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Article

Effects of Two Workload-Matched High-Intensity Interval Training Protocols on Regional Body Composition and Fat Oxidation in Obese Men

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School of Physical Education & Sports Science, University of Thessaly, 42100 Trikala, Greece
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Unit of Metabolism and Endocrinology of Physical Activity and Sport, Department of Medicine, National & Kapodistrian University of Athens, Aretaieion Hospital, 11528 Athens, Greece
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Faculty of Education, Health and Wellbeing, University of Wolverhampton, Walsall WS1 3BD, UK
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School of Physical Education & Sports Science, Aristotle University of Thessaloniki, 57001 Thessaloniki, Greece
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Department of Dietetics, Evaggelismos General Hospital, 10676 Athens, Greece
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School of Physical Education and Sport Science, National and Kapodistrian University of Athens, 17237 Athens, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: David C. Nieman
Nutrients 2021, 13(4), 1096; https://doi.org/10.3390/nu13041096
Received: 21 February 2021 / Revised: 20 March 2021 / Accepted: 23 March 2021 / Published: 27 March 2021
(This article belongs to the Special Issue Metabolic Adaptations to Diet and Physical Activity)
The effects of two high-intensity interval training (HIIT) protocols on regional body composition and fat oxidation in men with obesity were compared using a parallel randomized design. Sixteen inactive males (age, 38.9 ± 7.3 years; body fat, 31.8 ± 3.9%; peak oxygen uptake, VO2peak, 30.9 ± 4.1 mL/kg/min; all mean ± SD) were randomly assigned to either HIIT10 (48 × 10 s bouts at 100% of peak power [Wpeak] with 15 s of recovery) or HIIT60 group (8 × 60 s bouts at 100% Wpeak with 90 s of recovery), and subsequently completed eight weeks of training, while maintaining the same diet. Analyses of variance (ANOVA) showed only a main effect of time (p < 0.01) and no group or interaction effects (p > 0.05) in the examined parameters. Total and trunk fat mass decreased by 1.81 kg (90%CI: −2.63 to −0.99 kg; p = 0.002) and 1.45 kg (90%CI: −1.95 to −0.94 kg; p < 0.001), respectively, while leg lean mass increased by 0.86 kg (90%CI: 0.63 to 1.08 kg; p < 0.001), following both HIIT protocols. HIIT increased peak fat oxidation (PFO) (from 0.20 ± 0.05 to 0.33 ± 0.08 g/min, p = 0.001), as well as fat oxidation over a wide range of submaximal exercise intensities, and shifted PFO to higher intensity (from 33.6 ± 4.6 to 37.6 ± 6.7% VO2peak, p = 0.039). HIIT, irrespective of protocol, improved VO2peak by 20.0 ± 7.2% (p < 0.001), while blood lactate at various submaximal intensities decreased by 20.6% (p = 0.001). In conclusion, both HIIT protocols were equally effective in improving regional body composition and fat oxidation during exercise in obese men. View Full-Text
Keywords: obesity; intermittent exercise; weight loss; whole-body fat oxidation obesity; intermittent exercise; weight loss; whole-body fat oxidation
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MDPI and ACS Style

Tsirigkakis, S.; Mastorakos, G.; Koutedakis, Y.; Mougios, V.; Nevill, A.M.; Pafili, Z.; Bogdanis, G.C. Effects of Two Workload-Matched High-Intensity Interval Training Protocols on Regional Body Composition and Fat Oxidation in Obese Men. Nutrients 2021, 13, 1096. https://doi.org/10.3390/nu13041096

AMA Style

Tsirigkakis S, Mastorakos G, Koutedakis Y, Mougios V, Nevill AM, Pafili Z, Bogdanis GC. Effects of Two Workload-Matched High-Intensity Interval Training Protocols on Regional Body Composition and Fat Oxidation in Obese Men. Nutrients. 2021; 13(4):1096. https://doi.org/10.3390/nu13041096

Chicago/Turabian Style

Tsirigkakis, Spyridon, George Mastorakos, Yiannis Koutedakis, Vassilis Mougios, Alan M. Nevill, Zoe Pafili, and Gregory C. Bogdanis 2021. "Effects of Two Workload-Matched High-Intensity Interval Training Protocols on Regional Body Composition and Fat Oxidation in Obese Men" Nutrients 13, no. 4: 1096. https://doi.org/10.3390/nu13041096

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