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Effort Index as a Novel Variable for Monitoring the Level of Effort During Resistance Exercises

2018Journal article Restricted access
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dc.contributor.authorRodríguez-Rosell, David
dc.contributor.authorYáñez-García, Juan M.
dc.contributor.authorTorres-Torrelo, Julio
dc.contributor.authorMora-Custodio, Ricardo
dc.contributor.authorMarques, Mário C.
dc.contributor.authorGonzález-Badillo, Juan J.
dc.date.accessioned2020-03-02T12:16:06Z
dc.date.available2020-03-02T12:16:06Z
dc.date.issued2018
dc.description.abstractThis study aimed to analyze the acute mechanical and metabolic response to resistance exercise protocols (REPs) defined by 2 variables: the first repetition's mean velocity and the percentage of velocity loss (%VL) over the set. The product of these 2 variables was termed the effort index (EI) and was used as an indicator of the degree of fatigue induced during each REP. Twenty-one resistance-trained men (11 in full squat [SQ] and 10 in bench press [BP]) performed 16 REPs separated by 72 hours. Relative loads used (50, 60, 70, and 80% 1-repetition maximum) were determined from the load-velocity relationship for the SQ and BP, whereas volume was objectively determined using the %VL attained over the set (10, 20, 30, and 45% for SQ, and 15, 25, 40, and 55% for BP). Lactate concentration and velocity against the load that elicited a ∼1.00 m·s (V1 m·s load) were measured before and after each REP. Post-exercise velocity with the V1 m·s load and lactate concentration were significantly different (P < 0.01-0.001) from pre-exercise after all REPs. A very close relationship was found between the proposed EI and %VL with the V1 m·s load (r = 0.92-0.98) and post-exercise lactate concentration (r = 0.91-0.95) in both exercises. The correlations between this new index and fatigue indicators such as VL allow us to gain further insight into the actual degree of effort incurred during resistance exercise. In addition to being a valuable addition for training monitoring, the proposed EI could also be used as an independent variable in training studies by equalizing the effort between different interventions.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1519/JSC.0000000000002629pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/9655
dc.language.isoengpt_PT
dc.subjectAdolescentpt_PT
dc.subjectAdultpt_PT
dc.subjectCross-Sectional Studiespt_PT
dc.subjectExercise Testpt_PT
dc.subjectHumanspt_PT
dc.subjectLactic Acidpt_PT
dc.subjectMalept_PT
dc.subjectMuscle Fatiguept_PT
dc.subjectResistance Trainingpt_PT
dc.subjectYoung Adultpt_PT
dc.titleEffort Index as a Novel Variable for Monitoring the Level of Effort During Resistance Exercisespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage2153pt_PT
oaire.citation.issue8pt_PT
oaire.citation.startPage2139pt_PT
oaire.citation.titleJournal of Strength and Conditioning Researchpt_PT
oaire.citation.volume32pt_PT
person.familyNameMARQUES
person.givenNameMÁRIO
person.identifier.ciencia-idEA13-7532-0A6D
person.identifier.orcid0000-0002-5812-1580
person.identifier.scopus-author-id24773599000
rcaap.embargofctCopyright cedido à editora no momento da publicaçãopt_PT
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationb410e6a7-5e97-4946-9f86-260182107ffb
relation.isAuthorOfPublication.latestForDiscoveryb410e6a7-5e97-4946-9f86-260182107ffb

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