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Study note

Carbohydrate-gel supplementation and endurance performance during intermittent high-intensity shuttle running.

Updated Oct 17, 2026

On this page
Human researchInternational journal of sport nutrition and exercise metabolism2007Read the source on PubMed

What the study found

The carbohydrate-gel condition increased blood glucose at several measurements and extended the final run-to-exhaustion test compared with placebo.

Participants and protocol

Seven male soccer players completed prolonged intermittent shuttle running in two trials, consuming gel or placebo with water before and during exercise.

What this gel study does and does not answer

This randomized trial tested carbohydrate gel during prolonged intermittent high-intensity shuttle running, then measured a run-to-exhaustion outcome. It is not a marathon, triathlon or 100K field trial, and time to exhaustion is not the same as a finish-time benefit.

The practical use is narrower: carbohydrate form and timing can be tested during a session that resembles the athlete's expected duration and intensity. Rehearse one familiar product, record dose, fluid, gastrointestinal response and the rest of that day's intake, and change one variable at a time.

Read the complete methods in the PubMed record before copying the protocol. A positive group result does not establish tolerance, medical suitability or the right amount for an individual. Avoid new gels, large dose jumps or untested caffeine combinations on race day.

What this cannot establish

A short exhaustion test after soccer-style running is not a marathon time trial. The findings do not establish one ideal gel schedule or guarantee gastrointestinal tolerance.

Publication details
Record
PubMed 18046054
Publication types
Randomized Controlled Trial
Indexed subjects
Carbohydrates · Blood Glucose · Gels · Cross-Over Studies · Oxygen Consumption
Source record checked
2026-10-18

Publication type and subject indexing describe the record; they are not a quality grade or proof of a benefit. An abstract does not replace a review of the full methods and results.

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