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- Title
Diabetes and technology for increased activity study: the effects of exercise and technology on heart rate variability and metabolic syndrome risk factors.
- Authors
Stuckey, Melanie I.; Kiviniemi, Antti M.; Petrella, Robert J.
- Abstract
This study tested the hypothesis that an 8-week exercise intervention supported by mobile health (mHealth) technology would improve metabolic syndrome (MetS) risk factors and heart rate variability (HRV) in a population with MetS risk factors. Participants (n =12; three male; aged 56.9±7.0 years) reported to the laboratory for assessment of MetS risk factors and fitness (VO2max) at baseline (V 0) and after 8-weeks (V 2) of intervention. Participants received an individualized exercise prescription and a mHealth technology kit for remote monitoring of blood pressure (BP), blood glucose, physical activity, and body weight via smartphone. Participants underwent 24-h ambulatory monitoring of R-R intervals following V 0 and V 2. Low and high frequency powers of HRV were assessed from the recording and the ratio of low-to-high frequency powers and low and high frequency powers in normalized units were calculated. One-way repeated measures analysis of variance showed that waist circumference (V 0: 113.1±11.0 cm, V 2: 108.1±14.7 cm; p =0.004) and diastolic BP (V0: 81±6mmHg, V 2: 76±11 mmHg; p =0.04) were reduced and VO2max increased (V 0: 31.3 ml/kg/min, V 2: 34.8 ml/kg/min; p =0.02) with no changes in other MetS risk factors. Low and high frequency powers in normalized units were reduced (V 0: 75.5±12.0, V 2: 72.0±12.1; p =0.03) and increased (V 0: 24.5±12.0, V 2: 28.0±12.1; p =0.03), respectively, with no other changes in HRV. Over the intervention period, changes in systolic BP were correlated negatively with the changes in R-R interval (r =-0.600; p =0.04) and positively with the changes in heart rate (r =0.611; p =0.03), with no other associations between MetS risk factors and HRV parameters. Thus, this 8-week mHealth supported exercise intervention improved MetS risk factors and HRV parameters, but only changes in systolic BP were associated with improved autonomic function.
- Subjects
EXERCISE physiology; PHYSICAL activity; BLOOD pressure; BODY weight; MEDICAL databases; INFORMATION storage &; retrieval systems
- Publication
Frontiers in Endocrinology, 2013, Vol 4, p1
- ISSN
1664-2392
- Publication type
Article
- DOI
10.3389/fendo.2013.00121