The Influence Of Fructose Ingestion On Exogenous Carbohydrate Oxidation, Fluid Availability And Exercise Performance

The Effects of Carbohydrate Mouth Rinse Concentration on Cycling Time Trial Performance

“…Participants drank 270ml every 15min of either an artificially sweetened placebo, a drink that delivered 1.7gmin -1 maltodextrin (MD), or a drink delivering 1.1gmin -1 maltodextrin + 0.6gmin -1 fructose (MD + F). Just as Coyle et al (1986) found, blood glucose levels were significantly higher in both CHO trials compared to the placebo (Roberts et al, 2014). During the placebo trial, 8 of the 14 participants were not able to even complete the 60km TT.…”

“…During the placebo trial, 8 of the 14 participants were not able to even complete the 60km TT. Time to completion with MD + F compared to MD was reduced 7.2% and 6.5% compared to the placebo (Roberts et al, 2014). With regards to CHO utilization, total CHO oxidation was greater in both CHO trials compared with the placebo, and during the last 30min of the 2.5h trial, MD + F showed significantly higher rates of total CHO oxidation than MD alone (Roberts et al, 2014).…”

“…Time to completion with MD + F compared to MD was reduced 7.2% and 6.5% compared to the placebo (Roberts et al, 2014). With regards to CHO utilization, total CHO oxidation was greater in both CHO trials compared with the placebo, and during the last 30min of the 2.5h trial, MD + F showed significantly higher rates of total CHO oxidation than MD alone (Roberts et al, 2014). Exogenous CHO oxidation peaked in the final 30 minutes providing 1.45 ± 0.09gmin -1 and 1.07 ± 0.03gmin -1 of the total 2.81 ± 0.06gmin -1 and 2.42gmin -1 for MD + F and MD respectively (Roberts et al, 2014).…”

“…With regards to CHO utilization, total CHO oxidation was greater in both CHO trials compared with the placebo, and during the last 30min of the 2.5h trial, MD + F showed significantly higher rates of total CHO oxidation than MD alone (Roberts et al, 2014). Exogenous CHO oxidation peaked in the final 30 minutes providing 1.45 ± 0.09gmin -1 and 1.07 ± 0.03gmin -1 of the total 2.81 ± 0.06gmin -1 and 2.42gmin -1 for MD + F and MD respectively (Roberts et al, 2014). It should be noted that the total CHO oxidation for the placebo trial during this time was only 2.00gmin -1 (Roberts et al, 2014).…”

“…To determine how a sports drink effects exogenous, total CHO oxidation, and exercise performance, Roberts et al (2014) compared the effects of a maltodextrin containing beverage to a maltodextrin and fructose drink. Participants worked at 50% of maximum power for 2.5h followed immediately by a 60km time trial (TT).…”