Caffeine
Conditions
Brief summary
The purpose of this study was to investigate the effects of caffeinated chewing gum on female softball pitching and hitting performance. 24 trained female softball players (10 pitchers and 14 fielders) were divided into a caffeine chewing gum trial (CAF) or a placebo trial (PLA) in a single-blind, randomized, crossover experimental design. Two pieces of gum containing 100 mg of caffeine (CAF) or without caffeine (PLA) were chewed for 10 minutes and then spit out, followed by a 15-minute warm-up. The physical tests included grip strength and countermovement jump. The softball-specific tests included pitching (fast ball speed) or hitting (exit speed). The two trials were separated by seven days.
Detailed description
This study utilized a randomized, crossover, single-blind experimental design. At least two familiarization tests were conducted one week before the formal trial to ensure each participant was familiar with the experimental procedures. Before the first formal trial, participants were randomly assigned to either the caffeinated chewing gum trial (CAF) with 200 mg of caffeine or the placebo trial (PLA) without caffeine, seven days apart (Figure 1). The primary outcome was the pitching and hitting performance, and the secondary outcomes were hand grip strength and height of countermovement jump.
Interventions
OTHERCAFFEINE GUM
Observing the effect of chewing gum on the performance of female softball players.
Sponsors
Chih-Hui Chiu
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
SINGLE (Investigator)
Eligibility
Sex/Gender
FEMALE
Age
20 Years to 30 Years
Healthy volunteers
Yes
Inclusion criteria
* 1\. adult female; 2. at least six years of professional softball training and familiarity with all softball skills; 3. caffeine intake of less than 80 mg daily.
Exclusion criteria
* 1\. not professionally trained; 2. having a medical condition for which exercise is not recommended, such as hypertension, hyperlipidemia, or heart disease; 3. having any musculoskeletal injuries within the last six months or not being able to complete a full trial; 4. having a history of caffeine allergy.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| pitching performance | 15 min after intervention | Throw 10 fastballs |
| batting performance | 15 min after intervention | Hit 15 balls |
Countries
Taiwan
Outcome results
None listed