Banca de DEFESA: NAYARA ARAUJO SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : NAYARA ARAUJO SILVA
DATE: 28/06/2023
TIME: 09:00
LOCAL: online (https://meet.google.com/nvn-apov-mqx)
TITLE:

Effect of carbohydrate supplementation on carbohydrate and fat oxidation in conditions of hepatic glycogen depletion during physical exercise.

KEY WORDS:

Fasting. Liver glycogen. Glucose. Nutritional supplementation.

PAGES: 65
BIG AREA: Ciências da Saúde
AREA: Nutrição
SUMMARY:

Carbohydrates (CHO) and fat are primary supplements for energy metabolism in humans during prolonged exercise. The majority of oxidized CHO comes from muscle glycogen, and muscle glycogen breakdown increases with exercise intensity and decreases due to its finite nature. With fasting and when aerobic exercise is performed under these conditions, glycogen levels decrease, increasing the use of fat as energy supplements. This dissertation aims to evaluate whether CHO supplementation can influence the use of energy substrates during prolonged exercise in conditions of hepatic glycogen depletion. The dissertation is divided into two chapters, the first consisting of a literature review that discusses the subject and the second, an original article that aimed to investigate the effect of CHO supplementation on CHO and fat feeding in condition of hepatic glycogen depletion during a long-duration cycling event, in which participants (n=7) were allowed a 12-hour overnight fast associated with arm exercise for hepatic glycogen depletion or served a breakfast without performing of arm exercise, followed by constant-load cycling exercise (105 min at 50% VO2max). CHO (8%) or placebo was consumed at rest and every 15 minutes during constant load exercise. Respiratory exchanges were measured every 15 minutes, as well as RPE and HR. CHO supplementation had an effect on the rate of CHO supply, increasing when CHO was supplemented in both the fed and depleted states (p=0.009) and there was a trend between fed state (p=0.058) and CHO supplementation condition. CHO (p=0.052) had an effect on the rate of fat presentation, monitored over time. RPE was lower in the fed state regardless of CHO or placebo supplementation (p<0.05) and HR increased over time (p<0.05).

BANKING MEMBERS:
Externo(a) à Instituição - ADRIANO EDUARDO LIMA DA SILVA - UTFPR
Interno(a) - 1878467 - GUSTAVO GOMES DE ARAUJO
Presidente - 1311365 - THAYS DE ATAIDE E SILVA