مقاله انگلیسی رایگان در مورد تأثیر بارگیری و فواصل استراحت بین کار بر میکرو ترومای عضلات – الزویر ۲۰۱۹

elsevier

 

مشخصات مقاله
ترجمه عنوان مقاله تأثیر بارگیری و فواصل استراحت بین کار بر میکرو ترومای عضلات
عنوان انگلیسی مقاله Impact of loading and work rest intervals on muscle micro-trauma
انتشار مقاله سال ۲۰۱۹
تعداد صفحات مقاله انگلیسی ۸ صفحه
هزینه دانلود مقاله انگلیسی رایگان میباشد.
پایگاه داده نشریه الزویر
نوع نگارش مقاله
مقاله پژوهشی (Research Article)
مقاله بیس این مقاله بیس نمیباشد
نمایه (index) Scopus – Master Journals List – JCR
نوع مقاله ISI
فرمت مقاله انگلیسی  PDF
ایمپکت فاکتور(IF)
۲٫۰۸۱ در سال ۲۰۱۸
شاخص H_index ۶۹ در سال ۲۰۱۹
شاخص SJR ۰٫۵۴۶ در سال ۲۰۱۸
شناسه ISSN ۰۱۶۹-۸۱۴۱
شاخص Quartile (چارک) Q2 در سال ۲۰۱۸
مدل مفهومی ندارد
پرسشنامه ندارد
متغیر ندارد
رفرنس دارد
رشته های مرتبط پزشکی
گرایش های مرتبط آسیب شناسی پزشکی و پزشکی داخلی
نوع ارائه مقاله
ژورنال
مجله  مجله بین المللی ارگونومی صنعتی – International Journal Of Industrial Ergonomics
دانشگاه Industrial and Systems Engineering Department, Auburn University, Auburn, AL, USA
کلمات کلیدی اختلال اسکلتی-عضلانی (MSD)، فاصله استراحت، بارگیری، کیناز کراتین (CK)، میکرو تروما عضله اسکلتی، ورزش خارج از مرکز
کلمات کلیدی انگلیسی Musculoskeletal disorder (MSD)، Rest interval، Loading، Creatine kinase (CK)، Skeletal muscle micro-trauma، Eccentric exercise
شناسه دیجیتال – doi
https://doi.org/10.1016/j.ergon.2018.03.002
کد محصول E12982
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فهرست مطالب مقاله:
Abstract

۱- Introduction

۲- Method

۳- Results

۴- Discussion

۵- Conclusion

References

 

بخشی از متن مقاله:

Abstract

Purpose: To examine whether rest intervals of different durations (“High Rest, Low Frequency” v. “Low Rest, High Frequency”), and load at different force exertion levels with different repetition frequencies (“High Load, Low Repetition” v. “Low Load, High Repetition”) have an impact on muscle micro-trauma, as such micro-trauma over repetitive loading and long-term muscle overuse can lead to musculoskeletal disorders (MSDs).
Method: Twenty-four adult males (mean age: 24.1 years; 3.6 SD) were randomly assigned to one of 4 bicep muscle eccentric exercise treatment groups (n = ۶; “High Load, Low Repetition; High Rest, Low Frequency”, “High Load, Low Repetition; Low Rest, High Frequency”, “Low Load, High Repetition; High Rest, Low Frequency”, or “Low Load, High Repetition; Low Rest, High Frequency”) with non-dominant arm to induce muscle micro-trauma reactions in serum. Subjects in all treatment groups had equivalent total work volume, total rest duration and total work duration for comparison of muscle micro-trauma between and within the treatment groups. Muscle micro-trauma biomarker serum Creatine Kinase (CK) level was measured pre-exercise (Day 0) and post-exercise on Days 1, 2, 4, and 8. ANOVA with repeated measures was used to examine significance of rest and load-repetition combination over pre and post experiment days, as well as possible interactions.
Result: CK levels fluctuated significantly across different “Day” (P = ۰٫۰۱۱۵). Interaction was disordinal and significant between “Day” and “Rest” (P = ۰٫۰۰۰۰), and “Load” and “Rest” (P = ۰٫۰۳۲۲). Under “High Load, Low Repetition” condition, CK levels on Day 4 were significantly higher than on Days 0 and 2; CK levels on Day 8 were significantly higher than Day 0. CK level peaked on Day 4. Under “Low Rest” Condition, CK level on Days 4 and 8 are significantly higher than Day 0.
Conclusion: Shorter but more frequent rest intervals led to more extreme muscle micro-traumatic responses than the longer but less frequent ones, especially under “High Load, Low Repetition” condition when non-dominant bicep brachii was subscribed with eccentric exercise regimen.
Relevance: to industry The exploration of how rest scheduling affects progression of microtrauma from a biomechanical and molecular level in this study furthers current understanding of the early stage development of WMSDs. With future studies’ further research and confirmation, the findings of this study may be able to serve as a first attempt to guide shift scheduling and job design at manufacturing facilities.

Introduction

The US Department of Labor defines work-related Musculoskeletal Disorders (WMSDs) as musculoskeletal system and connective tissue diseases and disorders, involving overexertion, repetitive motion and vibration that lead to living tissue sprains, strains, tears, as well as pain, swelling, and numbness. MSDs represent one of the leading causes of lost workdays in industry and are associated with major economic costs. Occupational Safety and Health Administration (OSHA) estimated that “work-related MSDs in the United States account for over 600,000 injuries and illnesses and 34 percent of all lost workdays reported to the Bureau of Labor Statistics (BLS, 2016). These disorders now account for one out of every three dollars spent on workers’ compensation. It is estimated that employers spend as much as 20 billion dollars a year (U.S.) on direct costs for MSD-related workers’ compensation, and up to five times that much for indirect costs, such as those associated with hiring and training replacement workers” (OSHA, 2014).

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