One-arm maximal strength training improves work economy and endurance capacity but not skeletal muscle blood flow.
J Sports Sci
; 29(2): 161-70, 2011 Jan.
Article
em En
| MEDLINE
| ID: mdl-21170803
ABSTRACT
Maximal strength training with a focus on maximal mobilization of force in the concentric phase improves endurance performance that employs a large muscle mass. However, this has not been studied during work with a small muscle mass, which does not challenge convective oxygen supply. We therefore randomized 23 adult females with no arm-training history to either one-arm maximal strength training or a control group. The training group performed five sets of five repetitions of dynamic arm curls against a near-maximal load, 3 days a week for 8 weeks. This training increased maximal strength by 75% and improved rate of force development during both strength and endurance exercise, suggesting that each arm curl became more efficient. This coincided with a 17-18% reduction in oxygen cost at standardized submaximal workloads (work economy), and a 21% higher peak oxygen uptake and 30% higher peak load during maximal arm endurance exercise. Blood flow assessed by Doppler ultrasound in the axillary artery supplying the working biceps brachii and brachialis muscles could not explain the training-induced adaptations. These data suggest that maximal strength training improved work economy and endurance performance in the skeletal muscle, and that these effects are independent of convective oxygen supply.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Consumo de Oxigênio
/
Resistência Física
/
Braço
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Músculo Esquelético
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Esforço Físico
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Força Muscular
/
Treinamento Resistido
Tipo de estudo:
Clinical_trials
/
Health_economic_evaluation
Limite:
Adolescent
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Adult
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Female
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Humans
Idioma:
En
Revista:
J Sports Sci
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Reino Unido