Fluid Intake and Hydration Status of Forest Workers -- A Preliminary Investigation
Authors
Graham Bates
Curtin University, Australia
Richard Parker
Centre for Human Factors and Ergonomics, New Zealand
Liz Ashby
Centre for Human Factors and Ergonomics, New Zealand
Tim Bentley
Centre for Human Factors and Ergonomics, New Zealand
Abstract
Dehydration and its milder form hypohydration have both short term and long term health effects. In the short term poor, body hydration impairs cognitive performance, physical strength and aerobic power, rendering the worker prone to injury and heat illness. In the long term the potential consequences of hypohydration are kidney stones and bladder cancer. The aim of this study was to evaluate hydration status of forest workers in New Zealand and their preferred fluid replacement. The specific gravity (sg) of urine was used as an indicator of body fluid status. In addition daily fluid loss was compared with a tested algorithm of sweat rate to better understand if workers are hydrating at the desired rate. The results of this preliminary study clearly demonstrate that loggers are working at sub-optimal hydration levels and are consuming inappropriate fluids to replace sweat losses. The hypohydrated state of these workers may pose both an immediate and long term health and safety risk.
