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Breath hydrogen (H2) response to carbohydrate malabsorption after exercise
The Journal of Laboratory and Clinical Medicine
|July 1, 1983
Summary
Mild exercise after fasting temporarily lowers breath hydrogen (H2) concentration. This exercise significantly alters the breath H2 response to lactulose, impacting sequential testing interpretations.
Area of Science:
- Gastroenterology
- Human Physiology
- Metabolic Research
Background:
- Breath hydrogen (H2) testing is a common diagnostic tool.
- Lactulose is used to assess gastrointestinal transit and absorption.
- The influence of pre-test exercise on breath H2 measurements is not fully understood.
Purpose of the Study:
- To investigate the effect of mild exercise post-fasting on baseline breath H2 levels.
- To determine if exercise impacts the breath H2 response following lactulose ingestion.
Main Methods:
- Ten healthy subjects participated in the study.
- Breath H2 concentrations were measured before and after mild exercise.
- Breath H2 was also monitored after oral administration of lactulose.
Main Results:
- A significant decrease in breath H2 concentration was observed immediately after exercise (p < 0.0001).
- Breath H2 levels quickly returned to baseline values post-exercise.
- Exercise induced a significant alteration in the overall breath H2 response to lactulose.
Conclusions:
- Mild exercise after an overnight fast transiently affects baseline breath H2.
- Exercise significantly modifies the breath H2 response to lactulose.
- These findings are crucial for interpreting sequential breath H2 tests accurately.