Moderate and heavy metabolic stress interval training improve arterial stiffness and heart rate dynamics in humans.
Eur J Appl Physiol
; 113(4): 839-49, 2013 Apr.
Article
en En
| MEDLINE
| ID: mdl-22983616
ABSTRACT
Traditional continuous aerobic exercise training attenuates age-related increases of arterial stiffness, however, training studies have not determined whether metabolic stress impacts these favourable effects. Twenty untrained healthy participants (n = 11 heavy metabolic stress interval training, n = 9 moderate metabolic stress interval training) completed 6 weeks of moderate or heavy intensity interval training matched for total work and exercise duration. Carotid artery stiffness, blood pressure contour analysis, and linear and non-linear heart rate variability were assessed before and following training. Overall, carotid arterial stiffness was reduced (p < 0.01), but metabolic stress-specific alterations were not apparent. There was a trend for increased absolute high-frequency (HF) power (p = 0.10) whereas both absolute low-frequency (LF) power (p = 0.05) and overall power (p = 0.02) were increased to a similar degree following both training programmes. Non-linear heart rate dynamics such as detrended fluctuation analysis [Formula see text] also improved (p > 0.05). This study demonstrates the effectiveness of interval training at improving arterial stiffness and autonomic function, however, the metabolic stress was not a mediator of this effect. In addition, these changes were also independent of improvements in aerobic capacity, which were only induced by training that involved a high metabolic stress.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Estrés Fisiológico
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Enfermedades Cardiovasculares
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Ejercicio Físico
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Arterias Carótidas
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Rigidez Vascular
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Frecuencia Cardíaca
Tipo de estudio:
Diagnostic_studies
/
Prognostic_studies
Límite:
Adult
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Female
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Humans
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Male
País/Región como asunto:
Europa
Idioma:
En
Revista:
Eur J Appl Physiol
Asunto de la revista:
FISIOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Reino Unido