{'fraction_non_alphanumeric': 0.036211699164345405, 'fraction_numerical': 0.017641597028783658, 'mean_word_length': 4.673684210526316, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
The effects of heat stress on manual handling tasks.

The purpose of this study was to determine the extent to which workers compensate for heat stress by reducing their work load. Sixteen male industrial workers performed lifting, pushing, and carrying tasks in a comfortable environment (WBGT 17.2°C) and in a heat-stressing environment (WBGT 27.0°C). A psychophystcal methodology was used whereby the workers controlled their own work load by adjusting the frequency of the task or the weight of the object being handled. The hot environment significantly reduced work load, and significantly increased heart rate and rectal temperature. Work load was reduced 20% for lifting, 16% for pushing, and 11% for carrying. Heart rate responded with a consistent 9- to 10-beat/ min rise for all three tasks, and rectal temperature rose from 0.2°C to 0.3°C. It was concluded that, when unacclimatized man manually handles materials at his own pace, he compensates for increases in heat stress by reducing his work load. Furthermore, the amount that man reduces his work load appea...