018)
Abstract
Introduction: Manual Material Handling tasks can cause fatigue in the short term and increase physical workload and musculoskeletal injuries in the long term. The present study was conducted to determine the amount of forces entered to the lower back in workers with manual material handling tasks.
Methods: This descriptive-analytic study was conducted on 100 workers in food industries in Malard city in 2017. The Nordic questionnaire was used to determine the frequency of musculoskeletal disorders. The 3DSSPP was also applied to determine the amount of forces entered to the lower back of manual material handling tasks workers. Data analysis was conducted using SPSS (version 23)
Results: we found that 24percent of workers had discomfort in at least one of their nine musculoskeletal muscles. The results of 3DSSPP showed that 30 and 34 percent of the compressive forces entered into L5/S1 and L4/L5 discs, respectively. In addition, the shearing force loaded on the L5/S1 disc was also found to be higher than the permissible limit eight percent of the participants. No significant relationship was found between the frequency of musculoskeletal disorders and the amount of compressive and shear forces entered to the lower back of workers.
Conclusion: Based on NIOSH  recommended limits, the amount of compressive and shear forces entered to the lower back in 3DSSPP showed that in 30 percent of manual lifting load tasks, the risk of injury to the lower back was moderate and this risk was low in 70 percent of tasks.
Work Ability and Sleep Quality amongst Shift-Work Nurses
Taghi Mirmohammadi, Seyed Elham Gholami, Haji Haji Omid Kalteh, Seyed Norrodin Mosavinasab,
Volume 3, Issue 1 (april 2019)
Abstract

Introduction:

Nurses are forced to shiftwork due to the nature of the work. This shiftwork can reduce sleep time and affect the quality of work and their work ability. The aim of this study was to evaluate the effect of sleep quality on the work ability of nurses in Sari hospitals<span dir="RTL" style="line-height: 115%; font-family: " b="" nazanin";="" font-size:="" 12pt;="" mso-ansi-font-size:="" 11.0pt;="" mso-ascii-font-family:="" "times="" new="" roman";="" mso-hansi-font-family:="" roman";"="" lang="FA">.

Method:

This cross-sectional study was conducted in hospitals in Sari in 2017. Participants included 200 nurses selected by random selection. The Persian versions of Pittsburgh’s sleep quality questionnaires and Work Ability Index (WAI) were used to collect data. Descriptive statistics, Spearman correlation and linear regression tests were used for statistical tests.

Results:

The mean age of participants was 33.52 ± 7.22. The level of work ability equaled 37.55 ± 5.50 in the participants on the good level. The average sleep quality score was 8.79 ± 3.80. The findings showed that there is a significant and inverse correlation between sleep quality and work ability.

Conclusion:

This study confirmed that sleep quality has a high effect on nurses' work ability and function.


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