Glucose:Fructose Versus Glucose Carbohydrate Ingestion and Endurance Performance

The primary objective is to show that multiple transportable carbohydrate ingestion is more effective in improving endurance performance compared to single transportable carbohydrate ingestion.

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Key information

Conditions

Healthy

Age range

18 year–60 year

Sex eligibility

Male

Study type

Interventional

Phase

Not applicable

Primary location

Massey University

Wellington, New Zealand

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Mixture of glucose and fructose

Dietary Supplement

Glucose

Dietary Supplement

Primary outcomes

TIME to finish a long distance triathlon

Time frame: Total time recorded at the end of the race 1 and race 2

Sponsors and collaborators

Lead sponsor

Société des Produits Nestlé (SPN)

Industry

Registry information

Important dates

Study start: 2013
Primary completion: 2014
Study completion: 2014
First posted: Jan 9, 2014
Registry last updated: Jul 9, 2014

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed