Pre-exercise Ingestion of a Low Glycaemic Index Rice-based Mixed Meal Increases Fat Oxidation and Endurance Running in a Hot-humid Environment

Universiti Sains Malaysia

Status

Completed

Conditions

Healthy

Trained Athletes

Study type

Interventional

Funder types

Other

Identifiers

NCT06544252

USM/JEPeM/19010083

Details and patient eligibility

About

The objective of this research is to determine the influence of low and high glycemic index Malaysian pre-exercise mixed meals on endurance exercise performance in a hot-humid environment. Glycemic index (GI) is a method used to classify CHO-containing foods based on their influence on postprandial blood glucose when compared to the response on blood glucose after ingesting the same amount of CHO from a reference food (glucose or bread). Low GI (LGI) foods are digested and absorbed more slowly as compared to high GI (HGI) foods, resulting in a stable rise in blood glucose levels.

The participants were trained male endurance long-distance runners. On the day of experimental trials, they consumed pre-exercise rice-based mixed meal, either LGI or HGI 3 hours before endurance running exercise. After that, they ran for 45 minutes at constant running speed equivalent to 70% VO2peak, followed by 10km time-trial. The respiratory gases, blood measures, rectal and skin temperature were measured throughout the running test.

Enrollment

12 patients

Sex

Male

Ages

18 to 35 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

healthy
age 18-35 years old
trained (peak oxygen consumption (V̇O2peak): ≥ 55 mL.kg-1.min-1)
training volume (>150 min, ≥ three times per week)
competing at the national level
>2-year of running experience
tier 2 (trained) or tier 3 (highly trained) runners (McKay et al. 2022)
no allergies to any test foods

Exclusion criteria

diagnosis of chronic diseases (i.e. diabetes mellitus, hypertension, cardiovascular disease)
bone, muscle or joint impairments
on medication
currently smoking
use of illicit drugs
use of dietary supplements
on any particular diet