Fluid intake at work in foresters working in different thermal conditions

Area of Science:

• Occupational Health
• Environmental Physiology
• Sports Science

Background:

• Workplace hydration is critical for maintaining physiological function and preventing heat-related illnesses.
• Understanding fluid intake patterns and their impact on hydration indices is essential for worker well-being.
• Previous research has explored hydration in various occupational settings, but seasonal variations in fluid choices require further investigation.

Purpose of the Study:

• To evaluate the effect of fluid consumption on hydration status indicators in male workers.
• To identify the types of beverages consumed by workers under different thermal conditions.
• To establish correlations between fluid intake, hydration markers, and seasonal changes.

Main Methods:

• Fifty-nine male foresters participated in the study across summer, autumn, and winter.
• Urine and blood samples were collected pre- and post-work to assess hydration status.
• Fluid intake was quantified using post-shift questionnaires, and beverage preferences were recorded.

Main Results:

• Higher fluid intake was significantly associated with decreased urine specific gravity (r = -0.385) and urine osmolality (r = -0.405).
• A significant seasonal difference in fluid preference was observed, with tea consumption being higher in winter (68%) compared to summer (32%) (p = 0.026).
• Beverage choices varied with ambient temperature, indicating an adaptive response to thermal conditions.

Conclusions:

• Fluid intake directly influences hydration status markers in male workers.
• Seasonal factors impact beverage selection, suggesting a need for context-specific hydration strategies.
• Individualized fluid replacement plans are recommended to optimize worker hydration and performance.