Caffeine and Sport Climbing Performance

NCT07333443 | Completed

• 1 other identifier: CEIP/2024/5/117
• Study Type: interventional
• Target: 13
• Locations: 1 country
• Sites: 1

Brief Summary

To determine the effects of ingesting caffeine at a dose of 3 mg/kg body mass on pull-up performance and handgrip-related measures in trained climbers.

Conditions

Climbing; Caffeine

Keywords

sport climbing; grip strength; pull up strength; caffeine; sport performance

Outcome Measures

Primary Outcomes (7)

• Pull-up 1RM

  Through study completion, an average of 4 weeks

• Pull-up strength and power test 1

  Mean and peak velocity will be recorded at 60%, 80%, 90%, 95% and 100% 1RM.

  Through study completion, an average of 4 weeks

• Pull-up strength and power test 2

  Mean and peak power will be recorded at 60%, 80%, 90%, 95% and 100%1RM.

  Through study completion, an average of 4 weeks

• Pull-up muscular endurance test

  Using body mass and perform one set of many repetitions as possible until task failure. The total number of repetitions, Vmean, Vpeak, Wmean and Wpeak were recorded.

  Through study completion, an average of 4 weeks

• Grip endurance in dead-hang.

  Maximum hanging time (MHT) test at an 18-mm edge depth with each hand

  Through study completion, an average of 4 weeks

• Maximum grip strength in dead-hang

  using the Strength Test (ST), which measures the maximal external load a participant can sustain for 5 seconds while hanging from an 18-mm edge

  Through study completion, an average of 4 weeks

• Grip rate of force development (RFD).

  measuring the maximal one-hand pull (voluntary contraction) at an 18 mm edge with a force sensor

  Through study completion, an average of 4 weeks

Secondary Outcomes (5)

• Body composition

  Through study completion, an average of 4 weeks

• Dietary habits

  Through study completion, an average of 4 weeks

• Physical activity habits

  Through study completion, an average of 4 weeks

• Rate of perceived exertion

  Through study completion, an average of 4 weeks

• Mood states

  Through study completion, an average of 4 weeks

Study Arms (2)

Placebo

PLACEBO COMPARATOR

0 mg/kg of caffeine

Dietary Supplement: Placebo

Caffeine

EXPERIMENTAL

3 mg/kg of caffeine

Dietary Supplement: Acute and moderate dose of caffeine (3 mg/kg body mass)

Interventions

Acute and moderate dose of caffeine (3 mg/kg body mass) DIETARY_SUPPLEMENT

Caffeine supplementation was provide to young male climbers.

Caffeine

Placebo DIETARY_SUPPLEMENT

Placebo supplementation was provide to young male climbers.

Placebo

Eligibility Criteria

• Age: 18 Years - 35 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• Healthy individuals
• Age between 18 and 40 years
• At least three months of continuous climbing practice
• Ability to hang for at least 5 seconds from an 18-mm edge
• Ability to perform at least one strict body-weight pull-up

You may not qualify if:

• Any musculoskeletal or medical condition preventing completion of the experimental protocol
• Participation in less than three training sessions per week or a total training volume \<150 min/week
• Use of medications or dietary supplements known to affect caffeine metabolism

Sponsors & Collaborators

• University of Alcala: lead

Study Sites (1)

Facultad de Medicina y Ciencias de la Salud. Universidad de Alcalá

Alcalá de Henares, Madrid, 28805, Spain

Location

Study Officials

• Alberto Pérez López, PhD

  University of Alcala

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Masking Details: Participants, investigators and statistician
• Purpose: TREATMENT
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator

Model Details: A triple-blind, randomized, placebo-controlled design

Study Record Dates

• First Submitted: December 15, 2025
• First Posted: January 12, 2026
• Study Start: January 8, 2025
• Primary Completion: March 30, 2025
• Study Completion: October 30, 2025
• Last Updated: May 6, 2026

Record last verified: 2025-12

Data Sharing

• IPD Sharing: Will share

Locations

ES (1)