Oxygen Uptake Dynamics Conform to Acute Changes in Muscle Excitation and Total Hemoglobin Concentration during Constant-Work Rate Exercise

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Autor(es): dc.contributorUniversity of Calgary-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversity of Brescia-
Autor(es): dc.contributorHamad Bin Khalifa University-
Autor(es): dc.creatorMarinari, Gabriele-
Autor(es): dc.creatorTrama, Robin-
Autor(es): dc.creatorZagatto, Alessandro M.-
Autor(es): dc.creatorIannetta, Danilo-
Autor(es): dc.creatorMurias, Juan M.-
Data de aceite: dc.date.accessioned2025-08-21T18:57:14Z-
Data de disponibilização: dc.date.available2025-08-21T18:57:14Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1249/MSS.0000000000003700-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/296967-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/296967-
Descrição: dc.descriptionWhether electromyography (EMG)-derived muscle excitation and near-infrared spectroscopy (NIRS)-derived total hemoglobin and myoglobin concentration (total[Hb + Mb]) are linked during cycling exercise is unknown. Purpose to investigate whether muscle excitation during constant-work rate (WR) cycling is connected with total[Hb + Mb] and interact with oxygen uptake (VO2) dynamics. Methods Experiment 1: ten participants performed a 21-min constant-WR (CWR) within the heavy-intensity domain (i.e., 75% of the difference between the gas exchange threshold and the maximal metabolic steady state), and a ramp-to-constant-WR (rCWR) to the same WR. CWR and rCWR were repeated twice and allocated in random order. Experiment 2: nine participants performed a double-constant-WR (dCWR) consisting of a 21-min exercise bout, a short 20-sec break, and a second bout of 21 min within the heavy domain. VO2, EMG root mean square (EMGRMS), total[Hb + Mb] and deoxygenated hemoglobin ([HHb]) were collected from the vastus lateralis. The EMGRMS/total[Hb + Mb] and EMGRMS/[HHb] ratios were computed. Results The EMGRMS was lower at min 1 and 7 and total[Hb + Mb] higher at min 1 during the rCWR compared to the CWR condition (all P < 0.05). EMGRMS displayed an overshoot at min 1 which was different from min 21 during the CWR condition (P < 0.05). EMGRMS did not display an overshoot following the 20 sec break during the dCWR condition. The EMGRMS/total[Hb + Mb] inverted ratio was not different from VO2 (%). The EMG magnitude of frequencies ranging from ∼30-to-90 Hz was initially higher and decreased over time (P < 0.05). Conclusions This study demonstrated that EMGRMS-derived muscle excitation can be reduced by exercise protocols that promote higher total[Hb + Mb]. Furthermore, the interaction between muscle excitation and total[Hb + Mb] matched with systemic VO2.-
Descrição: dc.descriptionFaculty of Kinesiology University of Calgary-
Descrição: dc.descriptionLaboratory of Physiology and Sport Performance (LAFIDE) Department of Physical Education School of Sciences São Paulo State University-UNESP-
Descrição: dc.descriptionDepartment of Clinical and Experimental Sciences University of Brescia-
Descrição: dc.descriptionSchool of Health and Life Sciences Hamad Bin Khalifa University-
Descrição: dc.descriptionLaboratory of Physiology and Sport Performance (LAFIDE) Department of Physical Education School of Sciences São Paulo State University-UNESP-
Idioma: dc.languageen-
Relação: dc.relationMedicine and Science in Sports and Exercise-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDEOXYGENATED HEMOGLOBIN-
Palavras-chave: dc.subjectMUSCLE EXCITATION-
Palavras-chave: dc.subjectOXIDATIVE PHOSPHORYLATION-
Palavras-chave: dc.subjectOXYGEN UPTAKE KINETICS-
Palavras-chave: dc.subjectTOTAL HEMOGLOBIN CONCENTRATION-
Título: dc.titleOxygen Uptake Dynamics Conform to Acute Changes in Muscle Excitation and Total Hemoglobin Concentration during Constant-Work Rate Exercise-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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