Maple Products and Exercise Performance

Summary

The purpose of this study is to compare the acute metabolic responses and time-trial performance following the ingestion of carbohydrate solutions containing either maple syrup, maple sap, corn syrup, a commercial sport drink or water.

Conditions

• Carbohydrate Ingestion
• Fuel Selection
• Athletic Performance

Interventions

DIETARY_SUPPLEMENT

Solution ingestion

Subjects will be required to ingest 2 litres of the experimental solution, spread over the 2 hours of exercise. A first ingestion of 572 mL of solution will be made at rest, 30 minutes before starting exercise, and 286 mL will be ingested immediately before the start of exercise and every 30 minutes during the exercise period.

BEHAVIORAL

Constant load cycling

Subjects will be required to perform 2 hours of cycling exercise at a power output eliciting 60% of VO2max.

PROCEDURE

Expired gas sampling

Subjects will be asked, twice, to provide a forced expiration into a 10 mL plastic tube in order to collect a sample expired gases. This procedure will be done immediately before blood sampling and ingestion of the solution, every 30 minutes.

PROCEDURE

Indirect respiratory calorimetry

A mouthpiece and nose plug will be placed on the subject and expired gases will be analyzed by a metabolic cart during 3 minutes. This procedure will be done immediately before expired gas collection, blood sampling and ingestion of the solution, every 30 minutes.

OTHER

Palatability

Subjects will be asked to fill out a short form on the palatability of the solution ingestion, after ingesting the first solution and at the end of exercise, after ingestion the last solution.

OTHER

Gastrointestinal

At the end of the time trial, subjects will be asked to fill out a short form on gastrointestinal issues they might have had during experimentation.

PROCEDURE

Blood sampling

A catheter will be inserted in an antecubital vein and a saline solution will be continuously perfused to maintain the vessel open. 15 mL of blood will be collected every 30 minutes, immediately before ingesting the solution.

BEHAVIORAL

Time trial

Subjects will be required to complete a simulated 20-km time trial on the cycle ergometer set in linear mode (where resistance is proportional to pedalling cadence), starting at 70% of the peak power output for the cadence spontaneously adopted by the subject during 2 hours of exercise.

Sponsors & Collaborators

• Fédération des producteurs acéricoles du Québec

  collaborator UNKNOWN

• Université de Montréal

  lead OTHER

Principal Investigators

• Jonathan Tremblay, Ph.D. · Université de Montréal

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

DOUBLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

45 Years

Sex

MALE

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2016-07-11

Primary Completion

2017-12-22

Completion

2018-03-30

Countries

• Canada

Study Locations