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dc.contributor.advisorRamírez-Vélez, Robinson 
dc.contributor.advisorCorrea Bautista, Jorge Enrique 
dc.creatorVelasco-Orjuela, Gina P 
dc.creatorDomínguez-Sanchéz, Maria A 
dc.creatorCorrea Bautista, Jorge Enrique 
dc.creatorTriana Reina, Héctor Reynaldo 
dc.creatorGarcía-Hermoso, Antonio 
dc.creatorPeña-Ibagon, Jhonatan C 
dc.creatorIzquierdo, Mikel 
dc.creatorCadore, Eduardo 
dc.creatorHackney, Anthony C 
dc.creatorRamírez-Vélez, Robinson 
dc.date.accessioned2018-05-07T14:32:39Z
dc.date.available2018-05-07T14:32:39Z
dc.date.created2018-03-23
dc.date.issued2018
dc.identifier.urihttp://repository.urosario.edu.co/handle/10336/17968
dc.description.abstractThe purpose of this study was to compare the hormonal responses to one session of high-intensity interval training (HIIT, 4×4 min intervals at 85–95% maximum heart rate [HRmax], interspersed with 4 min of recovery at 75–85% HRmax), resistance training (RT at 50-70% of one repetition maximum 12-15 repetitions per set with 60s of recovery) or both (HIIT+RT) exercise protocol in a cohort of physical inactivity, overweight adults (age 18–30 years old). Randomized, parallel-group clinical trial among fifty-one men (23.6±3.5 yr; 83.5±7.8 kg; 28.0±1.9 kg/m2), physical inactivity (i.e. <150 min of moderate-intensity exercise per week for greater than 6 months), with abdominal obesity (waist circumference ≥ 90 cm) or body mass index ≥ 25 and ≤ 30 kg/m2 were randomized to the following 4 groups: high-intensity interval training (n=14), resistance training (n=12), combined high- intensity interval and resistance training (n=13), or non-exercising control (n=12). Cortisol, total- and free-testosterone and total-testosterone/cortisol-ratio (T/C) assessments (all in serum) were determined before (pre) and 1-min post-exercise for each protocol session. Decreases in cortisol levels were −57.08 (95%CI, −75,58 to −38,58; P=0.001; ɳ 2=0.61) and −37.65 (95%CI, −54,36 to −20,93; P=0.001; ɳ 2=0.51) in the HIIT and control group, respectively. Increases in T/C ratio were 0.022 (95%CI, 0.012 to 0.031; P=0.001; ɳ 2=0.49) and 0.015 (95%CI, 0.004 to 0.025; P=0.007; ɳ 2=0.29) in the HIIT and control group, respectively. In per-protocol analyses revealed significant change in cortisol levels [interaction effect F(7.777), ɳ 2=0.33] and T/C ratio [interaction effect F(5.298), ɳ 2=0.25] between groups over time. The present data indicate a HIIT reduced cortisol and increased total- testosterone/cortisol-ratio levels significantly in physical inactive adults. Further study is required to determine the biological importance of these changes in hormonal responses in overweight men.
dc.format.mimetypeapplication/pdf
dc.language.isospa
dc.rightsAtribución-NoComercial-SinDerivadas 2.5 Colombia
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/2.5/co/
dc.sourceinstname:Universidad del Rosario
dc.sourcereponame:Repositorio Institucional EdocUR
dc.subjectBlood hormones
dc.subjectExercise
dc.subjectOverweight
dc.subject.ddcEnfermedades 
dc.titleAcute effects of high-intensity interval, resistance or combined exercise protocols on testosterone – cortisol responses in inactive overweight individuals
dc.typemasterThesis
dc.publisherUniversidad del Rosario
dc.creator.degreeMagíster en actividad física y salud
dc.publisher.programMaestría en Actividad Física y Salud
dc.publisher.departmentFacultad de medicina
dc.rights.accesRightsinfo:eu-repo/semantics/openAccess
dc.subject.decsObesidad Abdominal
dc.subject.decsAdulto
dc.subject.decsEjercicio
dc.type.spaTesis de maestría
dc.rights.accesoAbierto (Texto Completo)
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersion
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Atribución-NoComercial-SinDerivadas 2.5 Colombia
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