title: High-Intensity Interval Resistance Training (HIRT) influences resting energy expenditure and respiratory ratio in non-dieting individuals.
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 2'30″ 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.
authors.affiliation: Department of Biomedical Sciences, Physiological Laboratory, University of Padova, Padova, Italy. antonio.paoli@unipd.it
authors.forename: Antonio
authors.initials: A
authors.lastname: Paoli
authors.forename: Tatiana
authors.initials: T
authors.lastname: Moro
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Marcolin
authors.forename: Marco
authors.initials: M
authors.lastname: Neri
authors.forename: Antonino
authors.initials: A
authors.lastname: Bianco
authors.forename: Antonio
authors.initials: A
authors.lastname: Palma
authors.forename: Keith
authors.initials: K
authors.lastname: Grimaldi
mesh_terms: D000328:Adult; D004032:Diet; D004734:Energy Metabolism / Q000502:physiology*; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D055070:Resistance Training; D012119:Respiration; D012146:Rest / Q000502:physiology*
chemical_list: D019344:Lactic Acid