Breath Acetone Measurement-Based Prediction of Exercise-Induced Energy and Substrate Expenditure

Breath Acetone Measurement-Based Prediction of Exercise-Induced Energy and Substrate Expenditure

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The purpose of our study was to validate a newly developed breath acetone (BrAce) analyzer, and to explore if BrAce could predict aerobic exercise-related substrate use.Six healthy men ran on a treadmill at 70% of maximal oxygen consumption (VO2max) for 1 h after two days of a low-carbohydrate diet.BrAce and blood ketone (acetoacetate (ACAC), beta-hydroxybutyrate (BOHB)) levels were measured Changing Table at baseline and at different time points of post-exercise.BrAce values were validated against blood ketones and respiratory exchange ratio My Hero Academia (RER).Our results showed that BrAce was moderately correlated with BOHB (r = 0.

68, p r = 0.37, p r = 0.60, p r = 0.67, p 2max were added to the prediction model in addition to BrAce, R2 values increased up to 0.972 at rest and 0.

917 at 1 h after exercise.In conclusion, BrAce level measurements of our BrAce analyzer reflect blood ketone levels and the device could potentially predict fat oxidation.