To test the hypothesis that, during exercise, substantial heterogeneity of muscle hemoglobin
and myoglobin deoxygenation [deoxy (Hb+ Mb)] dynamics exists and to determine whether …

L), muscle O2 consumption (QO2) kinetics are expressed in a first-order phase 2 (or
fundamental) pulmonary O2 uptake (VO2) response: dV O2/dt· VO2 (t) VO2 (ss); where VO2 …

ABSTRACT JONES, AM, and DC POOLE. Oxygen Uptake Dynamics: From Muscle to Mouth—
An Introduction to the Symposium. Med. Sci. Sports Exerc., Vol. 37, No. 9, pp. 1542–1550 …

It has recently been reported that the 'gain'of Phase II increase in pulmonary oxygen uptake
(ie the 'fundamental'increase in V ̇ O 2 per unit increase in work rate; Gp) does not attain …

The “slow component” of O2 uptake (V̇o2) kinetics during constant-load heavy-intensity
exercise is traditionally thought to derive from a progressive recruitment of muscle fibers. In …

We tested the hypothesis that during whole body exercise, the balance between muscle O2
supply and metabolic demand may elucidate intensity domains, reveal a critical metabolic …

The metabolic boundary separating the heavy-intensity and severe-intensity exercise
domains is of scientific and practical interest but there is controversy concerning whether the …

The energetics of cycling represents a well‐studied area of exercise science, yet there are
still many questions that remain. Efficiency, broadly defined as the ratio of energy output to …

In this study, results are reported from the analyses of vastus lateralis muscle biopsy
samples obtained from a subset (n= 90) of 125 previously phenotyped, highly active male …

Non‐technical summary The mechanisms determining exercise intolerance are poorly
understood. A reduction in work efficiency in the form of an additional energy cost and …