Exercise training associated with diet improves heart rate recovery and cardiac autonomic nervous system activity in obese children.
| Autor: | Prado DM; Medical School, Department of Endocrinology, University of São Paulo, Brazil. danilomprado@usp.br, Silva AG, Trombetta IC, Ribeiro MM, Guazzelli IC, Matos LN, Santos MS, Nicolau CM, Negrão CE, Villares SM |
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| Jazyk: | angličtina |
| Zdroj: | International journal of sports medicine [Int J Sports Med] 2010 Dec; Vol. 31 (12), pp. 860-5. Date of Electronic Publication: 2010 Nov 11. |
| DOI: | 10.1055/s-0030-1267158 |
| Abstrakt: | The purpose of this study was to test the hypotheses that in obese children: 1) hypocaloric diet (D) improves both heart rate recovery at 1 min (Δ HRR1) cfter an exercise test, and cardiac autonomic nervous system activity (CANSA) in obese children; 2) Diet and exercise training (DET) combined leads to greater improvement in both Δ HRR1 after an exercise test and in CANSA, than D alone. Moreover, we examined the relationships among Δ HRR1, CANSA, cardiorespiratory fitness and anthropometric variables (AV) in obese children submitted to D and to DET. 33 obese children (10 ± 0.2 years; body mass index (BMI) >95 (th) percentile) were divided into 2 groups: D (n=15; BMI=31 ± 1 kg/m²)) and DET (n=18; 29 ± 1 kg/m²). All children performed a maximal cardiopulmonary exercise test on a treadmill. The Δ HRR1 or LF/HF ratio (P>0.05). In contrast, the DET group showed increased peak VO₂ ( P=0.01) and improved Δ HRR1 (Δ HRR1=37.3 ± 2.6; P=0.01) and LF/HF ratio ( P=0.001). The DET group demonstrated significant relationships among Δ HRR1, peak VO₂ and CANSA (P<0.05). In conclusion, DET, in contrast to D, promoted improved ÄΔ HRR1 and CANSA in obese children, suggesting a positive influence of increased levels of cardiorespiratory fitness by exercise training on cardiac autonomic activity. (© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York.) |
| Databáze: | MEDLINE |
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