Glucose:Fructose Versus Glucose Carbohydrate Ingestion and Endurance Performance

Inclusion Criteria: * Males aged 18 to 60 years * A history of competitive triathlon performance (≥ 2 years) * Participation in at least four competitive triathlon events within the past 2 years * Be in regular training for triathlon events * A personal best time for a standard ½ Ironman race (1.9 km swim, 90 km cycle, 21.1 km run) in the last year of either: * ≤ 6 h 00 min, for men aged 18-40 years * or ≤6 h 05 min for men aged 40-50 years * or ≤6 h 20 min for men aged 50-60 years * Alternatively, if not competed in ½ Ironman in the last year, at least one standard distance triathlon (1.5 km swim, 40 km cycle, 10 km run) within the last 12 months: * ≤2 h 13 min, for men aged 18-40 years * or ≤2 h 18 min for men aged 40-50 years * or ≤2 h 23 min for men aged 50-60 years * Available to compete in the ½ Ironman events and complete all study requirements * Experienced in using carbohydrate supplementation, as gels, bars, and drinks in training/racing, specifically at rates ≥60-90g/h) * Experience of specific formulations may include both or only multiple and single transportable carbohydrates, thus a full assessment would be made prior to recruitment to ensure balance during randomization and account for any association with the primary outcome * Obtained his (or his legal representative's) informed consent. Exclusion Criteria: * Failure to meet health requirements defined in the Health Questionnaire * Prior known fructose intolerance * Wheat intolerance or other precluding food or packaging-related allergies * An existing injury affecting ability to race to best ability * A chronic injury that may affect ability to complete the races * Unable to carry out performance assessments and questionnaires correctly * Unable to tolerate the treatment during the familiarization sessions * Taking medications thought to interfere with the study outcomes * Currently participating or having participated in another clinical study during the last four weeks prior to the beginning of this study