The compendium lists 605 specific activities. It is assigned a valued with 1 MET (4184 kJ/kg body weight/h). This compendium takes the metabolic rate obtained during quiet sitting down (resting period) as the standard metabolic rate. field tests) but were mostly carried out in standardised settings.Įnergy expenditure is also the basis of the compendium of physical activities as compiled by Ainsworth et al. The measurements did not exclusively monitor conditions at the actual workplace (i.e. Oxygen uptake (V’O2 in L/min) was determined as the central measured parameter, providing energy consumption (in kcal) via the caloric equivalent. In order to gain better and more concrete information as well as numeric values for performance demands, studies on energy consumption in diverse professional sectors were carried out in the 1950s and 1960s. This classification dates back to the 1920s and 1930s and primarily relates to carrying and holding work with emphasis placed on different physical positions. It has four gradings: “light”, “light to moderate”, “moderate” and “hard”. In Germany, physical workload is estimated according to the REFA-classification (REFA: Reichsausschuß für Arbeitszeitermittlung, now known as Verband für Arbeitsgestaltung, Betriebsorganisation und Unternehmensentwicklung e. V.). How high is this person’s physical capacity? It should be kept in mind that usual conditions and not peak performances are involved. ![]() How great are the physical demands caused by the work? ![]() The performance demand (load) should be reflected against the performance ability (capacity), leading to the concept of “load to capacity”. As part of the bio-psycho-social context the clinician needs to assess the physical capability of the person to perform his occupational activity. According to the recommendations of the WHO and its ICF-classification such a judgment should include the total bio-psycho-social context of the individual. The positive feedback and a low dropout rate proved good acceptance of portable ergospirometry in this field of work over a 45–60 min period.Ī frequent medical task involves the evaluation of an individual’s physical capacity with regard to his or her work demands. The occupational activity of cleaning was defined as a “committed activity”, performed close to the upper limit of the continuous physical capacity (approaching V’O2 at VT1). In addition, there was positive feedback regarding the wearability of the portable device. This was scarcely lower than the individual V’O2 at VT1 and approached 45% of the maximum physical capacity (peak V’O2). Performance V’O2 (the average oxygen consumption over 45–60 min of work- time) was 1.06 L/min or 4.4 METs. This was followed by portable ergospirometry lasting 45–60 min while pursuing regular cleaning activities. Thirty-five cleaners performed a bicycle ergospirometry to determine their maximum physical capacity (peak V’O2 = L/min) and their aerobic-anaerobic threshold (V’O2 at the Ventilatory Threshold 1 ). In addition to this, the aim was to verify the suitability of portable ergospirometry in determining the occupational workload in a real-life setting. The effort was demonstrated in absolute terms (V’O2), in relation to the involved person’s maximum physical capacity (peak V’O2) and in relation to the individual aerobic-anaerobic threshold (V’O2 at VT1, the point when lactate starts to accumulate but can be cleared). ![]() The aim of the study was to determine the physical effort and energy expenditure needed over a working period of 45–60 min, specifically for the occupational activity of cleaning.
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