The effect of varying forms of carbohydrate on subsequent cycling performance to exhaustion in an active female population
University of Wales Institute Cardiff
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This study aimed to investigate the effects of varying forms of carbohydrate on subsequent cycling performance to exhaustion in an active female population. 7 subjects aged 20-21 years, recruited due to their availability, with a maximal oxygen consumption (VO2 max) 2.62 (+ 0.54) l-min¯¹ took part in this experimental design. Subjects were required to cycle at 55% Wpeak for 25-min, with an increase in intensity to 75% Wpeak until volitional exhaustion on two occasions separated by one week. Each trial was entered following an overnight fast with subjects consuming 2 g per kg of body mass of a liquid carbohydrate (lucozade) 15-min prior to the onset of exercise and solid carbohydrate (pasta) 1.5-hr prior. Results indicated no significant difference in time to exhaustion (p<0.102) despite a 406.4-s mean increased time following the ingestion of liquid carbohydrate. Heart rate (HR) was significantly higher within the liquid trial (p<0.05). Localised rating of perceived exertion (RPEl) was significantly higher than central RPE (RPEc), with RPEl higher at 75% Wpeak than 55% Wpeak phase (p<0.05). VO2 and VCO2 (l-min¯¹) values were similar within both trials. In conclusion varying forms of carbohydrate had no effect on subsequent cycling performance with regards to time to exhaustion. Therefore, the form of carbohydrate (solid vs. liquid) requires further investigation to examine which form is best for performance within an active female population.
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