# Hydration of Workers in Thermal Environments—Practical Recommendation

## TL;DR

This paper discusses the importance of proper hydration for workers in both hot and cold environments and provides practical recommendations for maintaining hydration.

## Contribution

The paper emphasizes individualized hydration plans and updates hydration recommendations based on environmental conditions.

## Key findings

- Workers should drink 150–250 mL of chilled water every 15–20 min in hot environments.
- Warm beverages are recommended in cold environments to maintain hydration.
- Individual hydration plans are preferred over a one-size-fits-all approach.

## Abstract

The importance of proper hydration for work performance in hot climates is well known, as opposed to its role in cold climates. Workers’ water requirements may be high in both cold and hot environments, and the effects of dehydration can be a serious problem in either case. The National Institute for Occupational Safety and Health (NIOSH) and the Occupational Safety and Health Administration (OSHA) recommend that workers drink small amounts (150–250 mL at once) of chilled water (especially in hot environments) or warm beverages (especially in cold environments) every 15–20 min (before they become thirsty) to stay well hydrated. However, individual hydration plans are now more preferred, as no single recommendation is suitable for everyone. Workers should stay hydrated before, during, and after work. The article presents the importance of adequate hydration of workers as well as some recommendations for fluid intake in the workplace.