Physiological Responses during Interval Training with Different Intensities and Duration of Exercise

• Autores: Jorge M. Zuniga, Kris E. Berg, John M. Noble, Jeanette Harder, Morgan E. Chaffin, Vidya S. Hanumanthu
• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 25, Nº. 5, 2011, págs. 1279-1284
• Idioma: inglés
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• Dialnet Métricas: 1 Cita
• Resumen

  • The purpose of this study was to compare 4 interval training (IT) sessions with different intensities and durations of exercise to determine the effect on mean [latin capital V with dot above]O2, total [latin capital V with dot above]O2, and duration of exertion >=95% maximum power output (MPO), and the effects on biomarkers of fatigue such as blood-lactate concentration (BLC) and rating of perceived exertion. The subjects were 12 recreationally competitive male (n = 7, mean ± SD age = 26.2 ± 3.9 years) and female (n = 5, mean ± SD age = 27.6 ± 4.3 years) triathletes. These subjects performed 4 IT sessions on a cycle ergometer varying in intensity (90 and 100% MPO) and duration of exercise (30 seconds and 3 minutes). This study revealed that IT using 30-second duration intervals (30-30 seconds) allows the athlete to perform a longer session, with a higher total and mean [latin capital V with dot above]O2 HR and lower BLC than 3-minute durations. Similarly, submaximal exertion at 90% of MPO also allows performing longer sessions with a higher total [latin capital V with dot above]O2 than 100% intensity. Thus, the results of the present study suggested that to increase the total time at high intensity of exercise and total [latin capital V with dot above]O2 of a single exercise session performed by the athlete, IT protocols of short durations (i.e., 30 seconds) and submaximal intensities (i.e., 90% MPO) should be selected. Furthermore, performing short-duration intervals may allow the athlete to complete a longer IT session with greater metabolic demands ([latin capital V with dot above]O2) and lower BLC than longer (i.e., 3 minutes) intervals.