Leg strength is associated with ventilatory efficiency in older women.
Int J Sports Med
; 33(7): 537-42, 2012 Jul.
Article
em En
| MEDLINE
| ID: mdl-22499568
ABSTRACT
The aim of the present study was to determine if leg function is associated with ventilatory efficiency during exercise in healthy older adults. 24 women and 18 men aged 60-80 years performed treadmill exercise to fatigue for calculation of ventilatory efficiency using the ratio of ventilation to carbon dioxide at the anaerobic threshold (VE/VCO2@AT). On a separate day, participants performed leg strength testing and graded single-leg knee extension exercise. The VE/VCO2@AT was higher in women than men (33±3 vs. 30±3; p=0.03). After adjustment for age and VO(2max), leg strength (knee extensor isometric force) was inversely associated with VE/VCO2@AT in women (r= - 0.44, p=0.03) while no relationships were found for men. Strength-matched women and men had similar VE/VCO2@AT indicating that the correlation between leg strength and VE/VCO2@AT was strength- but not sex-specific. During knee extensor exercise, women with lower leg strength had increased VE/VCO2 slope across 0-15 W as compared to higher strength women (38±8 vs. 31±3; p<0.05), while no differences were found for men. These results find leg strength to be associated with ventilatory responses to exercise in healthy older women, a finding that might be related to lower leg strength in women than men.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ventilação Pulmonar
/
Força Muscular
/
Joelho
Tipo de estudo:
Risk_factors_studies
Limite:
Aged
/
Aged80
/
Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Revista:
Int J Sports Med
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Estados Unidos