12 weeks of combined exercise is better than aerobic exercise for increasing growth hormone in middle-aged women.
Int J Sport Nutr Exerc Metab
; 20(1): 21-6, 2010 Feb.
Article
em En
| MEDLINE
| ID: mdl-20190348
ABSTRACT
BACKGROUND:
The purpose of this study was to examine the effects of combined exercise training on growth hormone (GH), insulin-like growth factor-1 (IGF-1), and metabolic-syndrome factors and determine whether the changes in GH and/or IGF-1 induced by exercise correlate to the metabolic-syndrome factors in healthy middle-aged women (50-65 years of age).METHODS:
The participants were randomly assigned into an aerobic-exercise training (walking + aerobics) group (AEG; n = 7), a combined-exercise training (walking + resistance training) group (CEG; n = 8), or a control group (CG; n = 7). Exercise sessions were performed 3 times per wk for 12 wk. The aerobic-exercise training consisted of walking and aerobics at 60-80% of heart-rate reserve, and the combined-exercise training consisted of walking and resistance exercise at 50-70% of 1-repetition maximum.RESULTS:
GH, percentage body fat, fasting glucose, systolic blood pressure, and waist circumference were significantly improved in CEG (p < .05). However, GH induced by exercise training showed no correlation with metabolic-syndrome factors. IGF-1 was not significantly increased in either AEG or CEG compared with CG.CONCLUSION:
These results indicate that the combined-exercise training produced more enhancement of GH, body composition, and metabolic-syndrome factors than did aerobic-exercise training.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Fator de Crescimento Insulin-Like I
/
Caminhada
/
Hormônio do Crescimento Humano
/
Síndrome Metabólica
/
Treinamento Resistido
Tipo de estudo:
Clinical_trials
/
Etiology_studies
Limite:
Aged
/
Female
/
Humans
/
Middle aged
Idioma:
En
Revista:
Int J Sport Nutr Exerc Metab
Ano de publicação:
2010
Tipo de documento:
Article