Free-running circadian rhythms of muscle strength, reaction time, and body temperature in totally blind people

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dc.contributor.authorSquarcini, Camila Fabiana Rossi
dc.contributor.authorPires, Maria Laura Nogueira [UNESP]
dc.contributor.authorLopes, Cleide
dc.contributor.authorBenedito-silva, Ana AmÉlia
dc.contributor.authorEsteves, Andrea Maculano
dc.contributor.authorCornelissen-guillaume, Germaine
dc.contributor.authorMatarazzo, Carolina
dc.contributor.authorGarcia, Danilo
dc.contributor.authorSilva, Maria Stella Peccin
dc.contributor.authorTufik, Sergio
dc.contributor.authorMello, Marco TÚlio
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2015-08-21T17:53:17Z
dc.date.available2015-08-21T17:53:17Z
dc.date.issued2013
dc.description.abstractLight is the major synchronizer of circadian rhythms. In the absence of light, as for totally blind people, some variables, such as body temperature, have an endogenous period that is longer than 24 h and tend to be free running. However, the circadian rhythm of muscle strength and reaction time in totally blind people has not been defined in the literature. The objective of this study was to determine the period of the endogenous circadian rhythm of the isometric and isokinetic contraction strength and simple reaction time of totally blind people. The study included six totally blind people with free-running circadian rhythms and four sighted people (control group). Although the control group required only a single session to determine the circadian rhythm, the blind people required three sessions to determine the endogenous period. In each session, isometric strength, isokinetic strength, reaction time, and body temperature were collected six different times a day with an interval of at least 8 h. The control group had better performance for strength and reaction time in the afternoon. For the blind, this performance became delayed throughout the day. Therefore, we conclude that the circadian rhythms of strength and simple reaction time of totally blind people are within their free-running periods. For some professionals, like the blind paralympic athletes, activities that require large physiological capacities in which the maximum stimulus should match the ideal time of competition may result in the blind athletes falling short of their expected performance under this free-running condition.en
dc.description.affiliationUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Psicologia Experimental e do Trabalho, Faculdade de Ciências e Letras de Assis, Assis, Avenida Dom Antônio 2100, Parque Universitário, CEP 19806-900, SP, Brasil
dc.description.affiliationUnespUniversidade Estadual Paulista Júlio de Mesquita Filho, Departamento de Psicologia Experimental e do Trabalho, Faculdade de Ciências e Letras de Assis, Assis, Avenida Dom Antônio 2100, Parque Universitário, CEP 19806-900, SP, Brasil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 1998/14303-3
dc.description.sponsorshipIdFAPESP: 2004/11913-8
dc.format.extent157-165
dc.identifierhttp://link.springer.com/article/10.1007%2Fs00421-012-2415-8
dc.identifier.citationEuropean Journal of Applied Physiology, v. 113, n. 1, p. 157-165, 2013.
dc.identifier.doi10.1007/s00421-012-2415-8
dc.identifier.issn1439-6327
dc.identifier.lattes1562901974105550
dc.identifier.lattes1375290481822767
dc.identifier.urihttp://hdl.handle.net/11449/126836
dc.language.isoeng
dc.relation.ispartofEuropean Journal of Applied Physiology
dc.relation.ispartofsjr1,186
dc.rights.accessRightsAcesso aberto
dc.sourceCurrículo Lattes
dc.subjectChronobiology disordersen
dc.subjectIsokinetic strengthen
dc.subjectIsometric strengthen
dc.subjectParalympics athletesen
dc.titleFree-running circadian rhythms of muscle strength, reaction time, and body temperature in totally blind peopleen
dc.typeArtigo
unesp.author.lattes1562901974105550
unesp.author.lattes1375290481822767
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências e Letras, Assispt
unesp.departmentPsicologia Experimental e do Trabalhopt

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