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Completed

NCT Number: NCT05719571

Measurement of Maximal Oxygen Uptake (VO2max) Using Mankato Submaximal Exercise Test in Young Adults

* To measure the maximal oxygen uptake (VO2max) using Mankato Submaximal Exercise test. * To correlate 'true' VO2max with Modified Bruce protocol and Mankato Submaximal Exercise Test.

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Key information

Conditions

Healthy

Age range

18 year–35 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Railway General Hospital, Pakistan

Rawalpindi, Punjab Province, 46000, Pakistan

About this study

First of all, 'true' VO2max of all subjects was calculated using non-exercise regression equation and one mile walk test. Variables used for the VO2max regression equation included BMI, age (years), gender (Male=1, Female=0) and physical activity rating scale. On the same visit, the subjects also performed one mile walk test. After the completion of test, pulse rate of subjects was calculated in beats per minute. The VO2max after the test was measured using the VO2max aerobic capacity calculator. Variables required were age, gender, weight, total time taken to complete test and pulse rate at test completion.

'True' VO2max accepted was the highest value obtained from non-exercise regression equation and one mile walk test On the 2nd visit, the participants performed Modified Bruce Submaximal Exercise test depending upon their fitness level and Mankato Submaximal Exercise test in counter balanced order with 30 minutes rest in between

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

  • Male and female aged between 18-35 years
  • Individuals with normal BMI i.e. 18.5-24.9
  • Individuals with positive cardiovascular family history

Exclusion criteria

  • Subjects with any known cardiovascular & pulmonary disease
  • Subjects addicted to caffeine/ smoking
  • Subjects with any neuromuscular disability/deformity

Treatment and study plan

Primary outcomes

  1. PAR Scale

    Time frame: 1 Day

    PAR scale is a self reported physical activity rating scale used for a healthy population. It describes the physical activity level of an individual from the last 6 months. It consists of scale from 0-15.

  2. Pulse Rate

    Time frame: 1 Day

    Beat per minute it is measured through Pulse Oximeter

  3. Oxygen Saturation

    Time frame: 1 Day

    It is measured in percentage of Oxygen in tissue, measured through Pulse oximeter

  4. One Mile Walk Test

    Time frame: 1 Day

    One mile walk test is also termed as Rockport Fitness Walking Test. The subject walk distance of 1 mile and take record of the time took to cover that distance. The subject's pulse rate is taken after the completion of test by pulse oximeter

  5. VO2max Aerobic Capacity Calculator

    Time frame: 1 Day

    VO2max aerobic capacity calculator is an online calculator used to measure VO2max. It calculates VO2max using the four most common methods which include, VO2max based on resting heart rate, VO2max based on one mile walk test, VO2max based on three minute step test and VO2max based on 1.5 mile walk or run test

  6. Non-Exercise Regression Equation

    Time frame: 1 Day

    Non-exercise regression equation is used for measuring VO2max based on non-exercise data. The variables required for the following equation are PAR scale, age, BMI and gender.

    VO2max (ml/kg/min) = 56.363 + 1.921 × PAR - 0.381 × Age - 0.754 × BMI + 10.987 × Gender

  7. Metabolic Equations

    Time frame: 1 Day

    ACSM metabolic equations are used for measuring VO2max. These metabolic equations are mentioned in ACSM's Guidelines for Exercise Testing and Prescription 2018. Following metabolic equations are used:

    • Speak (m.min-1) = (VO2max - 3.5) ∕0.2
    • Running VO2max (ml/kg/min) = (0.1 × speed) + (1.8 × speed × grade) + 3.5
    • Walking VO2max (ml/kg/min) = (0.2 × speed) + (0.9 × speed × grade) + 3.5

  8. Modified Bruce protocol

    Time frame: 1 Day

    Modified Bruce protocol is a treadmill protocol and modified form of Bruce protocol with decreased increment in initial stages and then increasing the slope progressively. Following are the Modified Bruce protocol stages:

    Stage 0 = 1.7 mph at 0% Grade Stage 0.5 = 1.7 mph at 5% Grade Stage 1 = 1.7 mph at 10% Grade Stage 2 = 2.5 mph at 12% Grade Stage 3 = 3.4 mph at 14% Grade Stage 4 = 4.2 mph at 16% Grade Stage 5 = 5.0 mph at 18% Grade Stage 6 = 5.5 mph at 20% Grade Stage 7 = 6.0 mph at 22% Grade Stage 8 = 6.5 mph at 24% Grade

Sponsors and collaborators

Lead sponsor

Riphah International University

Other

Registry information

Important dates

Study start
2020
Primary completion
2020
Study completion
2020
First posted
Feb 9, 2023
Registry last updated
Feb 9, 2023

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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