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Effect of glycemic index on substrate oxidation and food intake

Effect of glycemic index on substrate oxidation and food intake in male cyclists

Status
Completed
Phases
Unknown
Study type
Interventional
Source
ANZCTR
Registry ID
ACTRN12609000522213
Enrollment
15
Registered
2009-07-01
Start date
2008-10-13
Completion date
2008-11-21
Last updated
2024-08-05

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Brief summary

The study will be conducted to test the hypothesis that consuming low glycemic index meals will lead to greater fat oxidation during the postprandial period and subsequent high-intensity exercise than consuming high glycemic index meals will.

Interventions

Two daily high glycemic index meals (breakfast and lunch). Participants are consuming corn flake cereal, whole milk, sports drink (high carbohydrate, water, and electrolytes replenisher), white bread, and margarine for the high glycemic index meal (glycemic index = 79). All Bran cereal, fat-free strawberry yogurt, grape juice, multi-grain bread, margarine, and apple are being provided in the low glycemic index meal (glycemic index = 28).

Sponsors

Universidade Federal de Vicosa
Lead SponsorUniversity

Study design

Allocation
Randomised controlled trial
Primary purpose
Prevention

Eligibility

Sex/Gender
Male
Age
18 Years to 40 Years
Healthy volunteers
Yes

Inclusion criteria

Cyclists should exercise at least three times a week, no alcohol consumption, nonsmokers, no use of medication, not on a therapeutic diet, normal blood pressure, and dietary restraint scores less than 14 based on a restraint scale (Stunkard, & Messick, 1985).

Exclusion criteria

Non-cyclists, alcohol consumers, smokers, on medication, on a therapeutic diet, high blood pressure, and dietary restraint scores higher than 14 based on a restraint scale (Stunkard, & Messick, 1985).

Outcome results

None listed

Source: ANZCTR · Data processed: Feb 4, 2026