Influence of high- and low-carbohydrate diet following glycogen-depleting exercise on heart rate variability and plasma catecholamines

Autor(es)

Lima-Silva, Adriano Eduardo ^[1] ; Bertuzzi, Romulo ^[2] ; Dalquano, Elen ^[1] ; Nogueira, Marie ^[3] ; Casarini, Dulce ^[3] ; Kiss, Maria Augusta ^[2] ; Ugrinowitsch, Carlos ^[2] ; Pires, Flavio de Oliveira ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Alagoas, Sports Sci Res Grp, BR-57072970 Maceio, Alagoas - Brazil

^[2] Univ Sao Paulo, Sch Phys Educ & Sport, Sao Paulo - Brazil

^[3] Univ Fed Sao Paulo, Hypertens & Kidney Hosp, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: APPLIED PHYSIOLOGY NUTRITION AND METABOLISM; v. 35, n. 4, p. 541-547, AUG 2010.
• Citações Web of Science: 5

Resumo

The purpose of this study was to investigate the effects of a short-term low-or high-carbohydrate (CHO) diet consumed after exercise on sympathetic nervous system activity. Twelve healthy males underwent a progressive incremental test; a control measurement of plasma catecholamines and heart rate variability (HRV); an exercise protocol to reduce endogenous CHO stores; a low-or high-CHO diet (counterbalanced order) consumed for 2 days, beginning immediately after the exercise protocol; and a second resting plasma catecholamine and HRV measurement. The exercise and diet protocols and the second round of measurements were performed again after a 1-week washout period. The mean (+/- SD) values of the standard deviation of R-R intervals were similar between conditions (control, 899.0 +/- 146.1 ms; low-CHO diet, 876.8 +/- 115.8 ms; and high-CHO diet, 878.7 +/- 127.7 ms). The absolute high-and low-frequency (HF and LF, respectively) densities of the HRV power spectrum were also not different between conditions. However, normalized HF and LF (i.e., relative to the total power spectrum) were lower and higher, respectively, in the low-CHO diet than in the control diet (mean +/- SD, 17 +/- 9 normalized units (NU) and 83 +/- 9 NU vs. 27 +/- 11 NU and 73 +/- 17 NU, respectively; p < 0.05). The LF/HF ratio was higher with the low-CHO diet than with the control diet (mean +/- SD, 7.2 +/- 6.2 and 4.2 +/- 3.2, respectively; p < 0.05). The mean values of plasma catecholamines were not different between diets. These results suggest that the autonomic control of the heart rate was modified after a short-term low-CHO diet, but plasma catecholamine levels were not altered. (AU)

• Processo FAPESP: 08/50934-1 - Influência do treinamento de força e de vibração no tempo de permanência na velocidade correspondente ao consumo máximo de oxigênio
• Beneficiário: Rômulo Cássio de Moraes Bertuzzi
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 06/60641-6 - Estado dinâmico metabólico durante cargas constantes em cicloergômetro
• Beneficiário: Maria Augusta Peduti Dal Molin Kiss
• Modalidade de apoio: Auxílio à Pesquisa - Regular