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Inter-individual responses to sprint interval training, a pilot study investigating interactions with the sirtuin
Stuart R Gray1, Tom P Aird2, Andrew J Farquharson2
1a Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, G12 8TA, UK.
Sprint interval training (SIT) improves body composition and blood glucose control by influencing the sirtuin/NAD system. Individual responses vary, particularly between sexes, highlighting personalized health approaches.
Area of Science:
- Exercise Physiology
- Metabolic Health
- Molecular Biology
Background:
- Sprint interval training (SIT) shows promise for improving blood glucose control.
- Sirtuins and their associated genes are critical regulators of glucose metabolism.
- Understanding the sirtuin/NAD system's role in exercise response is crucial for public health.
Purpose of the Study:
- To investigate the relationship between the sirtuin/NAD system and insulin sensitivity after SIT.
- To examine individual variations in metabolic responses to SIT in healthy young adults.
- To explore sex-specific differences in metabolic and molecular adaptations to SIT.
Main Methods:
- 20 healthy young adults (7 female) underwent 4 weeks of SIT.
- Measurements included body mass, fat percentage, and oral glucose tolerance tests.
- Blood gene expression of sirtuins and NAD-related enzymes, plus NAD/NADP levels, were analyzed.
Main Results:
- SIT led to significant reductions in body weight and fat percentage.
- Post-SIT changes were linked to altered lipid profiles, NAD/NADP levels, and sirtuin/NAD system gene regulation (NAMPT, NMNAT1, CD38, ABCA1).
- Metabolic improvements showed considerable inter-individual and sex-specific variations.
Conclusions:
- SIT impacts body composition and the sirtuin/NAD system in healthy young individuals.
- Inter-individual and sex-based differences in sirtuin/NAD system response influence metabolic adaptations to SIT.
- Personalized exercise prescriptions may optimize health benefits from SIT.
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