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Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
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Cristian ÁLVAREZ 1, 2, Rodrigo RAMÍREZ-CAMPILLO 1, 2, Cristian MARTÍNEZ 3, Mauricio CASTRO-SEPÚLVEDA 4, Johnattan CANO-MONTOYA 5, Rodrigo MANCILLA 6, Marcelo FLORES-OPAZO 7
1 Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile; 2 Research Nucleus in Health, Physical Activity and Sports, Universidad de Los Lagos, Osorno, Chile; 3 Faculty of Education, Social Sciences and Humanities, Department of Physical Education and Recreation, Universidad de la Frontera, Temuco, Chile; 4 Exercise Science Laboratory, School of Kinesiology, Faculty of Medicine, Universidad Finis Terrae, Santiago, Chile; 5 Public Hospital of Los Lagos, Chile; 6 Maastricht University, Faculty of Health, Medicine and Life Sciences, Department of Human Movement Science, Maastricht, The Netherlands; 7 University of Melbourne, Faculty of Medicine, Dentistry and Health Sciences, Department of Physiology, Victoria, Australia
BACKGROUND: The aim of this study was to assess the effects of three exercise training program in the adaptation of the heart rate recovery of patients with insulin resistance.
METHODS: We studied 43 women with insulin resistance, which were assigned to three training groups: i) high intensity interval training (HIT, age 39.0 ± 10 y), ii) strength training (ST, age 33.9 ± 9.4 y), iii) mixed training of HIT+ST (MIXT, age 43.3 ± 8.1 y), and iv) and control group (CG, age 40.1 ± 11 y). Heart rate was measured at rest (HRrest), during the 2km walking test (UKKT) for mean (HRDE), and maximum (HRMDE), and during the recovery at one, two, and three minutes immediately after the UKKT. Additionally, anthropometric measurements (body mass and body mass index) were assessed.
RESULTS: HIT training significantly decreased resting heart rate and HRDE (-4.5% and -2% respectively, P<0.05). MIXT training also decreased HRDE in -3% whilst both average and maximal HR during UKK were significantly increased in the control group HRDE (+2% and +3% respectively). Moreover, there were significant reductions in HR recovery at 1, 2 and 3 minutes after both HIT and MIXT training, whereas these values were increased in control group.
CONCLUSIONS: Our findings suggest that HIT induces meaningful cardiovascular adaptations in patient with insulin resistance, reducing heart rate at rest, as well as during and after exercise, and that complementary strength training increases these adaptations.