Short-Term High-Intensity Interval Training Is Superior to Moderate-Intensity Continuous Training in Improving Cardiac Autonomic Function in Children.
Cardiology
; 141(1): 1-8, 2018.
Article
em En
| MEDLINE
| ID: mdl-30227396
ABSTRACT
OBJECTIVES:
This study aimed to investigate the impact of 3 isocaloric exercise programs on cardiac autonomic nervous system (ANS) functioning in children.METHODS:
One hundred nine children (39% boys and 61% girls) aged 10-13 years (mean 11.07 ± 0.81) were conveniently assigned to 1 of 4 groups as follows Moderate-intensity continuous training (MICT; n = 29) at 65-70% of the predicted maximum heart rate (MHR), High-intensity interval training (HIIT; n = 29) at > 80% of the predicted MHR, HIIT and MICT combined on alternate weeks (ALT; n = 27), and a control group (n = 24). Morning ANS activity was assessed via analysis of heart rate variability (HRV), with the patient in supine position for 10 min, before and after the exercise intervention. DATAANALYSIS:
A 2-way analysis of variance was used to evaluate the effects of training on all HRV parameters (p < 0.05/4 = 0.0125).RESULTS:
After 5 weeks of training, significant improvements were observed for ln of the standard deviation of normal-to-normal intervals (p < 0.0001), ln of the root mean square of successive difference (p < 0.0001), and ln of standard deviation 1 (p < 0.0001), with superior results reported in the HIIT group (effect size [ES] = 2.22, 2.69, and 2.69) compared with the MICT (ES = 1.67, 1.75, and 1.75) and ALT (ES = 0.87, 1.06, and 1.06) groups, respectively.CONCLUSION:
Short-term HIIT seems to induce superior alterations in cardiac ANS activity compared to MICT and ALT in children through enhanced vagal activity.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Caminhada
/
Treinamento Intervalado de Alta Intensidade
/
Frequência Cardíaca
Limite:
Adolescent
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Child
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Female
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Humans
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Male
País/Região como assunto:
Africa
Idioma:
En
Revista:
Cardiology
Ano de publicação:
2018
Tipo de documento:
Article