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Physiological Responses during Interval Training with Different Intensities and Duration of Exercise.
MedLine Citation:
PMID:  21522072     Owner:  NLM     Status:  In-Data-Review    
Zuniga, JM, Berg, K, Noble, J, Harder, J, Chaffin, ME, and Hanumanthu, VS. Physiological responses during interval training with different intensities and duration of exercise. J Strength Cond Res 25(5): 1279-1284, 2011-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 &OV0312;O2, total &OV0312;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 &OV0312;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 &OV0312;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 &OV0312;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 (&OV0312;O2) and lower BLC than longer (i.e., 3 minutes) intervals.
Jorge M Zuniga; Kris Berg; John Noble; Jeanette Harder; Morgan E Chaffin; Vidya S Hanumanthu
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of strength and conditioning research / National Strength & Conditioning Association     Volume:  25     ISSN:  1533-4287     ISO Abbreviation:  J Strength Cond Res     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-04-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9415084     Medline TA:  J Strength Cond Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1279-84     Citation Subset:  IM    
1Human Performance Laboratory, Department of Nutrition and Health Sciences, Center of Youth Fitness and Sports Research, University of Nebraska Lincoln, Lincoln, Nebraska; 2School of Health, Physical Education, and Recreation, University of Nebraska at Omaha, Omaha, Nebraska; 3School of Social Work, University of Nebraska at Omaha, Omaha, Nebraska; and 4Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska.
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