Different Signatures of High Cardiorespiratory Capacity Revealed With Metabolomic Profiling in Elite Athletes

Area of Science:

• Exercise Physiology
• Metabolomics
• Biochemistry

Background:

• Cardiorespiratory capacity is crucial for performance and longevity.
• Mechanisms underlying high cardiorespiratory fitness are not fully understood.
• Biochemical signatures may differentiate athletes with varying endurance levels.

Purpose of the Study:

• To investigate biochemical signatures in endurance athletes.
• To utilize high-resolution nontargeted metabolomics.
• To explore metabolic differences related to maximal oxygen consumption (V˙O2max).

Main Methods:

• Studied elite long-distance runners categorized by V˙O2max (low vs. high).
• Collected plasma samples under basal and post-exercise conditions.
• Analyzed samples using high-resolution liquid chromatography-mass spectrometry (LC-MS).

Main Results:

• Identified 167 compounds using an LC-MS metabolomics pipeline.
• Observed clear separation between low and high V˙O2max groups.
• Found significant metabolite variations in lipid, vitamin, amino acid, and purine pathways.

Conclusions:

• Metabolic alterations impact cellular energy, oxidative stress, and nutrient bioavailability.
• Findings provide insights into metabolic adaptations in trained athletes.
• Biochemical profiles correlate with cardiorespiratory fitness levels.