Alkahtani, SA and King, NA and Hills, AP and Byrne, NM, Effect of interval training intensity on fat oxidation, blood lactate and the rate of perceived exertion in obese men, SpringerPlus, 2 pp. 532. ISSN 2193-1801 (2013) [Refereed Article]
Copyright 2013 Alkahtani et al. Licensed under Creative Commons Attribution 2.0 Generic (CC BY 2.0) https://creativecommons.org/licenses/by/2.0/
Purpose: The objectives of this study were to examine the effect of 4-week moderate- and high-intensity interval training (MIIT and HIIT) on fat oxidation and the responses of blood lactate (BLa) and rating of perceived exertion (RPE).
Methods: Ten overweight/obese men (age = 29 ±3.7 years, BMI = 30.7 ±3.4 kg/m2) participated in a cross-over study of 4-week MIIT and HIIT training. The MIIT training sessions consisted of 5-min cycling stages at mechanical workloads 20% above and 20% below 45%VO2peak. The HIIT sessions consisted of intervals of 30-s work at 90%VO2peak and 30-s rest. Pre- and post-training assessments included VO2max using a graded exercise test (GXT) and fat oxidation using a 45-min constant-load test at 45%VO2max. BLa and RPE were also measured during the constant-load exercise test.
Results: There were no significant changes in body composition with either intervention. There were significant increases in fat oxidation after MIIT and HIIT (p ≤ 0.01), with no effect of intensity. BLa during the constant-load exercise test significantly decreased after MIIT and HIIT (p ≤ 0.01), and the difference between MIIT and HIIT was not significant (p = 0.09). RPE significantly decreased after HIIT greater than MIIT (p ≤ 0.05).
Conclusion: Interval training can increase fat oxidation with no effect of exercise intensity, but BLa and RPE decreased after HIIT to greater extent than MIIT.
|Item Type:||Refereed Article|
|Research Division:||Health Sciences|
|Research Group:||Sports science and exercise|
|Research Field:||Exercise physiology|
|Objective Group:||Specific population health (excl. Indigenous health)|
|Objective Field:||Men's health|
|UTAS Author:||Hills, AP (Professor Andrew Hills)|
|UTAS Author:||Byrne, NM (Professor Nuala Byrne)|
|Web of Science® Times Cited:||29|
|Deposited By:||Health Sciences|
|Downloads:||121 View Download Statistics|
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