Increasing skeletal muscle carnitine content in older individuals increases whole-body fat oxidation during moderate-intensity exercise
Chee C, Shannon CE, Burns A
Published in Aging Cell
Methodology
Controlled intervention in 14 healthy older men (69 years) raising muscle total carnitine content, with fat oxidation and intramyocellular lipid use measured during exercise
Key Findings
Increasing muscle carnitine increased whole-body fat oxidation during moderate-intensity exercise
Conclusions
Carnitine loading can shift substrate use toward fat when muscle carnitine actually rises
Limitations
Small all-male sample; demanding loading protocol
Supplements Studied
Increasing skeletal muscle carnitine content in older individuals increases whole-body fat oxidation during moderate-intensity exercise
Outcomes Measured
Increasing skeletal muscle carnitine content in older individuals increases whole-body fat oxidation during moderate-intensity exercise
Study Details
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