The Physiological Responses to Low Coal Mining

The Physiological responses of male and female coal miners measured both above and below ground were studied to ascertain the characteristics and task demands of mining coal in very restricted surroundings (seam heights 48 inches or lower). Physical work capacity was estimated from expired air analysis and a stationary bicycle ergometer ride, while underground oxygen consumption was estimated from total ventilation using a Max Planck Respirometer. Results indicate that low coal miners do not possess higher maximum oxygen consumption values than non-mining populations but when working at the most demanding jobs in the mine workers function up to 66% of their maximum aerobic capacity. Individual task analysis for oxygen uptake and kilocalorie expenditure is discussed.