Glucose:Fructose Versus Glucose Carbohydrate Ingestion and Endurance Performance

Not Applicable

Completed

• Conditions: Healthy
• Interventions: Dietary Supplement: Mixture of glucose and fructose; Dietary Supplement: glucose

• Registration Number: NCT02031783
• Lead Sponsor: Société des Produits Nestlé (SPN)

Brief Summary

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

Detailed Description

Not available

Study Timeline

• Study Start: 2013-11
• Study First Submitted: 2013-11-26
• Primary Completion: 2014-01
• Study Completion: 2014-01
• Study First Submitted QC: 2014-01-08
• Study First Posted: 2014-01-09
• Status Verified: 2014-07
• Last Update Submitted: 2014-07-08
• Last Update Posted: 2014-07-09

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 74

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Glucose	Mixture of glucose and fructose	Single glucose
mixture of glucose and fructose	glucose	mixture of glucose and fructose

Primary Outcome Measures

Name	Time	Method
TIME to finish a long distance triathlon	Total time recorded at the end of the race 1 and race 2

Trial Locations

Locations (1)

Massey University; 🇳🇿 Wellington, New Zealand