An intervention study to investigate the validity of a new evaluation method for cardiorespiratory fitness

An intervention study to investigate the validity of a new CRF evaluation method developed by the J-NIOSH - Validation study for a new CRF evaluation method

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000041031

Enrollment

Registered

2020-07-10

Start date

2020-07-10

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy adults

Interventions

4-week high-intensity interval exercise training (3 times/week) followed by 4-week non-exercise period

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Without exercise habit / Without high fitness level (roughly 45 ml/kg/min or less of VO2max)

Exclusion criteria

Exclusion criteria: With history of heart or brain disease / With medical conditions that could affect high-intensity exercises / Observed high-risk arrhythmia during exercise test

Design outcomes

Primary

Measure	Time frame
Measured VO2max (pre-intervention, middle-intervention, post-intervention)	—

Secondary

Measure	Time frame
Predicted VO2max (pre-intervention, middle-intervention, post-intervention)	—

Countries

Japan

Contacts

Public ContactTomoaki Matsuo

National Institute of Occupational Safety and Health, Japan Ergonomics Research Group

matsuo@h.jniosh.johas.go.jp044-865-6111

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026