Glucose:Fructose Versus Glucose Carbohydrate Ingestion and Endurance Performance

NCT ID: NCT02031783

Last Updated: 2014-07-09

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 74 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2013-11-30
• Study Completion Date: 2014-01-31

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.

Conditions

Healthy

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: DOUBLE

Study Groups

mixture of glucose and fructose

mixture of glucose and fructose

Group Type: EXPERIMENTAL

glucose

Intervention Type: DIETARY_SUPPLEMENT

Glucose

Single glucose

Group Type: ACTIVE_COMPARATOR

Mixture of glucose and fructose

Intervention Type: DIETARY_SUPPLEMENT

Interventions

Mixture of glucose and fructose

Intervention Type: DIETARY_SUPPLEMENT

glucose

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

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

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 60 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Société des Produits Nestlé (SPN)

INDUSTRY

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Locations

Massey University

Wellington, , New Zealand

Countries

New Zealand

References

Rowlands DS, Houltham SD. Multiple-Transportable Carbohydrate Effect on Long-Distance Triathlon Performance. Med Sci Sports Exerc. 2017 Aug;49(8):1734-1744. doi: 10.1249/MSS.0000000000001278.

Reference Type: DERIVED

PMID: 28350714 (View on PubMed)

Other Identifiers

13.09.PER

Identifier Type: -

Identifier Source: org_study_id