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ORIGINAL ARTICLE  EPIDEMIOLOGY AND CLINICAL MEDICINE 

The Journal of Sports Medicine and Physical Fitness 2018 July-August;58(7-8):1116-26

DOI: 10.23736/S0022-4707.17.07639-3

Copyright © 2017 EDIZIONI MINERVA MEDICA

lingua: Inglese

Acute blood glucose, cardiovascular and exaggerated responses to HIIT and moderate-intensity continuous training in men with type 2 diabetes mellitus

Shohn G. WORMGOOR 1, 2, Lance C. DALLECK 3, Caryn ZINN 2, Nigel K. HARRIS 2

1 School of Applied Sciences and Applied Health, Faculty of Health and Sciences, Universal College of Learning, U-Kinetics Exercise and Wellness Clinic, Palmerston North, New Zealand; 2 Human Potential Center, Auckland University of Technology, Auckland, New Zealand; 3 High Altitude Exercise Physiology Program, Western State Colorado University, Gunnison, CO, USA


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BACKGROUND: Optimizing exercise-induced physiological responses without increasing the risk of negative exaggerated responses is an important aspect of exercise prescription for people with type 2 diabetes mellitus (T2DM). However, knowledge of acute responses, including exaggerated responses, of different training modalities is limited. The aim of the study was to compare acute physiological responses of moderate-intensity continuous training (MICT) and high-intensity interval training (HIIT) in T2DM.
METHODS: Baseline data were used to randomly assign male participants into supervised training groups for a 12-week intervention. During week 7, participants trialed either a fully progressed MICT (N.=11) or HIIT (N.=11) (combined with resistance training) session. The MICT included 26 minutes at 55% estimated maximum workload (eWLmax) while the HIIT included twelve 1-minute bouts at 95% eWLmax interspersed with 1-minute bouts at 40% eWLmax.
RESULTS: While energy expenditure and peak systolic and diastolic blood pressure responses were similar between groups (P=0.47, P=0.71, P=0.56, respectively), peak heart rate, workload and perceived exertion were higher in the HIIT group (P=0.04, P<0.001, and P<0.001, respectively). Acute exaggerated responses were similar (P=0.39) for MICT (64%) and HIIT (36%) participants.
CONCLUSIONS: While structured MICT and HIIT sessions resulted in comparable acute physiological responses, the individual variations and exaggerated responses, even after preparatory training, necessitated precautionary respite in T2DM men.


KEY WORDS: Blood glucose - Blood pressure - High-intensity interval training

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