A new approach for the assessment of endurance work

  • J. Sen Gupta
  • S. S. Verma
  • N. T. Joseph
  • N. C. Majumdar


Thirteen young healthy motivated subjects were asked to work at fixed rates on bicycle ergometer till exhaustion. Different rates of work were given on different days at intervals of 2–3 days to avoid training effect or the effects of previous work. Resting O2 consumption, minute ventilation, heart rate and maximum voluntary ventilation were noted before the exercise commenced and the exercise ventilation and heart rate were noted during endurance effort at suitable intervals with a view to predicting endurance time in prolonged physical effort. Analysis of 30 sets of observations has revealed that endurance time is hyperbolically related to both exercise dyspnoea above its resting value and exercise heart rate above the resting value expressed as percentage of the individuals' maximum value. The multiple correlation coefficient between observed and estimated endurance times, expressed logarithmically in terms of these two indices, is 0.9652 which is highly significant (P 0.001). It has been conclusively established that a combined index of cardiorespiratory strains during maximal or near maximal efforts is superior to any single stress index as commonly employed, and hence a nomogram has been suggested from which the endurance time could be readily and reliably predicted from observed values of exercise dyspnoea and heart rate (as percentage of HRmax).

Key words

Endurance Work Capacity Continuous Heavy Work Prediction of Prolonged Work 


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Copyright information

© Springer-Verlag 1974

Authors and Affiliations

  • J. Sen Gupta
    • 1
  • S. S. Verma
    • 1
  • N. T. Joseph
    • 1
  • N. C. Majumdar
    • 1
  1. 1.Defence Institute of Physiology and Allied SciencesNew Delhi

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