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OpenTrials
Completed

NCT Number: NCT04656509

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

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.

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Key information

Conditions

Cardiovascular Fitness Behavior Motor Activity

Age range

18 year–49 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Human Performance Laboratory, Department of Kinesiology and Health Education, the University of Texas at Austin

Austin, Texas, 78712, United States

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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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Treatment and study plan

4-s sprint inertial load training

Other

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.

Primary outcomes

  1. 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.

  2. 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

  1. Performance changes

    Time frame: Pre and post training (8 weeks)

    Study participants trained at maximal anaerobic power for 4-s. Therefore, the investigators measured maximal anaerobic power with different testing methods.

Sponsors and collaborators

Lead sponsor

University of Texas at Austin

Other

Registry information

Important dates

Study start
2019
Primary completion
2020
Study completion
2020
First posted
Dec 7, 2020
Registry last updated
Dec 9, 2020

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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