Effects of Short Duration High-intensity Interval Training on Peak Oxygen Consumption

Cardiovascular Fitness Clinical Trial

Official title:

Effects of Short Duration High-intensity Interval Training on Peak Oxygen Consumption

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04656509
• Other study ID #: 2019-01-0132
• Status: Completed
• Phase: N/A
• Start date: April 1, 2019
• Est. completion date: April 24, 2020

Study information

• Verified date: December 2020
• Source: University of Texas at Austin
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 11
• Est. completion date: April 24, 2020
• Est. primary completion date: March 31, 2020
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 18 Years to 49 Years

Eligibility

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.

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Related Conditions & MeSH terms

• Cardiovascular Fitness

Intervention

Other:
• 4-s sprint inertial load training
A program employing 30 bouts of 4s inertial load sprint training with progressively reduced recovery time (30 to 15 s) between sprints is effective for improving blood volume, VO2peak and maximal power.

Locations

Country	Name	City	State
United States	Human Performance Laboratory, Department of Kinesiology and Health Education, the University of Texas at Austin	Austin	Texas

Sponsors (1)

Lead Sponsor	Collaborator
University of Texas at Austin

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Cardiovascular changes	Maximal oxygen consumption (VO2max) is an indicator of health and fitness. The investigators measured VO2max with a graded exercise using electronically braked cycling ergometer.	Pre and post training (8 weeks)
Primary	Blood volume changes	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.	Pre and post training (8 weeks)
Secondary	Performance changes	Study participants trained at maximal anaerobic power for 4-s. Therefore, the investigators measured maximal anaerobic power with different testing methods.	Pre and post training (8 weeks)