PMID- 34637645
OWN - NLM
STAT- MEDLINE
DCOM- 20220218
LR  - 20220218
IS  - 1715-5320 (Electronic)
IS  - 1715-5312 (Linking)
VI  - 47
IP  - 2
DP  - 2022 Feb
TI  - Inclusion of sprints during moderate-intensity continuous exercise enhances 
      post-exercise fat oxidation in young males.
PG  - 165-172
LID - 10.1139/apnm-2021-0383 [doi]
AB  - To assess the physiological demands of including high-intensity efforts during 
      continuous exercise, we designed a randomized crossover study, in which 12 
      physically active young males executed 3 different exercises in random order: 
      FATmax - continuous exercise at the highest fat oxidation zone; 2min-130% - 
      FATmax interspersed by a 2-minute bout at 130% of the maximal oxygen uptake 
      associated intensity (iV̇O(2max)); and 20s:10s-170% - FATmax interspersed by four 
      20-s bouts at 170%iV̇O(2max) interpolated by 10s of passive recovery. We measured 
      oxygen uptake (V̇O(2)), blood lactate concentration ([LAC]), respiratory exchange 
      rate (RER), and fat and carbohydrate (CHO) oxidation. For statistical analyses, 
      repeated-measures ANOVA was applied. Although no differences were found for 
      average V̇O(2) or carbohydrate oxidation rate, the post-exercise fat oxidation 
      rate was 37.5% and 50% higher during the 2min-130% and 20s:10s-170% protocols, 
      respectively, compared with the FATmax protocol, which also presented lower 
      values of RER during exercise compared with 2min-130% and 20s:10s-170% (p < 0.001 
      in both), and higher values post-exercise (p = 0.04 and p = 0.002, respectively). 
      [LAC] was higher during exercise when high-intensity bouts were applied (p < 
      0.001 for both) and was higher at post-exercise during the intermittent bouts 
      compared with FATmax (p = 0.016). The inclusion of high-intensity efforts during 
      moderate-intensity continuous exercise promoted higher physiological demands and 
      post-exercise fat oxidation. Novelty: The inclusion of 2-minute efforts modifies 
      continuous exercise demands. Maximal efforts can increase post-exercise fat 
      oxidation. 2-minute maximal efforts, continuous or intermittent, presents similar 
      demands.
FAU - Mello-Silva, Bruno Nicanor
AU  - Mello-Silva BN
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
FAU - Protzen, Gabriel Volz
AU  - Protzen GV
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
FAU - Del Vecchio, Fabricio Boscolo
AU  - Del Vecchio FB
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
AD  - Physical Education College, Federal University of Pelotas, 625 Luis de Camoes 
      St., Pelotas, RS, Brazil.
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20211012
PL  - Canada
TA  - Appl Physiol Nutr Metab
JT  - Applied physiology, nutrition, and metabolism = Physiologie appliquee, nutrition 
      et metabolisme
JID - 101264333
RN  - 33X04XA5AT (Lactic Acid)
SB  - IM
MH  - Adipose Tissue/metabolism
MH  - Cross-Over Studies
MH  - Exercise/*physiology
MH  - High-Intensity Interval Training/*methods
MH  - Humans
MH  - Lactic Acid/blood
MH  - Male
MH  - *Oxidation-Reduction
MH  - Oxygen Consumption/physiology
MH  - Respiratory Rate
MH  - Young Adult
OTO - NOTNLM
OT  - HIIT
OT  - calorimetrie indirecte
OT  - energy substrates
OT  - indirect calorimetry
OT  - perte de poids
OT  - substrats energetiques
OT  - weight loss
EDAT- 2021/10/13 06:00
MHDA- 2022/02/19 06:00
CRDT- 2021/10/12 20:09
PHST- 2021/10/13 06:00 [pubmed]
PHST- 2022/02/19 06:00 [medline]
PHST- 2021/10/12 20:09 [entrez]
AID - 10.1139/apnm-2021-0383 [doi]
PST - ppublish
SO  - Appl Physiol Nutr Metab. 2022 Feb;47(2):165-172. doi: 10.1139/apnm-2021-0383. 
      Epub 2021 Oct 12.