title: Are the oxygen uptake and heart rate off-kinetics influenced by the intensity of prior exercise?
abstract: The aim of this study was to investigate the effect of prior exercise on the heart rate (HR) and oxygen uptake (VO2) off-kinetics after a subsequent high-intensity running exercise. Thirteen male futsal players (age 22.8±6.1years) performed a series of high-intensity bouts without prior exercise (control), preceded by a prior same intensity continuous exercise (CE+CE) and a prior sprint exercise (SE+CE). The magnitude of excess post-exercise oxygen consumption (EPOCm-4.25±0.19 vs. 3.69±0.20Lmin(-1) in CE+CE and 3.62±0.18Lmin(-1) in control; p<0.05) and the parasympathetic reactivation (HRR60s-33±3 vs. 37±3bpm in CE+CE and 42±3 bpm in control; p<0.05) in the SE+CE were higher and slower, compared with another two conditions. The EPOCτ (time to attain 63% of total response; 53±2s) and the heart rate time-course (HRτ-86±5s) were significantly longer after the SE+CE condition than control transition (48±2s and 69±5s, respectively; p<0.05). The SE+CE induce greater stress on the metabolic function, respiratory system and autonomic nervous system regulation during post-exercise recovery than CE, highlighting that the inclusion of sprint-based exercises can be an effective strategy to increase the total energy expenditure following an exercise session.
authors.affiliation: Physical effort Laboratory, Sports Center, Federal University of Santa Catarina, Rua Antonio Edu Vieira, Pantanal, CDS/UFSC, Florianopolis 88040-970, SC, Brazil, Brazil. Electronic address: nascimentopc84@hotmail.com.
authors.forename: Paulo Cesar
authors.initials: PC
authors.lastname: do Nascimento Salvador
authors.affiliation: Human Performance Research Group, Center of Health and Sport Sciences, Santa Catarina State University, Rua Pascoal Simone, 358, Coqueiros, Florianopolis CEP: 88080-350, SC, Brazil, Brazil. Electronic address: deaguiar.rafael@hotmail.com.
authors.forename: Rafael Alves
authors.initials: RA
authors.lastname: de Aguiar
authors.affiliation: Physical effort Laboratory, Sports Center, Federal University of Santa Catarina, Rua Antonio Edu Vieira, Pantanal, CDS/UFSC, Florianopolis 88040-970, SC, Brazil, Brazil. Electronic address: anderson.santeixeira@gmail.com.
authors.forename: Anderson Santiago
authors.initials: AS
authors.lastname: Teixeira
authors.affiliation: Physical effort Laboratory, Sports Center, Federal University of Santa Catarina, Rua Antonio Edu Vieira, Pantanal, CDS/UFSC, Florianopolis 88040-970, SC, Brazil, Brazil. Electronic address: kristophersouza@yahoo.com.br.
authors.forename: Kristopher Mendes de
authors.initials: KM
authors.lastname: Souza
authors.affiliation: Physical effort Laboratory, Sports Center, Federal University of Santa Catarina, Rua Antonio Edu Vieira, Pantanal, CDS/UFSC, Florianopolis 88040-970, SC, Brazil, Brazil. Electronic address: tridantas@hotmail.com.
authors.forename: Ricardo Dantas
authors.initials: RD
authors.lastname: de Lucas
authors.affiliation: Human Performance Laboratory, UNESP, Avenida 24 A, 1515, Bela Vista, Rio Claro CEP: 13506-900, SP, Brazil, Brazil. Electronic address: bdenadai@rc.unesp.br.
authors.forename: Benedito Sérgio
authors.initials: BS
authors.lastname: Denadai
authors.affiliation: Physical effort Laboratory, Sports Center, Federal University of Santa Catarina, Rua Antonio Edu Vieira, Pantanal, CDS/UFSC, Florianopolis 88040-970, SC, Brazil, Brazil. Electronic address: luiz.guilherme@ufsc.br.
authors.forename: Luiz Guilherme Antonacci
authors.initials: LG
authors.lastname: Guglielmo
mesh_terms: D001341:Autonomic Nervous System / Q000502:physiology; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology*; D006706:Homeostasis / Q000502:physiology; D006801:Humans; D007700:Kinetics; D008297:Male; D010101:Oxygen Consumption / Q000502:physiology*; D020127:Recovery of Function / Q000502:physiology; D012420:Running / Q000502:physiology; D013312:Stress, Physiological / Q000502:physiology; D055815:Young Adult
keywords: Autonomic function; Homeostasis; Recovery; Repeated running sprints