NCT07340996

Brief Summary

The purpose of this study is to investigate whether β-caryophyllene supplementation can enhance the static apnea capacity of freedivers.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
15

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Jan 2026

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

January 6, 2026

Completed
8 days until next milestone

First Posted

Study publicly available on registry

January 14, 2026

Completed
1 day until next milestone

Study Start

First participant enrolled

January 15, 2026

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2026

Completed
25 days until next milestone

Study Completion

Last participant's last visit for all outcomes

April 26, 2026

Completed
Last Updated

April 29, 2026

Status Verified

April 1, 2026

Enrollment Period

3 months

First QC Date

January 6, 2026

Last Update Submit

April 27, 2026

Conditions

EXERCISE PERFORMANCE

Keywords

freediving

Outcome Measures

Primary Outcomes (1)

  • Breath-hold duration

    Measure the duration of static breath-holding

    30 minutes after intervention

Study Arms (2)

intervention

EXPERIMENTAL

supplementation β-caryophyllene

Dietary Supplement: interventionsDietary Supplement: Placebo

placebo

PLACEBO COMPARATOR

placebo

Dietary Supplement: interventionsDietary Supplement: Placebo

Interventions

interventionsDIETARY_SUPPLEMENT

supplementation of β-caryophyllene

interventionplacebo
PlaceboDIETARY_SUPPLEMENT

Participants consumed placebo capsules (PLA trial)

interventionplacebo

Eligibility Criteria

Age20 Years - 40 Years
Sexmale(Gender-based eligibility)
Gender Eligibility DetailsOnly male subjects
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • With over 3 years of freediving experience

You may not qualify if:

  • Without over 3 years of freediving experience

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

National Taiwan University of Sport

Taichung, Taiwan

Location

MeSH Terms

Interventions

Methods

Intervention Hierarchy (Ancestors)

Investigative Techniques

Study Officials

  • Chih Hui Chiu

    National Taiwan University of Sport

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
SINGLE
Who Masked
INVESTIGATOR
Masking Details
placebo
Purpose
TREATMENT
Intervention Model
CROSSOVER
Model Details: randomized crossover design with double-blind methodology
Sponsor Type
OTHER
Responsible Party
SPONSOR INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

January 6, 2026

First Posted

January 14, 2026

Study Start

January 15, 2026

Primary Completion

April 1, 2026

Study Completion

April 26, 2026

Last Updated

April 29, 2026

Record last verified: 2026-04

Data Sharing

IPD Sharing
Will not share

Locations

TW(1)