close
This essay has been submitted by a student. This is not an example of the work written by professional essay writers.

The Development of Musculoskeletal Disorders

downloadDownload printPrint

Pssst… we can write an original essay just for you.

Any subject. Any type of essay.

We’ll even meet a 3-hour deadline.

Get your price

121 writers online

blank-ico
Download PDF

The article “Sex differences in kinematic adaptations to muscle fatigue induced by repetitive upper limb movements” discusses about the development of musculoskeletal disorders that may be caused by repetitive muscles movements that create muscle fatigue. When it comes to muscle fatigue men and women manage to respond differently during isometric single joint efforts. However, sex difference when doing multiple joint task has not yet been identified. In this study both men and women must adapt their upper body (kinematics) during a RPT (repetitive pointing task). The study included 40 men and 41 women performing various muscle movements using their dominant arm and had to reach a level of perceived exertion of 8/10. It started where the participants repeatedly moved there dominant arm, at a proximal and distal target.

In the article it claims, “They maintained a rhythm of one movement per second (2 s for a cycle) set by a metronome” (Fuller et al). The metronome is used to provide auditory feedback in order to help the participants maintain their pace. Additionally, to make sure the participants elbow’s were elevated, a mesh barrier was added and positioned under their elbow motion trajectory. The tasks were done until the participants reach an RPE of 8/10. Data was required for the upper body and trunk. This was done by using a six-camera motion capture system. There were reflective markers placed on the upper arm, trunk, forearm. Furthermore, before performing the RPT, the participants must be in anatomical position. The variables being analyzed during this study, are the trunk-global, humero thoracic, elbow, as well as the joints in the wrist and hand.

In this study, both sex group performed the RPT for the same amount of time. Many similarities as well as differences were found between the men and women in this study. Some similarities that were found was their endurance time as well as their kinematic adaptations during RPT. Additionally, for both the men and women, it seemed that there trunk range of motion increased with fatigue,while their shoulders and elbow’s decreased.

During the study, the men had more of a decrease than the women when it came to their humero thoracic elevation. However, the women manage to increase their humero thoracic elevation when doing movement to movement variability. These differences help show that the men’s humero thoracic elevator muscles managed to be more fatigued than the women. This could be because the women’s muscles managed to adapt better than the men’s. Men (7.4 ± 3.2 min) and women (8.3 ± 4.5 min) performed the repetitive pointing task for a similar duration. For both sex groups, trunk range of motion increased with fatigue while shoulders and elbows decreased. Moreover, participants modified their trunk posture to compensate for the decreased humero thoracic elevation. Movements at all joints also became more variable with fatigue. However, of the 24 joint angle variables assessed, only two Sex × Fatigue interactions were observed.

Although average humero thoracic elevation angle decreased in both subgroups, thisdecrease was greater in men (standardized response mean [SRM] − 1.63) than in women (SRM − 1.44). Moreover, the movement-to-movement variability of humerus thoracic elevation angle increased only in women (SRM 0.42 elevator muscles were more fatigued than women’s despite a similar perceived exertion or that they adapted differently to a similar level of muscle fatigue. Finally, different pre-fatigue movement parameters are related to endurance time in men vs women. Those results highlight the complexity of the phenomenon of fatigue and its impact on motor behavior.

infoRemember: This is just a sample from a fellow student.

Your time is important. Let us write you an essay from scratch

100% plagiarism-free

Sources and citations are provided

Find Free Essays

We provide you with original essay samples, perfect formatting and styling

Cite this Essay

To export a reference to this article please select a referencing style below:

The Development of Musculoskeletal Disorders. (2020, May 19). GradesFixer. Retrieved June 20, 2021, from https://gradesfixer.com/free-essay-examples/the-development-of-musculoskeletal-disorders/
“The Development of Musculoskeletal Disorders.” GradesFixer, 19 May 2020, gradesfixer.com/free-essay-examples/the-development-of-musculoskeletal-disorders/
The Development of Musculoskeletal Disorders. [online]. Available at: <https://gradesfixer.com/free-essay-examples/the-development-of-musculoskeletal-disorders/> [Accessed 20 Jun. 2021].
The Development of Musculoskeletal Disorders [Internet]. GradesFixer. 2020 May 19 [cited 2021 Jun 20]. Available from: https://gradesfixer.com/free-essay-examples/the-development-of-musculoskeletal-disorders/
copy to clipboard
close

Sorry, copying is not allowed on our website. If you’d like this or any other sample, we’ll happily email it to you.

    By clicking “Send”, you agree to our Terms of service and Privacy statement. We will occasionally send you account related emails.

    close

    Attention! This essay is not unique. You can get a 100% Plagiarism-FREE one in 30 sec

    Receive a 100% plagiarism-free essay on your email just for $4.99
    get unique paper
    *Public papers are open and may contain not unique content
    download public sample
    close

    Sorry, we could not paraphrase this essay. Our professional writers can rewrite it and get you a unique paper.

    close

    Thanks!

    Your essay sample has been sent.

    Want us to write one just for you? We can custom edit this essay into an original, 100% plagiarism free essay.

    thanks-icon Order now
    boy

    Hi there!

    Are you interested in getting a customized paper?

    Check it out!
    Having trouble finding the perfect essay? We’ve got you covered. Hire a writer
    exit-popup-close

    Haven't found the right essay?

    Get an expert to write you the one you need!

    exit-popup-print

    Professional writers and researchers

    exit-popup-quotes

    Sources and citation are provided

    exit-popup-clock

    3 hour delivery

    exit-popup-persone