Water Talks - Elite Endurance Competition and Acute Dehydration: Field Observations from World Championships Tokyo 2025

Date: Wednesday, August 5, 2026
Time: 3:00 pm – 4:00 pm (Arizona and Pacific time)

This event will take place on Zoom.
Attendees will receive the Zoom link in a confirmation email after they have registered.

This presentation will highlight preliminary findings from a field-based study conducted during the World Athletics Championships Tokyo 2025, examining heat acclimatization practices, hydration behaviors, and sweat sodium losses among elite endurance athletes. Particular emphasis will be placed on the substantial interindividual variability observed in sweat sodium concentration and hydration status, and how these differences influence athlete preparation, recovery, and performance in hot environments. Practical implications for individualized heat and hydration strategies will be discussed.

Speaker: Yuri Hosokawa
Associate Professor at Waseda University, Japan
Director of the Safety and Performance Optimization Laboratory

Dr. Yuri Hosokawa is an Associate Professor at Waseda University and director of the Safety and Performance Optimization Laboratory. Her research focuses on athlete safety, with a strong emphasis on heat stress, hydration, and preventing exertional heat illness to optimize performance in challenging environments. Dr. Hosokawa collaborates globally to advance evidence-based strategies that protect athletes, workers, and tactical populations from heat-related risks. She serves on the Medical and Science Advisory Board of the Korey Stringer Institute and advises organizations including World Athletics, the Japan Coast Guard, and Sport Safety Japan, contributing to international guidelines and best practices in heat safety.

Contact Stavros Kavouras at stavros.kavouras@asu.edu with any questions.

Board of Certification
Arizona State University College of Health Solutions Hydration Science Lab (BOC AP#: P12229) is approved by the Board of Certification, Inc. to provide continuing education to Athletic Trainers (ATs). This program is eligible for a maximum of (1) Category A hour/CEU. ATs should claim only those hours actually spent in the educational program.

Commission on Dietetic Registration
Water Talks - Elite Endurance Competition and Acute Dehydration: Field Observations from World Championships Tokyo 2025 awards 1 CPEU in accordance with the Commission on Dietetic Registration’s CPEU Prior Approval Program.

American College of Sports Medicine
The American College of Sports Medicine’s Continuing Professional Education Committee certifies that the Arizona State University College of Health Solutions Hydration Science Lab’s Elite Endurance Competition and Acute Dehydration: Field Observations from World Championships Tokyo 2025 course (100041) meets the criteria for 1.0 official ACSM CECs from 7/20/2026 to 7/19/2027. The ACSM Education Provider approved course reflects the concepts of their respective organizations and does not necessarily represent the positions or policies of ACSM.

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Thank you for your interest in Water Talks - Elite Endurance Competition and Acute Dehydration: Field Observations from World Championships Tokyo 2025.

Registration has closed for this event.

For information or questions,

Contact Stavros Kavouras at stavros.kavouras@asu.edu with any questions.