Estimation of VO2Max Using Smartphone Application

Not yet recruiting

• Conditions: Assessmet of VO2max in Elderly

• Registration Number: NCT06575608
• Lead Sponsor: Cairo University

Brief Summary

The aim of this observational study Is to examine the validity of the Smartphone application (VO2max calculator) in calculating VO2max in elderly population.

Research hypotheses:

this study will test the following null hypothesis: (Vo2max calculator) application will not have criterion validity in estimating VO2max values in the elderly population.

Research question:

Is the Smartphone application (VO2max calculator) considered a valid tool for estimating accurate values of VO2max in the elderly population in comparison to the golden standard method?

Detailed Description

Although maximal oxygen consumption (VO2max) is growing in evidence as a powerful indicator of several health conditions it's rarely used in clinical practice due to the high expense, requirement of specialized equipment, and related risks of maximal exertion. So, we aim to develop a simpler method for estimating VO2max using modern smartphone technologies.

Method: participants of this study will be divided into 2 equal groups. The first group will perform a gold standard treadmill-based VO2max measurement and the other group will perform a smartphone based 1-mile walk test for VO2max estimation.

Study Timeline

• Status Verified: 2024-08
• Study First Submitted: 2024-08-22
• Study First Submitted QC: 2024-08-26
• Study First Posted: 2024-08-28
• Last Update Submitted: 2025-02-27
• Last Update Posted: 2025-03-03
• Study Start: 2025-05
• Primary Completion: 2025-09
• Study Completion: 2025-12

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: All
• Target Recruitment: 52

Inclusion Criteria

• Elderly subjects aged from (65 to 75) years.
• BMI 18.5-29.9 kg/m2
• Answer (NO) to all of the questions in the Physical activity readiness questionnaire (PAR-Q)
• Do not have any absolute or relative contraindications for exercise testing according to the American Heart Association (AHA) statement.

Exclusion Criteria

• Recent surgical conditions.
• Skeletal deformities.
• Blood pressure regulating medication intake.
• Any respiratory disorders.
• Back, hip, knee or ankle pain within last month.
• Any neurological or psychiatric conditions.
• Implanted pacemaker.
• Anemic patients.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
maximum oxygen consumption (VO2MAX)	at the peak of exercise (peak VO2) over the final 30 seconds of exercise	The greatest amount of oxygen a person can take in from inspired air while performing dynamic exercise involving a large part of total muscle mass.

Secondary Outcome Measures

Name	Time	Method
The Borg rating of perceived exertion (RPE) scale	at baseline one shot	It is a subjective scale for estimating effort and exertion, breathlessness, and fatigue during physical work.
Heart rate (HR)	at baseline one shot	the number of times your heart beats per minute.