After a short historical account, and a discussion of Hill and Meyerhof's theory of the
energetics of muscular exercise, we analyse steady-state rest and exercise as the condition …

The steady state concept implies that the oxygen flow is invariant and equal at each level
along the respiratory system. The same is the case with the carbon dioxide flow. This …

For over a century of creative research, many theories on the possible mechanisms
controlling respiration during exercise have been developed and discussed. One of the most …

The changes in cellular respiration needed to increase energy output during exercise are
intimately and predictably linked to external respiration through the circulation. This review …

Pulmonary oxygen uptake (V ̇ O 2 ̇ VO _2) slowly increases during exercise above the
anaerobic threshold, and this increase is called the slow component of V ̇ O 2 ̇ VO _2 …

Rate of O2 consumption (VO2), intracellular PO2, lactate extraction, and tissue contents of
phosphocreatine, creatine, ATP, lactate, and pyruvate were measured during rest-work …

The activities of daily living typically occur at metabolic rates below the maximum rate of
aerobic energy production. Such activity is characteristic of the nonsteady state, where …

The lactate increase during exercise is a critically important biochemical and physiological
event that leads to decreasing cell pH, an accelerated rate of glycogen depletion in the …

It is well known that physiological variables such as maximal oxygen uptake (), exercise
economy, the lactate threshold, and critical power are highly correlated with endurance …

The oxygen cost of breathing has been measured in 10 sedentary subjects during treadmill
exercise at a known fraction (80 per cent) of their maximal aerobic work capacity. Each …