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Critical load: a novel approach to determining a sustainable intensity during resistance exercise.
Arakelian, Vivian M; Mendes, Renata G; Trimer, Renata; Rossi Caruso, Flavia C; de Sousa, Nuno M; Borges, Vanessa C; do Valle Gomes Gatto, Camila; Baldissera, Vilmar; Arena, Ross; Borghi-Silva, Audrey.
Afiliação
  • Arakelian VM; Cardiopulmonary Physiotherapy Laboratory, Department of Physiotherapy, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Mendes RG; University of São Paulo, Sao Carlos, Brazil.
  • Trimer R; Cardiopulmonary Physiotherapy Laboratory, Department of Physiotherapy, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Rossi Caruso FC; Cardiopulmonary Physiotherapy Laboratory, Department of Physiotherapy, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • de Sousa NM; Cardiopulmonary Physiotherapy Laboratory, Department of Physiotherapy, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Borges VC; Laboratory of Exercise Physiology, Department of Physiological Science, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • do Valle Gomes Gatto C; Laboratory of Exercise Physiology, Department of Physiological Science, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Baldissera V; Laboratory of Exercise Physiology, Department of Physiological Science, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Arena R; Laboratory of Exercise Physiology, Department of Physiological Science, Federal University of Sao Carlos, UFSCar, Sao Carlos, Brazil.
  • Borghi-Silva A; Department of Physical Therapy and Integrative Physiology Laboratory, College of Applied Health Sciences, University of Illinois, Chicago, IL, USA.
J Sports Med Phys Fitness ; 57(5): 556-564, 2017 May.
Article em En | MEDLINE | ID: mdl-26868642
BACKGROUND: A hyperbolic function as well as a linear relationship between power output and time to exhaustion (Tlim) has been consistently observed during dynamic non-resistive exercises. However, little is known about its concept to resistance exercises (RE), which could be defined as critical load (CL). This study aimed to verify the existence of CL during dynamic RE and to verify the number of workbouts necessary to determine the optimal modeling to achieve it. METHODS: Fifteen healthy men (23±2.5 yrs) completed 1 repetition maximum test (1RM) on a leg press and 3 (60%, 75% and 90% of 1RM) or 4 (+ 30% of 1RM) workbouts protocols to obtain the CL by hyperbolic and linear regression models between Tlim and load performed. Blood lactate and leg fatigue were also measured. RESULTS: CL was obtained during RE and 3 workbouts protocol estimate it at 53% while 4 tests at 38% of 1 RM. However, based on coefficients of determination, 3 protocols provided a better fit than the 4-parameter model, respectively (R2>0.95 vs. >0.77). Moreover, all intensities increased blood lactate and leg fatigue, however, when corrected by Tlim, were significantly lower at CL. CONCLUSIONS: It was possible to determinate CL during dynamic lower limbs RE and that 3 exhaustive workbouts can be used to better estimate the CL, constituting a new concept of determining this threshold during dynamic RE and reducing the physically demanding nature of the protocol. These findings may have important applications for functional performance evaluation and prescription of RE programs.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Limiar Anaeróbio / Tolerância ao Exercício / Músculo Esquelético / Fadiga Muscular / Força Muscular / Treinamento Resistido Tipo de estudo: Prognostic_studies Limite: Adult / Humans / Male Idioma: En Revista: J Sports Med Phys Fitness Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Itália
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Limiar Anaeróbio / Tolerância ao Exercício / Músculo Esquelético / Fadiga Muscular / Força Muscular / Treinamento Resistido Tipo de estudo: Prognostic_studies Limite: Adult / Humans / Male Idioma: En Revista: J Sports Med Phys Fitness Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Itália