Carbohydrate Use During and Following Exercise (CHO-use)

October 16, 2012 updated by: Maastricht University Medical Center

Sucrose as a Preferred Carbohydrate in Sports Nutrition

Carbohydrates are an integral component of sports nutrition. Providing carbohydrate (CHO) during exercise delays the onset of fatigue and improves exercise performance by maintaining high rates of CHO oxidation. Traditionally, glucose, or glucose polymers have been the preferential CHO source found in sports drinks. However, during the intestinal absorption of large amounts of glucose (>1.2 g/min), sodium-dependent glucose transporters (SGLT1) may become fully saturated, potentially limiting the rate of exogenous CHO oxidation. In an effort to evade this limitation, research has suggested using multiple transportable carbohydrates in the composition of sports drinks. Multiple transportable carbohydrates are combinations of simple sugars that use different intestinal transporters during the absorption process. Ingesting multiple transportable carbohydrates may enhance the capacity for total intestinal CHO absorption, leading to an increase in the rate of exogenous CHO oxidation. Our purpose will be to examine the disaccharide sucrose in it's ability to provide exogenous fuel during and following prolonged exercise.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
17

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Netherlands
    • Limburg
      • Maastricht, Limburg, Netherlands, 6200MD
        • Maastricht University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 40 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • Healthy
  • Male
  • 18 - 40 years of age
  • Endurance trained cyclist/triathlete
  • VO2 max ≥ 50 ml/kg/min
  • BMI < 25 kg/m2

Exclusion Criteria:

  • Use of medication
  • Smoking

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Glucose-glucose
Glucose ingestion
Dietary supplement: Carbohydrate ingestion
Various types of carbohydrate ingested during and following exercise
Active Comparator: Glucose-Fructose
glucose-fructose ingestion
Dietary supplement: Carbohydrate ingestion
Various types of carbohydrate ingested during and following exercise
Active Comparator: disaccharide
Disaccharide ingestion
Dietary supplement: Carbohydrate ingestion
Various types of carbohydrate ingested during and following exercise

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 0 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
0 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 0 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
0 min during trials 1-3
Glycogen utilization (Part B)
Time Frame: immediately post exercise (~90min), during trials 4-6

Glycogen utilization measured through a muscle biopsy sample at post (~90 min), 3 and 6 h post exercise.

Part B; trials 4-6.
immediately post exercise (~90min), during trials 4-6
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 30 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
30 min during trials 1-3
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 60 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
60 min during trials 1-3
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 90 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
90 min during trials 1-3
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 120 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
120 min during trials 1-3
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 150 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
150 min during trials 1-3
Exogenous carbohydrate oxidation rate (Part A)
Time Frame: 180 min during trials 1-3
Carbohydrate oxidation as measured by breath samples
180 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 30 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
30 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 60 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
60 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 90 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
90 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 120 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
120 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 150 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
150 min during trials 1-3
Endogenous carbohydrate oxidation (Part A)
Time Frame: 180 min during trials 1-3
endogenous carbohydrate oxidation as measured through breath samples during trials 1-3
180 min during trials 1-3
Glycogen utilization (Part B)
Time Frame: 3 h post exercise during trials 4-6

Glycogen utilization measured through a muscle biopsy sample at post (~90 min), 3 and 6 h post exercise.

Part B; trials 4-6.
3 h post exercise during trials 4-6
Glycogen utilization (Part B)
Time Frame: 6 h post exercise during trials 4-6

Glycogen utilization measured through a muscle biopsy sample at post (~90 min), 3 and 6 h post exercise.

Part B; trials 4-6.
6 h post exercise during trials 4-6

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Indirect calorimetry (Part A)
Time Frame: every 30 min up to 180 min during trials 1-3
Measurements of VO2, VCO2 and RER through indirect calorimetry measured every 30 minutes during trials 1-3
every 30 min up to 180 min during trials 1-3
Plasma glucose
Time Frame: every 30 min up to 180 min during trials 1-6
Plasma glucose measurements
every 30 min up to 180 min during trials 1-6
Plasma insulin
Time Frame: every 30 minutes up to 180 min during trials 1-6
plasma insulin measurements
every 30 minutes up to 180 min during trials 1-6

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Maastricht University Medical Center

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Luc van Loon, Ph.D., Maastricht University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 1, 2012

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
September 1, 2013

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2014

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
October 11, 2012

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 16, 2012

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 18, 2012

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 18, 2012

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 16, 2012

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2012

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 12-3-048

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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