Continuous output limit

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The endurance limit is in the ergonomics and sports science that limit to the static or dynamic work can be provided without increasing muscular fatigue, which forces the premature termination of power delivery. In working studies according to REFA, it forms the reference value for determining normal performance and the level of performance .

The endurance limits are individual and are also determined and handled individually with systematic training in sport.

It is not possible to do so within the framework of the work study . The continuous performance limit here is the highest performance that can be sustained by an average trained person for more than 8 hours per day. It can be approximated in different ways:

  1. About the energy expenditure: For hard work , the continuous output limit for men is approx. 16.5 to 17.5 kJ / min (4 to 4.2 kcal / min), for women it is approx. 10.8 to 11.8 kJ / min (2.6 to 2.8 kcal / min).
  2. About the pulse rate: The continuous output limit for the 8-hour day is 30–35 pulse beats above the resting pulse rate.
  3. About the maximum oxygen uptake: For the untrained, the endurance limit is 30% of the maximum oxygen uptake without taking breaks and 50% with taking breaks (high-performance athletes even achieve up to 90%).

The organization of work requires values ​​that are measured in such a way that the majority of the workforce is not overwhelmed. In addition, it must be easy to determine when they are reached. For example, the construction trade association describes the limit as being reached at a “ heart rate of 110 per minute for the working population”.

The continuous performance limit for static work is 10% of the personal maximum muscle strength.

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  1. ↑ REFA Association for Work Studies and Business Organization e. V. (Hrsg.): Methodology of the company organization: Lexicon of the company organization . Carl-Hanser, Munich 1993, ISBN 978-3-446-17523-5 , pp. 59 .
  2. ↑ Continuous performance limit - ergonomics in construction work. In: www.bgbau.de. BG Bau, accessed on March 31, 2016 .
  3. ^ Robert F. Schmidth, Florian Lang, Manfred Heckmann: Physiologie des Menschen . 31st edition. Springer Berlin Heidelberg, Berlin / Heidelberg 2011, ISBN 978-3-642-01651-6 , pp. 865 .