Comparison of Three Popular Exercise Modalities on VËO2max in Overweight and Obese.
Med Sci Sports Exerc
; 48(3): 491-8, 2016 Mar.
Article
en En
| MEDLINE
| ID: mdl-26440134
INTRODUCTION: In this prospective randomized trial, we examined the effect of three popular exercise training modalities on maximal oxygen uptake (VËO2max) in overweight and obese individuals. In addition, we examined possible concomitant adaptations in endurance exercise performance (time to exhaustion (TTE)), citrate synthase (CS) activity, venous and arterial function, blood volume, and calculated stroke volume (SV). METHODS: Thirty subjects were recruited (age, 41 ± 9 yr; weight, 91 ± 14 kg; height, 173 ± 8 cm; body mass index, 30 ± 4 kg·m(-2)) and randomized to either 6 wk of 4 × 4-min high-intensity interval training (4HIIT) at 85%-95% of HRmax, 10 × 1-min HIIT (1HIIT) at VËO2max load, or 45-min moderate-intensity continuous training (MICT) at 70% of HRmax. VËO2max, TTE, CS activity, venous and arterial function, as well as blood volume were measured before and after the training period. O2 pulse was calculated and used to estimate SV. Analysis was conducted per protocol. RESULTS: Only 4HIIT increased VËO2max (P < 0.01) and significantly more compared with 1HIIT (P = 0.04) and MICT (P = 0.03) (4HIIT, 10%; 1HIIT, 3.3%; and MICT, 3.1%). All groups increased TTE (4HIIT, 198%; 1HIIT, 116%; MICT, 52%), with a higher increase after 4HIIT compared with that after MICT (P = 0.02). Calculated SV increased only after 4HIIT (14.4%). Plasma volume and hemoglobin mass increased after 1HIIT only (5.6% and 6.5%); however, no group differences were found. All groups increased CS activity (4HIIT, 35%; 1HIIT, 35%; MICT, 56%), with no group differences. Arterial inflow (15.7%) and venous outflow (22.7%) decreased after MICT, but there were no group differences. CONCLUSIONS: 4HIIT was superior to 1HIIT and MICT in improving VËO2max likely because of an increased SV.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Consumo de Oxígeno
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Ejercicio Físico
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Sobrepeso
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Entrenamiento de Intervalos de Alta Intensidad
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Obesidad
Tipo de estudio:
Clinical_trials
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Observational_studies
Límite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Med Sci Sports Exerc
Año:
2016
Tipo del documento:
Article
País de afiliación:
Noruega
Pais de publicación:
Estados Unidos