Dose-response relationship of cardiorespiratory fitness adaptation to controlled endurance training in sedentary older adults.
Eur J Prev Cardiol
; 23(5): 518-29, 2016 Mar.
Article
en En
| MEDLINE
| ID: mdl-25901000
ABSTRACT
BACKGROUND:
The purpose of this investigation was to identify a quantitative dose-response relationship for enhancing maximal oxygen consumption (VO2max) in healthy sedentary older adults after controlled endurance training. METHODS ANDRESULTS:
This meta-analysis of controlled clinical trials included 1257 exercisers and 845 controls with a mean age of 67.45 ± 5.25 years. Effect sizes were calculated for training-induced VO2max changes. Different training regimens were analyzed and compared. The weighted net change of the mean VO2max values showed a significant increase of 3.78 ml/kg per min (95% confidence interval = 3.29 to 4.27; p < 0.0001) in response to aerobic training. Interstudy differences in VO2max changes were significantly related to exercise intensity, and explained approximately 11% of the variance of the VO2max responses. VO2max improved significantly at 35%-50% heart rate reserve (HRR) and continued improving at a greater rate with increasing "dose". The largest VO2max-improvement adaptation was achieved with a mean intensity of 66%-73% HRR. The magnitudes of the VO2max adaptation are identical to exercise at 57%-65% HRR and at 75%-80% HRR. Higher intensity doses more than 75-80% HRR did not lead to greater enhancement of VO2max improvements but, conversely, resulted in large declines.CONCLUSIONS:
Our data provide quantitative insight into the magnitude of VO2max alterations as affected by exercise intensity, duration, frequency, and program length. The shapes of the dose-response curves are not simply linear, but with many similar trends and noteworthy characteristics. Aerobic training at a mean intensity of 66%-73% HRR with 40-50 min per session for 3-4 day/week for 30-40 weeks appears to be effective and optimal for maximum cardiorespiratory benefits in healthy sedentary older adults.Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Consumo de Oxígeno
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Resistencia Física
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Terapia por Ejercicio
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Conducta Sedentaria
Tipo de estudio:
Clinical_trials
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Prognostic_studies
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Systematic_reviews
Límite:
Aged
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Aged80
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Eur J Prev Cardiol
Año:
2016
Tipo del documento:
Article
País de afiliación:
China