Not provided
| ID | Type | Description | Link |
|---|---|---|---|
| CEIP/2024/5/117 | Other Identifier | CEIP/2024/5/117 |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
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.
Introduction: Caffeine is widely recognized as a performance-enhancing substance across numerous athletic disciplines; however, its role in sport climbing has received comparatively limited scientific attention. Because climbing performance relies heavily on grip force, explosive upper-body strength, and localized muscular endurance, this investigation evaluated the short-term impact of a low caffeine dose on climbing-relevant performance outcomes.
Objective: 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.
Methods: Thirteen trained young male climbers participated in a triple-blind, randomized, crossover study design, completing two experimental conditions (caffeine and placebo). Performance assessments included a pull-up one-repetition maximum (1RM), a pull-up power test conducted at multiple external loads, a pull-up endurance test, and several grip performance evaluations, namely maximal dead-hang duration, maximal dead-hang force, and rate of force development (RFD).
Not provided
Not provided
Not provided
Not provided
| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Placebo | Placebo Comparator | 0 mg/kg of caffeine |
|
| Caffeine | Experimental | 3 mg/kg of caffeine |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Acute and moderate dose of caffeine (3 mg/kg body mass) | Dietary Supplement | Caffeine supplementation was provide to young male climbers. |
|
| Measure | Description | Time Frame |
|---|---|---|
| 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 |
| Measure | Description | Time Frame |
|---|---|---|
| Body composition | Using bioelectrical impedance | Through study completion, an average of 4 weeks |
| Dietary habits | 24 h dietary recall |
Not provided
Inclusion criteria:
Exclusion criteria:
Not provided
Not provided
Not provided
Not provided
Not provided
| Name | Affiliation | Role |
|---|---|---|
| Alberto PĂ©rez LĂłpez, PhD | University of Alcala | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Facultad de Medicina y Ciencias de la Salud. Universidad de Alcalá | Alcalá de Henares | Madrid | 28805 | Spain |
Not provided
Not provided
Not provided
Not provided
Not provided
Not provided
A triple-blind, randomized, placebo-controlled design
Not provided
Not provided
Participants, investigators and statistician
| Placebo | Dietary Supplement | Placebo supplementation was provide to young male climbers. |
|
| Through study completion, an average of 4 weeks |
| Physical activity habits | International Physical Activity Questionnaire (IPAQ). Report the unabbreviated scale title. Scores are typically expressed as MET-minutes/week or by activity categories (low, moderate, high), depending on the scoring protocol used. There is no fixed universal minimum or maximum score for MET-minutes/week, as scores depend on reported activity levels. Higher scores indicate better outcomes (greater physical activity). | Through study completion, an average of 4 weeks |
| Rate of perceived exertion | Using Rating of Perceived Exertion (RPE). Category Ratio 10 (CR10) Scale: minimum 0, maximum 10 (or 11 if including "maximal"). Higher scores indicate worse outcomes (greater perceived exertion). | Through study completion, an average of 4 weeks |
| Mood states | Using the Profile of Mood States (POMS) on a 0-4 scale. | Through study completion, an average of 4 weeks |