Performance Enhancing Product UseNCT07412951
Effects of Caffeine and Shot Put Performance
A study testing caffeine in people with Performance Enhancing Product Use, run by National Taiwan Sport University at 1 site in Taiwan.
Trial summary
The aim of the study being to investigate the effects of caffeinated chewing gum on shot put performance Read more about this study
- Who is it for?
- Ages 20 to 40 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Performance Enhancing Product Use
- What is being tested?
- caffeine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 18 participants
- Where
- 1 siteTaiwan
- Study dates
- 1 Jan 2026to 26 Apr 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 40 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- activity athlete
- No cardiovascular and joint diseases
Who cannot join
- Non-active athlete
- Caffeine-sensitive individuals
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Effects of Caffeinated Chewing Gum on Shot Put Performance
The aim of the study being to investigate the effects of caffeinated chewing gum on shot put performance
Read the detailed description
15-20 active throwers who have received professional shot put training are expected to be recruited for the study. In a randomisation crossover design, the study was divided into caffeinated chewing gum trial (CCG) and placebo trail (PL). Participants wore a heart rate monitor to record their heart rate and heart rate variability during the experiment, and were given either a caffeinated chewing gum containing 3 mg/kg of body weight (CAP trial) or a placebo chewing gum, and rested for 15 minutes. After the warm-up, the athletic ability test and shot put performance were conducted in order. Saliva samples were collected for analysis of caffeine and α-amylase before and at the end of the experiment.
- Conditions
- Performance Enhancing Product Use
- Being tested
- caffeine
- Keywords
- power
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
caffeineDietary supplement
The participants chewing either caffeine Gum (CAF trial, containing 3 mg/kg of caffeine) or Placebo Gum (PL) for 10 minutes.
| Study group | Role | What they receive |
|---|---|---|
| caffeine gum | Experimental | Chewing caffeine gum for 10 minutes Receives: Dietary Supplement: caffeine |
| placebo gum | Placebo comparator | Chewing placebo gum for 10 minutes Receives: Dietary Supplement: caffeine |
What is being measured
The primary outcome is the main question the study is designed to answer.
shot put distance
Measurement of Shot Put Distance (meter)
Measured: 15 minutes after intervention
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted17 Feb 2026
- Study start1 Jan 2026
- Primary completion1 Apr 2026
- Study completion26 Apr 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Performance Enhancing Product UseStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind
- Who is masked
- Investigator
- Enrolment
- 18 participants (actual)
Sponsor and investigators
- Lead sponsor
- National Taiwan Sport University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Chih-Hui Chiu, National Taiwan Sport University
- Investigators
- Chih-Hui Chiu, Principal investigator, Sport Science Research Center
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07412951
- Sponsor's protocol ID
- 115-2
- Status last verified
- Apr 2026
- First submitted
- 6 Jan 2026
- Last updated
- 29 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 29 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Caffeinated Chewing Gum on Shot Put Performance
- ClinicalTrials.gov ID
- NCT07412951
- Acronym / sponsor ID
- 115-2
- Conditions
- Performance Enhancing Product Use
- Keywords
- power
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 18 participants (actual)
- Lead sponsor
- National Taiwan Sport UniversityUniversity, hospital or other
- Study start
- 1 Jan 2026 (actual)
- Primary completion
- 1 Apr 2026 (actual)
- Study completion
- 26 Apr 2026 (actual)
- First posted
- 17 Feb 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The aim of the study being to investigate the effects of caffeinated chewing gum on shot put performance
Detailed description
15-20 active throwers who have received professional shot put training are expected to be recruited for the study. In a randomisation crossover design, the study was divided into caffeinated chewing gum trial (CCG) and placebo trail (PL). Participants wore a heart rate monitor to record their heart rate and heart rate variability during the experiment, and were given either a caffeinated chewing gum containing 3 mg/kg of body weight (CAP trial) or a placebo chewing gum, and rested for 15 minutes. After the warm-up, the athletic ability test and shot put performance were conducted in order. Saliva samples were collected for analysis of caffeine and α-amylase before and at the end of the experiment.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Single blind (investigator)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| caffeine gum | Experimental | Dietary Supplement: caffeineChewing caffeine gum for 10 minutes |
| placebo gum | Placebo comparator | Dietary Supplement: caffeineChewing placebo gum for 10 minutes |
Who may qualify
- Ages
- 20 to 40 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (2 listed)
- activity athlete
- No cardiovascular and joint diseases
Key exclusion criteria (2 listed)
- Non-active athlete
- Caffeine-sensitive individuals
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| caffeineThe participants chewing either caffeine Gum (CAF trial, containing 3 mg/kg of caffeine) or Placebo Gum (PL) for 10 minutes. | Dietary supplement | caffeine gum, placebo gum |
Primary outcome
shot put distance
Time frame: 15 minutes after intervention
Measurement of Shot Put Distance (meter)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Apr 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Chih-Hui Chiu principal investigator
Sport Science Research Center
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing caffeine in people with Performance Enhancing Product Use, run by National Taiwan Sport University at 1 site in Taiwan.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Taiwan. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
shot put distance (time frame: 15 minutes after intervention). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Apr 2026.