Caffeine vs. Carbohydrate Mouth Rinsing in Soccer

Summary

The present study evaluated the influence of carbohydrate mouth-rinsing (CHO-MR), caffeine mouth-rinsing (CAF-MR), and control-substance mouth rinses on Loughborough soccer passing test (LSPT) performance. The study participants were involved in a randomized, double-blind, repeated-measures design that employed four sessions (familiarization, CHOMR, CAFMR, and CONT) over ten days at a testing facility. Participants took part in six test sessions 72 hours apart. In the CHO group, 6% w/v glucose solution was used. In the CAFF group, 6% w/v glucose solution was used. CONT group, only exercise was performed without any condition.

Conditions

• Performance
• Soccer
• Caffeine and Carbohydrate
• Cognitive Function
• Technical Skill

Interventions

OTHER

Caffeine

Participants' solutions were prepared in separate Falcon Sterile Tubes: LSPTCAFF (1.2% w/v caffeine solution, Nature's Supreme). An MRI was performed before the LSPT. The solution was sweetened with non-caloric artificial sweeteners consisting of sucralose. The caffeine solution was prepared in an equivalent saccharin base and shaken for 30 seconds in a vortex mixer to ensure distinguishability. Participants swished the solution in their mouth for 10 seconds before LSPT and then emptied it back into the container to be weighed again. To ensure that the solutions were not swallowed, the containers were measured before and after all MRs using a full precision balance (Etekcity, USA) accurate to 1 g/0.04 oz.

OTHER

CHO

Participants' solutions were prepared in separate Falcon Sterile Tubes: LSPTCHO (6% w/ v glucose solution, Protein Ocean, Turkey) An MRI was performed prior to LSPT. The solution was sweetened with non-caloric artificial sweeteners consisting of sucralose. The CHO solution was prepared in an equivalent saccharin base and shaken for 30 seconds in a vortex mixer to ensure distinguishability. Participants swished the solution in their mouth for 10 seconds before LSPT and then emptied it back into the container to be weighed again. To ensure that the solutions were not swallowed, the containers were measured before and after all MRs using a full precision balance (Etekcity, USA) accurate to 1 g/0.04 oz.

OTHER

Control

For the control condition, no supplements were taken and only exercise was performed.

Sponsors & Collaborators

• Tokat Gaziosmanpasa University

  lead OTHER

Principal Investigators

• Ersan Arslan, Doctorate · +905325452848

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

TRIPLE

Model

CROSSOVER

Eligibility

Min Age

14 Years

Max Age

16 Years

Sex

MALE

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2025-02-10

Primary Completion

2025-02-25

Completion

2025-02-26

Countries

• Turkey (Türkiye)

Study Locations