The Impact of sprint interval training with or without weight loss on substrate oxidation in adults
Mini-Oral Presentation C2.13
DOI:
https://doi.org/10.14288/hfjc.v14i3.767Keywords:
Metabolic Flexibility, Interval Training, Substrate UsageAbstract
Background: Endurance exercise training and weight loss (WL) has been associated with changes in fat oxidation (FO). However, there is limited evidence investigating the impact of sprint interval training (SIT) induced WL on FO in adults. Purpose: Investigate the impact of 4-week SIT with or without WL on FO at rest and during submaximal bout of exercise in adults. Methods: Thirty-four adults aged 19 to 60 years took part in 4-week SIT consisting of repeated 30-second Wingates separated by four minutes of active recovery three times per week. Respiratory exchange ratio (RER) was measured with indirect calorimetry (VCO2/VO2), while FO (g/min) was estimated using the formula FO=1.695*VO2-1.701*VCO2. Outcome measures were quantified at rest and during submaximal exercise at baseline and post-intervention. Participants were classified to a WL group (weight change < 0kg) or a non-WL group (weight change ≥ 0 kg). Results: A significant interaction effect was observed between time and WL groups for submaximal RER and FO (all ps<0.05). Submaximal RER (0.96 ± 0.08 to 0.92 ± 0.06; p=0.030) and FO (116.9 ± 223.7 g/min to 248.8 ± 165.3 g/min; p=0.008) were both significantly improved in the WL group and were significantly different from the non-WL group (all ps<0.05). Conclusion: Short-term SIT-induced WL elicited significant improvements in submaximal RER and estimated FO in adults and should be recommended to increase FO in adults. Funding: Diabetes Action Canada, University Research Fund-University of New Brunswick Research Fund, and the Canadian Institute of Health Research
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Copyright (c) 2021 Dawson Nancekievill, Benjamin H. Colpits, Martin Sénéchal
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