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Energy expenditure in work with hole-diggers as related to some of the construction parameters of these machines

Summary

With a view of evaluating the quality of motor hole-diggers from the physiological point of view ealorimetric observations were made in the course of work with seven types of these machines. Hole-diggers with borers of various diameters (18–32 cm) and various construction were used. The weight of the hole-diggers together with the borers ranged from 20 to 47 kg. Observations were made in the case of 16 forest workers and technicians, viz. in turf grown soil and in tufless soil.

Judging from the energy expenditure per minute (3.7–7.3 kcal) the work with hole-diggers belongs to the category of moderate and middle physical strain. The quality of hole-diggers was evaluated according to the average calorie consumption per performance unit (kcal per 1 m of hole depth) which in the case of the various hole-diggers ranged within very broad limits (3.2 to 16.2 kcal in turfy soil and 2.3 to 8.3 kcal in turfless soil).

The authors thus have succeeded in differentiating the various machines as to quality from physiological point of view. It was found that energy expenditure per performance unit is influenced above all by the performance of the motor, the number of revolutions of borers per minute and the construction characteristics of the borer.

These observations were made with the technical cooperation of assistent J.Zohorsky.

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Literatur

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Hubač, M., Borský, I., Strelka, F. et al. Energy expenditure in work with hole-diggers as related to some of the construction parameters of these machines. Int. Z. Angew. Physiol. Einschl. Arbeitsphysiol. 19, 229–240 (1962). https://doi.org/10.1007/BF00697120

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Keywords

  • Energy Expenditure
  • Human Physiology
  • Sport Medicine
  • Performance Unit
  • Calorie Consumption