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Do active pauses change muscle electrical activity and oxygenation during repetitive manual task?

Grant number: 15/13581-7
Support type:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): October 04, 2015
Effective date (End): September 26, 2016
Field of knowledge:Health Sciences - Physiotherapy and Occupational Therapy
Principal Investigator:Ana Beatriz de Oliveira
Grantee:Letícia Bergamin Januário
Supervisor abroad: Pascal Madeleine
Home Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Local de pesquisa : Aalborg University (AAU), Denmark  
Associated to the scholarship:13/05761-0 - Do active pauses change muscle electrical activity and oxygenation during repetitive manual task?, BP.DD


The aim of this project is to study the effects of active pauses on trapezius and serratus anterior muscles during a simulated low-level static repetitive industrial task at two different paces. The experimental procedure was based on a standardized repetitive task (non-computer based task), performed on a simulated environment. Thirty women (15 healthy and 15 with chronic trapezius myalgia) were evaluated for muscle activity (surface electromyography - sEMG) and muscle oxygenation (near-infrared spectroscopy - NIRS). The neck-shoulder region was investigated (upper - clavicular and acromial, middle and lower portions of the trapezius and serratus anterior muscles). Both head position and arm elevation postures were recorded in order to control possible confounders. All experimental procedure were performed in Brazil and part of the data processing will be performed during the internship abroad at the Center for Sensory-Motor Interaction (SMI) in cooperation with Professors Pascal Madeleine and Afshin Samani. It will be considerate simple data processing, such as Root Mean Square (RMS) and Relative Rest Time (RRT), as well as more advanced techniques (Exposure Variation Analysis - EVA and Normalized Mutual Information - NMI), well known and applied by the Professor Madeleine team. This international partnership was established since the beginning of this PhD and the internship was proposed in the initial application of the current grant. Besides analyzing and discussing the data collected in Brazil, the PhD student will be also able to participate in other ongoing projects at the international center. Overall, we believe that the results will contribute with scientific evidence on the beneficial effect of active pauses and to support practitioners to better apply pauses at work. Moreover, the Brazilian research group will improve its ability to perform modern data processing, particularly in sEMG data.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
JANUARIO, LETICIA BERGAMIN; MADELEINE, PASCAL; CID, MARINA MACHADO; SAMANI, AFSHIN; OLIVEIRA, ANA BEATRIZ. Can exposure variation be promoted in the shoulder girdle muscles by modifying work pace and inserting pauses during simulated assembly work?. APPLIED ERGONOMICS, v. 66, p. 151-160, JAN 2018. Web of Science Citations: 4.
JANUARIO, LETICIA BERGAMIN; OLIVEIRA, ANA BEATRIZ; CID, MARINA MACHADO; MADELEINE, PASCAL; SAMANI, AFSHIN. The coordination of shoulder girdle muscles during repetitive arm movements at either slow or fast pace among women with or without neck-shoulder pain. HUMAN MOVEMENT SCIENCE, v. 55, p. 287-295, OCT 2017. Web of Science Citations: 1.
JANUARIO, LETICIA BERGAMIN; CARREIRA MOREIRA, ROBERTA DE FATIMA; CID, MARINA MACHADO; SAMANI, AFSHIN; MADELEINE, PASCAL; OLIVEIRA, ANA BEATRIZ. Effects of active pause pattern of surface electromyographic activity among subjects performing monotonous tasks: A systematic review. JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY, v. 30, p. 196-208, OCT 2016. Web of Science Citations: 7.

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