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HUMAN CARDIOPULMONARY RESPONSES TO EXERCISE: COMPARISONS BETWEEN PROGRESSIVE AND STEADY STATE EXERCISE, BETWEEN ARM AND LEG EXERCISE, AND BETWEEN SUBJECTS DIFFERING IN BODY WEIGHT
Author(s) -
Cotes J. E.,
Allsopp D.,
Sardi F.
Publication year - 1969
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1969.sp002019
Subject(s) - respiratory minute volume , work rate , ventilation (architecture) , cycle ergometer , tidal volume , work (physics) , vo2 max , cardiology , steady state (chemistry) , heart rate , physical therapy , cardiac output , incremental exercise , respiratory exchange ratio , linear regression , physical exercise , medicine , physical medicine and rehabilitation , respiratory system , mathematics , hemodynamics , chemistry , blood pressure , statistics , physics , thermodynamics
The regressions of the oxygen uptake on rate of work, of the ventilation and cardiac frequency on oxygen uptake, and of the ventilation on tidal volume have been obtained over the ranges where they were linear during pedalling and during cranking a cycle ergometer. The regression coefficients for ventilation and cardiac frequency on oxygen uptake are higher for light than for heavy subjects, and for work which is performed with the arms instead of the legs; possible reasons are discussed. The respiratory frequency in relation to tidal volume is also higher for arm than for leg work. In the comparison of progressive and steady state exercise no systematic differences were observed, except for the relationship of the consumption of oxygen to the rate of work; this finding is relevant to the planning of exercise studies on normal subjects.