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High-Intensity Interval Resistance Training (HIRT) influences resting energy expenditure and respiratory ratio in non-dieting individuals

Antonio Paoli1*, Tatiana Moro1, Giuseppe Marcolin1, Marco Neri2, Antonino Bianco3, Antonio Palma3 and Keith Grimaldi4

Author Affiliations

1 Department of Biomedical Sciences, Physiological Laboratory, University of Padova, via Marzolo 3, Padova 35131, Italy

2 Italian Fitness Federation, Ravenna, Italy

3 Department of Sports and Exercise Science (DISMOT), University of Palermo, Palermo, Italy

4 Biomedical Engineering Laboratory, Institute of Communication and Computer Systems, National Technical University of Athens, Athens, Greece

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Journal of Translational Medicine 2012, 10:237  doi:10.1186/1479-5876-10-237

Published: 24 November 2012

Abstract

Background

The benefits of exercise are well established but one major barrier for many is time. It has been proposed that short period resistance training (RT) could play a role in weight control by increasing resting energy expenditure (REE) but the effects of different kinds of RT has not been widely reported.

Methods

We tested the acute effects of high-intensity interval resistance training (HIRT) vs. traditional resistance training (TT) on REE and respiratory ratio (RR) at 22 hours post-exercise. In two separate sessions, seventeen trained males carried out HIRT and TT protocols. The HIRT technique consists of: 6 repetitions, 20 seconds rest, 2/3 repetitions, 20 secs rest, 2/3 repetitions with 230″ rest between sets, three exercises for a total of 7 sets. TT consisted of eight exercises of 4 sets of 8–12 repetitions with one/two minutes rest with a total amount of 32 sets. We measured basal REE and RR (TT0 and HIRT0) and 22 hours after the training session (TT22 and HIRT22).

Results

HIRT showed a greater significant increase (p < 0.001) in REE at 22 hours compared to TT (HIRT22 2362 ± 118 Kcal/d vs TT22 1999 ± 88 Kcal/d). RR at HIRT22 was significantly lower (0.798 ± 0.010) compared to both HIRT0 (0.827 ± 0.006) and TT22 (0.822 ± 0.008).

Conclusions

Our data suggest that shorter HIRT sessions may increase REE after exercise to a greater extent than TT and may reduce RR hence improving fat oxidation. The shorter exercise time commitment may help to reduce one major barrier to exercise.

Keywords:
Resistance training; Resting energy expenditure; Interval training; Respiratory ratio