Effects of Short Duration High-intensity Interval Training on Peak Oxygen Consumption
Overview
- Phase
- Not Applicable
- Intervention
- Not specified
- Conditions
- Cardiovascular Fitness
- Sponsor
- University of Texas at Austin
- Enrollment
- 11
- Locations
- 1
- Primary Endpoint
- Cardiovascular changes
- Status
- Completed
- Last Updated
- 5 years ago
Overview
Brief Summary
High-intensity interval training (HIIT) is an effective tool to improve cardiovascular fitness and maximal anaerobic power. Different methods of HIIT have been studied but the effect of a maximal effort cycling and very short exercise time (i.e., 4-s) with short recovery time (15-30 s) and a high number of repetitions (i.e., 30 bouts) is unknown.
Detailed Description
The investigators examined the effects of training at maximal anaerobic power during cycling (PC) on maximal anaerobic power, peak oxygen consumption (VO2peak), and total blood volume in 11 young healthy individuals (age: 21.3±0.5 y) (6 men, 5 women). Methods: Participants trained three times a week for eight weeks performing a PC program consisting of 30 bouts of 4-s at an all-out intensity (i.e., 2 minutes of exercise per session). The cardiovascular stress progressively increased over the weeks by decreasing the recovery time between sprints (30 to 24 to 15-s) and thus session time decreased from 17 to \< 10 min.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Young (18-30), Healthy, Recreationally active, but untrained (not meeting ACSM's recommendations of 150 min/week of moderate-vigorous aerobic exercise) -
Exclusion Criteria
- •Cardiovascular disease Smoking Subjects who were exercising regularly (\>75 min/week) were excluded.
Outcomes
Primary Outcomes
Cardiovascular changes
Time Frame: Pre and post training (8 weeks)
Maximal oxygen consumption (VO2max) is an indicator of health and fitness. The investigators measured VO2max with a graded exercise using electronically braked cycling ergometer.
Blood volume changes
Time Frame: Pre and post training (8 weeks)
Hematological variables can effect the performance of the people. The investigators measured total blood volume, red blood cell volume, and plasma volume before and after training.
Secondary Outcomes
- Performance changes(Pre and post training (8 weeks))