Trial · NCT07889661
Caffeine and Wrestling Performance in Male Wrestlers of Different Weight Classes: A Randomized Crossover Trial
NCT07889661, Not applicable, Completed, Islamic Azad University, Abadan Branch
3 sourcestrials-2026-11-12-0.5.0
Cite this record
ConductScience Library. Caffeine and Wrestling Performance in Male Wrestlers of Different Weight Classes: A Randomized Crossover Trial. Trials, record NCT07889661. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT07889661
On this page
Trial
As registered on ClinicalTrials.gov, in the graph's capture of the registry.
- Title
- Caffeine and Wrestling Performance in Male Wrestlers of Different Weight Classes: A Randomized Crossover Trial
- NCT number
- NCT07889661
- Status
- Completed
- Phases
- Not applicable
- Enrollment
- 95 participants, actual
- Lead sponsor
- Islamic Azad University, Abadan Branch
- Conditions
- Athletic Performance, Caffeine, Wrestling
- Interventions
- Caffeine
- First posted
- 2026-10-22
- Last updated
- 2026-10-22
Source ClinicalTrials.gov
Registered outcomes7
Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.
| List | Outcome | Time frame | Description |
|---|---|---|---|
| Primary | Total number of throws (Tn) | Measured during each experimental session, 60 minutes after supplementation. | Total number of successful throws completed across the three active periods of the Special Wrestling Fitness Test (SWFT). A throw was considered correct only when it satisfied the technical scoring criteria of United World Wrestling. Three independent assessors counted the throws, with discrepancies resolved through discussion. |
| Primary | Performance Index (PI) | Measured during each experimental session, 60 minutes after supplementation. | A wrestling-specific performance index calculated as (HR0 + HR1) / Tn, where HR0 is heart rate immediately after the SWFT and HR1 is heart rate 1 minute after the SWFT. A lower performance-index value indicates a greater number of throws relative to the recorded cardiac response. |
| Secondary | Body-mass-normalized throws (TnW) | Measured during each experimental session, 60 minutes after supplementation. | Total number of throws normalized to body weight, calculated as Tn divided by body weight in kilograms (TnW = Tn / body weight). This outcome reflects wrestling-specific work relative to body weight and has shown strong predictive validity for wrestling performance. |
| Secondary | Countermovement jump performance | 60 minutes after supplementation, before the Special Wrestling Fitness Test (SWFT). | Lower-body explosive power assessed using the Sargent vertical jump test (wall-mounted reach method). Participants performed three maximal countermovement jumps with 60 s passive recovery between attempts. Jump height (cm) was calculated as the difference between standing reach and maximal jump reach. The highest value was retained for analysis. |
| Secondary | Rating of perceived exertion (RPE) | Immediately after the SWFT. | Overall perceived exertion during the SWFT, assessed using the 10-point Borg scale immediately after the test. |
| Secondary | Self-reported symptoms on the test day | Immediately after each testing session (test day). | Presence or absence of negative symptoms assessed using an adapted QUEST checklist: anxiety, headache, dizziness, nervousness, irritability, tachycardia, abdominal discomfort, increased urine output, muscle soreness, and fatigue. Each item recorded dichotomously (yes/no). Vigor/activeness was treated separately as a positive self-reported effect and excluded from the adverse-symptom composite. |
| Secondary | Self-reported symptoms on the following day | 24 hours after each testing session. | Presence or absence of negative symptoms including insomnia, assessed 24 hours after each testing session using the same adapted QUEST checklist. |
Source ClinicalTrials.gov
Outcomes0
Each outcome the trial posted results for, in ClinicalTrials.gov's words.
None in this release.
Results by group0
Each measurement the trial posted, group by group, in the words and numbers it posted.
None in this release.
Participant flow0
How many started, completed or left each group, period by period.
None in this release.
Adverse events0
Each adverse event the trial posted, group by group: the participants affected out of those at risk.
None in this release.
Adverse event totals0
The totals the trial posted for each group.
None in this release.
Papers0
The papers the trial lists on ClinicalTrials.gov.
None in this release.
Grants0
The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.
None in this release.
Trial comparisons0
Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.
None in this release.
Tests0
The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.
None in this release.
Data dates
The day each source was copied for this release.
Sources 3
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
- NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
- ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
- ClinicalTrials.govnone stated
- NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.
For software
Read this trial from software.
The record and each of its lists are JSON, twenty rows a page. No key.
GET https://conductscience.org/api/trials/v1/NCT07889661
GET https://conductscience.org/api/trials/v1/NCT07889661/registered