Effect of Ethnicity on Changes in VO2max and Cardiac Output in Response to Short-Term High Intensity Interval Training

June 24, 2020 updated by: Todd A. Astorino Ph.D, California State University, San Marcos
The purpose of this study was to determine if ethnicity alters training responsiveness to a low dose of high intensity interval training in inactive women.

Study Overview

Detailed Description

Prior to the session, women completed a 4-minute warmup at 10 % PPO. Each subject completed 9 sessions of HIIT over a 3-week period which consisted of eight to ten 1-minute bouts of cycling at 85% PPO with 75-second recovery between bouts at 10 % PPO. This protocol is well-tolerated in inactive individuals. Continuously during each session, heart rate was monitored using telemetry. On days 1, 3, 6, and 9 of training, the physical activity enjoyment scale (PACES) was completed. VO2max and cardiac output max were assessed prior to training, as well as post.

Study Type

Interventional

Enrollment (Actual)

22

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

    • California
      • San Marcos, California, United States, 92096
        • California State University San Marcos

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 45 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women
  • Between the age of 18-45
  • Healthy and non-obese (BMI < 30 kg/m2)
  • Perform less than 150 minutes per week of exercise in the last 12 months
  • 100% Caucasian or 100% Hispanic

Exclusion Criteria:

  • Injured
  • Obese
  • Active
  • Mixed ethnicity

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Non-Randomized
  • Interventional Model: Sequential Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Caucasian
Participants performed 9 sessions of HIIT over 3 weeks, utilizing progressive overload by increasing the number of bouts by 1 each week. They started with 8 bouts on week 1, 9 bouts on week 2, and 10 bouts on week 3.
Repeated, brief, and intense exercise bouts separated by active recovery
Experimental: Hispanic
Participants performed 9 sessions of HIIT over 3 weeks, utilizing progressive overload by increasing the number of bouts by 1 each week. They started with 8 bouts on week 1, 9 bouts on week 2, and 10 bouts on week 3.
Repeated, brief, and intense exercise bouts separated by active recovery

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in baseline in VO2max at 3 weeks
Time Frame: 3 weeks
Each participant performed VO2max testing on an electronically-braked cycle ergometer using a ramp protocol. During exercise, subjects expired through a plastic mouthpiece and low resistance valve into tubing connected to a mixing chamber. Measures of ventilation and expired fractions of oxygen and carbon dioxide were obtained throughout exercise by a metabolic cart. Gas exchange data including VO2, VCO2, and ventilation were time-averaged every 15 seconds. The test was terminated when the subject's pedal cadence was below 50 rev/min.
3 weeks
Change in baseline in cardiac output max at 3 weeks
Time Frame: 3 weeks
During the VO2max assessment, participants wore a thoracic impedance device to measure heart rate and stroke volume, calculating their cardiac output.
3 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Principal Investigator: Todd Astorino, PhD, California State University, San Marcos

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 1, 2017

Primary Completion (Actual)

December 22, 2019

Study Completion (Actual)

March 23, 2020

Study Registration Dates

First Submitted

June 24, 2020

First Submitted That Met QC Criteria

June 24, 2020

First Posted (Actual)

June 26, 2020

Study Record Updates

Last Update Posted (Actual)

June 26, 2020

Last Update Submitted That Met QC Criteria

June 24, 2020

Last Verified

June 1, 2020

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 1200680-2

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Undecided

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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