Über die Ökonomie der Maurerarbeit

Baader, E. W.; Lehmann, Günther

doi:10.1007/bf02010373

Cited by 3 publications

(3 citation statements)

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“…Indirect calorimetry was employed as an EC assessment method in a total of 44 studies as follows: 14 studies in agriculture22,23,24,25,26,27,28,29,30,31,32,33,34,35 ) , 5 studies in construction36,37,38,39,40 ) , 14 studies in manufacturing23, 41, 42,43,44,45,46,47,48,49,50,51 ) (some papers include more than one study), and 13 studies in transportation22, 52,53,54,55,56,57,58,59,60,61,62,63 ) . The heart rate monitoring method was used to assess workers’ EC in 10 studies as follows: one study in the tourism industry64 ) , seven studies in the manufacturing industry65,66,67,68,69,70,71 ) , and two studies in the transportation industry72, 73 ) .…”

Section: Resultsmentioning

confidence: 99%

“…This sector is divided into 3 NACE codes [Construction of buildings (F41); Civil engineering (F42); Specialized construction activities (F43)] corresponding to the job types assessed in 5 studies19,20,21,22,23 ) which monitored a total of 67 male workers. The EC is reported for many tasks including transporting concrete, cleaning up, removing panels, carrying, placing concrete, brick layering, loader operating, scaffolding, load carrying, mixing cement using shovel, tapping-chipping cement walls, shoveling sand, painting, and performing other miscellaneous earthworks19,20,21,22,23 ) . The EC data of all the aforementioned tasks appear in an Appendix.…”

Section: Tourism (Ie Accommodation and Food Services Activities) (I)mentioning

confidence: 99%

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Metabolic energy cost of workers in agriculture, construction, manufacturing, tourism, and transportation industries

2019

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The assessment of energy cost (EC) at the workplace remains a key topic in occupational health due to the ever-increasing prevalence of work-related issues. This review provides a detailed list of EC estimations in jobs/tasks included in tourism, agriculture, construction, manufacturing, and transportation industries. A total of 61 studies evaluated the EC of 1667 workers while performing a large number of tasks related to each one of the aforementioned five industries. Agriculture includes the most energy-demanding jobs (males: 6.0 ± 2.5 kcal/min; females: 2.9 ± 1.0 kcal/min). Jobs in the construction industry were the 2nd most demanding (males: 4.9 ± 1.6 kcal/min; no data for females). The industry with the 3rd highest EC estimate was manufacturing (males: 3.8 ± 1.1 kcal/min; females: 3.0 ± 1.3 kcal/min). Transportation presented relatively moderate EC estimates (males: 3.1 ± 1.0 kcal/min; no data for females). Tourism jobs demonstrated the lowest EC values (2.5 ± 0.9 kcal/min for males and females). It is hoped that this information will aid the development of future instruments and guidelines aiming to protect workers' health, safety, and productivity. Future research should provide updated EC estimates within a wide spectrum of occupational settings taking into account the sex, age, and physiological characteristics of the workers as well as the individual characteristics of each workplace.

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Section: Resultsmentioning

confidence: 99%

Section: Tourism (Ie Accommodation and Food Services Activities) (I)mentioning

confidence: 99%

Metabolic energy cost of workers in agriculture, construction, manufacturing, tourism, and transportation industries

2019

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“…The larger proportion of the cost due to static effort illustrates the tiring character of carrying work. In a study of bricklaying, Baader and Lehmann (1928) used this partial efficiency method of estimating the static factor, in order to arrive at the most convenient size of brick.…”

Section: The Static Factor In Dynamic Effortmentioning

confidence: 99%

The Influence of Static Effort on the Respiration and on the Respiratory Exchange

Bedford

Vernon

Warner

1933

J. Hyg.

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(1) The energy cost of static effort.From previous work it appears that the metabolic cost of maintaining a given tension varies directly as the load, provided no new muscles are brought into play as the result of fatigue or local strain. There is conflict of opinion as to the relation of cost to tension; some workers find a linear relation, while others find a non-linear one.In the present observations contractions, which were virtually isometric, were made against a powerful spring, while in a standing position.With constant tension the oxygen cost per contraction varied directly as the duration of the contraction. With constant time and increasing tension the oxygen cost increased more rapidly than the tension.The duration of contraction varied from ½ to 30 sec., and the tension from 30 to 165 Ib. Over the whole range the oxygen cost per contraction is adequately described by the equationQ = T1·37 (0·0117 + 0·01090t),where Q is the oxygen cost per contraction, T is the tension, and t is the duration of contraction.(2) The effect of static effort on the respiration.As a measure of hyper-ventilation the ratio of ventilation to oxygen intake is used. It is shown that in dynamic work this ratio falls below the resting value, whereas in static effort of whatever severity the ratio increases considerably above the resting value if the effort is sufficiently prolonged. The rise in the ventilation ratio runs parallel with the feelings of strain which are associated with static effort. Pain causes such a rise in the ratio, and the rise which occurs in static effort is ascribed to the influence of painful sensations of strain.Observations were made in which the posture alternated between sitting and standing every 40 sec. The change of posture altered the distribution of the strain, and thus the subjective sensations were not so marked as in the experiments with posture unchanged. In consequence of the postural change the ventilation ratio did not rise sensibly above the resting value, and the maximum strength of pull was increased by 6–16 per cent.

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Eine Untersuchung der optimalen Bedingungen beim Hammerschlag

Philippowitsch¹

1931

Arbeitsphysiologie

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Über die Ökonomie der Maurerarbeit

Cited by 3 publications

References 0 publications

Metabolic energy cost of workers in agriculture, construction, manufacturing, tourism, and transportation industries

Metabolic energy cost of workers in agriculture, construction, manufacturing, tourism, and transportation industries

The Influence of Static Effort on the Respiration and on the Respiratory Exchange

Eine Untersuchung der optimalen Bedingungen beim Hammerschlag

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