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IRCT20251112067968N1 IRCT 2025-12-25 Islamic Azad University Effectiveness of Cooling Strategies (Neck Cooling and Menthol Mouth Rinse) on Thermo-Perceptual and Physiological Responses in Hijab-Wearing Female Futsal Players Effectiveness of Cooling Strategies (Neck Cooling and Menthol Mouth Rinse) on Thermo-Perceptual and Physiological Responses in Hijab-Wearing Female Futsal Players 2025-12-31 anticipated 20 Complete https://irct.ir/trial/87477 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Used, Assignment: Crossover, Purpose: Health service research, Other design features: Quasi-experimental crossover trial with repeated measures and a 2×2 factorial structure, in which each participant completes four conditions: menthol mouth rinse (MEN), neck cooling (NEC), combined (MEN+NEC), and control (CON). The order of conditions is determined by block randomization, with at least 72 hours between sessions. The protocol is conducted in an indoor futsal hall under controlled hot-dry conditions (34±1°C, 20–30% RH), Randomization description: This study employed a randomized, counterbalanced crossover design. To determine the order of participation in the four intervention conditions, including menthol MEN, NEC, MEN+NEC, and control, the intervention sequences were randomly and counterbalanced using a Latin-square design, ensuring that each condition was equally distributed across different time positions to minimize order and period effects. The intervention sequences were generated by an independent researcher prior to the start of the study, and allocation was concealed using sealed, opaque envelopes. N/A Exercise in heat condition. Intervention 1: First group: Menthol Mouth Rinse (MEN): Rinsing with 25 mL of 0.1% L-Menthol solution for 10 seconds and then expectorating. Intervention 2: Second group: Neck Cooling (NEC): Application of a phase-change material (PCM) cooling pack (initial temperature approximately 2-4°C) to the neck area. Intervention 3: Intervention group: Third Intervention (MEN+NEC): Simultaneous application of both the menthol mouth rinse and the neck cooling. Intervention 4: Control group: Placebo mouth rinse (non-menthol solution with similar taste) and application of a non-cooling neck pack. Yes - There is a plan to make this available What will be shared: All data without participant names When: 6 months after publication of the article To whom: University students and professors Conditions: For future research Where to obtain: To the researchers of this study How to obtain: By email to researchers Comments:
public Akram Jafari
Shahrekord, Islamic Azad University, Shahrekord Branch
Shahrekord Iran (Islamic Republic of) 881863003 +98 38 3336 1001 Jafari.akm@gmail.com Islamic Azad University scientific Akram Jafari
No. 10, Alley 75, Bahonar Street, Shahrekord
Shahrekord Iran (Islamic Republic of) 881863003 +98 38 3336 1001 Jafari.akm@gmail.com Islamic Azad University Iran (Islamic Republic of) Female sex Age range of 18 to 30 Years Minimum of two years of regular futsal training experience Consistent use of sports hijab during training and competitions General health confirmed by a sports medicine physician 18 years 30 years Female Intolerance to menthol mouth rinse or occurrence of skin irritation from neck cooling Suffering from an acute illness during the research execution period Failure to complete at least one test session Use of medications affecting the cardiovascular, respiratory, or thermoregulatory systems Other Other Other Other First group: Menthol Mouth Rinse (MEN): Rinsing with 25 mL of 0.1% L-Menthol solution for 10 seconds and then expectorating. Second group: Neck Cooling (NEC): Application of a phase-change material (PCM) cooling pack (initial temperature approximately 2-4°C) to the neck area. Intervention group: Third Intervention (MEN+NEC): Simultaneous application of both the menthol mouth rinse and the neck cooling. Control group: Placebo mouth rinse (non-menthol solution with similar taste) and application of a non-cooling neck pack. Best sprint time. Timepoint: Calculated post-protocol after data collection. Method of measurement: Calculated using a standard formula based on the sprint times recorded across the 10 repetitions. Performance Decrement Index. Timepoint: Upon the completion of the protocol and the collection of all temporal data. Method of measurement: Statistical analysis was performed using the standardized performance decrement formula, derived from the recorded times across 10 sprint repetitions. Skin Temperature. Timepoint: Pre, during, and post-activity phases. Method of measurement: Measured using skin thermistors placed on specific body sites. Heart Rate. Timepoint: With smartwatch-integrated sensors. Method of measurement: Longitudinal monitoring across the pre-, intra-, and post-activity phases. Sweat Rate & Body Mass Loss. Timepoint: Body weight measured immediately before the protocol and immediately after completion. Method of measurement: Calculated by comparing pre- and post-activity body weight (without fluid intake during the test). Rating of Perceived Exertion. Timepoint: After the exercise protocol. Method of measurement: Measured using the Borg Scale (range 6–20). Thermal Sensation & Thermal Comfort. Timepoint: Before, during, and after the exercise protocol. Method of measurement: Measured via standardized thermal sensation and comfort questionnaires. Islamic Azad University Approved 2025-12-20 Islamic Azad University, Shahrekord Branch No. 10, 75th Alley, Ba Honar Street, Shahrekord Shahrekord Chahar-Mahal-va-Bakhtiari Iran (Islamic Republic of)