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ORIGINAL ARTICLE  EXERCISE PHYSIOLOGY AND BIOMECHANICS 

The Journal of Sports Medicine and Physical Fitness 2022 September;62(9):1153-61

DOI: 10.23736/S0022-4707.21.12342-4

Copyright © 2021 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of a short-term whole-body high-intensity interval training on fitness, morphological, and functional parameters in untrained individuals

Alexandre L. EVANGELISTA 1, Felipe A. BRIGATTO 2 , Júlio B. DE CAMARGO 2, Tiago V. BRAZ 2, Danilo S. BOCALINI 3, Cauê V. TEIXEIRA 4, Marcos R. PAUNKSNIS 5, Bruna M. BARROS 5, Letícia M. SANTOS 5, Luiz C. CARNEVALI JUNIOR 6

1 Department Physical Education, Nove de Julho University, São Paulo, Brazil; 2 Human Performance Research Laboratory, Methodist University of Piracicaba, Piracicaba, Brazil; 3 Laboratory of Experimental Physiology and Biochemistry, Center of Physical Education and Sport, Federal University of Espírito Santo, Vitoria, Brazil; 4 Federal University of São Paulo, São Paulo, Brazil; 5 Nove de Julho University, São Paulo, Brazil; 6 Department of Physical Education, Ítalo Brasileiro University Center, São Paulo, Brazil



BACKGROUND: High-intensity interval training protocols using the body weight (WB-HIIT) as resistance could be an interesting and inexpensive alternative due to the absence of equipment required (low cost) and the possibility to be performed in a wide range of locations. Therefore, the purpose of the present study was to analyze the effects of a short-term WB-HIIT protocol on muscle thickness (MT), muscular endurance (ME), one maximum repetition test (1RM), and maximum oxygen uptake (VO2max) of untrained individuals.
METHODS: Fifty healthy men (28.2±6.7 years, 77.5±26.2 kg, 171±10 cm, 23.2±8.2% Fat) were randomized into WB-HIIT (N.=25) or control (CON, N.=25) group. The WB-HIIT performed 9 exercises (40-second stimulus in all out intensity/ 20-second of passive recovery) divided into 3 blocks with 2 sets each for 6 weeks (three times a week).
RESULTS: Only WB-HIIT resulted in a significant increase in MT, ME, 1RM, and VO2max (all P<0.05) outcomes and were significantly greater compared to CON (all P<0.05).
CONCLUSIONS: Our results demonstrate that a WB-HIIT program can be a time-efficient strategy to promote changes on fitness, morphological and functional parameters in previously untrained sedentary individuals.


KEY WORDS: Exercise; Muscles; Hypertrophy; Muscle strength

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