PMID- 31906976
OWN - NLM
STAT- MEDLINE
DCOM- 20200819
LR  - 20200819
IS  - 1550-2783 (Electronic)
IS  - 1550-2783 (Linking)
VI  - 17
IP  - 1
DP  - 2020 Jan 6
TI  - Carbohydrate supplementation and psychophysiological responses during moderate 
      exercise in hypoxia.
PG  - 3
LID - 10.1186/s12970-019-0331-6 [doi]
LID - 3
AB  - BACKGROUND: Rating of Perceived Exertion (RPE) is a subjective scale to monitor 
      overload and fatigue during exercise. Hypoxia may worsen the perception of 
      fatigue, compromising the self-reported perception of effort and increasing RPE. 
      The objective was to evaluate the effects of carbohydrate (CHO) supplementation 
      on RPE during exercise in hypoxia simulating 4200 m. METHODS: Eight male 
      physically active volunteers performed two exercises at 50% VO(2peak) and 1% 
      slope: exercise in hypoxia + placebo or exercise in hypoxia + CHO (6% 
      maltodextrin) with supplementation at 20, 40, and 60 min during exercise. Oxygen 
      Saturation (SaO(2)%) was assessed at baseline and after exercise, while RPE and 
      HR were measured each 10 min during the trial. RESULTS: SaO(2)% decreased after 
      exercise in both conditions of hypoxia compared to rest. The RPE did not differ 
      between groups. However, the RPE increased in hypoxia after 20 min of exercise in 
      relation to 10 min. The Area Under the Curve (AUC) of RPE was lower in hypoxia + 
      CHO compared to hypoxia. The AUC of the HR/RPE ratio in the hypoxia + CHO group 
      was higher in relation to hypoxia. CONCLUSIONS: Our results indicate that CHO 
      supplementation does not change RPE induced by 60 min of exercise at 50% 
      VO(2peak) in hypoxia equivalent to 4200 m at the different times analyzed. 
      However, in hypoxia + CHO the (AUC)-60 min of total RPE decreased during 
      exercise, while the heart rate/RPE ratio improved, indicating lower RPE in the 
      hypoxic environment.
FAU - Tavares-Silva, E
AU  - Tavares-Silva E
AD  - Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, 
      Brazil.
FAU - Donatto, F F
AU  - Donatto FF
AD  - Department of Bioscience, Universidade Federal de Sao Paulo, Rua Silva Jardim, 
      136 - Vila Mathias, Santos, SP, 11015-020, Brazil.
FAU - Medeiros, R M V
AU  - Medeiros RMV
AD  - Centro Universitario do Rio Grande do Norte (UNI-RN), Natal, Brazil.
FAU - Santos, S A
AU  - Santos SA
AD  - Department of Bioscience, Universidade Federal de Sao Paulo, Rua Silva Jardim, 
      136 - Vila Mathias, Santos, SP, 11015-020, Brazil.
FAU - Caris, A V
AU  - Caris AV
AD  - Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, 
      Brazil.
FAU - Thomatieli-Santos, R V
AU  - Thomatieli-Santos RV
AD  - Department of Psychobiology, Universidade Federal de Sao Paulo, Sao Paulo, 
      Brazil. ronaldo.thomatieli@unifesp.br.
AD  - Department of Bioscience, Universidade Federal de Sao Paulo, Rua Silva Jardim, 
      136 - Vila Mathias, Santos, SP, 11015-020, Brazil. ronaldo.thomatieli@unifesp.br.
LA  - eng
GR  - 2017/26563-2/Fundacao de Amparo a Pesquisa do Estado de Sao Paulo/
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20200106
PL  - United States
TA  - J Int Soc Sports Nutr
JT  - Journal of the International Society of Sports Nutrition
JID - 101234168
RN  - 0 (Carbohydrates)
RN  - 0 (Polysaccharides)
RN  - 7CVR7L4A2D (maltodextrin)
SB  - IM
MH  - Adult
MH  - Carbohydrates/*pharmacology
MH  - Cross-Over Studies
MH  - *Dietary Supplements
MH  - Double-Blind Method
MH  - *Exercise
MH  - Humans
MH  - *Hypoxia
MH  - Male
MH  - Oxygen Consumption
MH  - Physical Exertion
MH  - Polysaccharides/*pharmacology
MH  - Young Adult
PMC - PMC6945642
OTO - NOTNLM
OT  - Carbohydrate
OT  - HR/RPE ratio
OT  - Hypoxia
OT  - Physical exercise
OT  - RPE
OT  - Supplementation
COIS- The authors declare that they have no competing interests.
EDAT- 2020/01/08 06:00
MHDA- 2020/08/20 06:00
PMCR- 2020/01/06
CRDT- 2020/01/08 06:00
PHST- 2019/08/01 00:00 [received]
PHST- 2019/12/12 00:00 [accepted]
PHST- 2020/01/08 06:00 [entrez]
PHST- 2020/01/08 06:00 [pubmed]
PHST- 2020/08/20 06:00 [medline]
PHST- 2020/01/06 00:00 [pmc-release]
AID - 10.1186/s12970-019-0331-6 [pii]
AID - 331 [pii]
AID - 10.1186/s12970-019-0331-6 [doi]
PST - epublish
SO  - J Int Soc Sports Nutr. 2020 Jan 6;17(1):3. doi: 10.1186/s12970-019-0331-6.