Muscular exercise requires transitions to and from metabolic rates often exceeding an order
of magnitude above resting and places prodigious demands on the oxidative machinery and …

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 …

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 …

Cardiorespiratory interactions at the onset of dynamic cycling exercise are modified by warm-
up exercises. We tested the hypotheses that oxygen uptake (V̇o2) and cardiac output (Q̇) …

Bedrest as an experimental paradigm or as an in-patient stay for medical reasons has
negative consequences for cardiovascular health. The effects of severe inactivity parallel …

Purpose This study evaluated (i) the relationship between oxygen uptake (̇ VV˙ O 2)
kinetics and maximal ̇ VV˙ O 2 (̇ VV˙ O 2max) within groups differing in fitness status, and …

Background Badminton is a highly demanding sport characterized by intermittent efforts with
energy being provided by both the aerobic and anaerobic systems. To date, no incremental …

We performed the first analysis of heart rate variability (HRV) at rest and during exercise
under full autonomic blockade on the same subjects, to test the conjecture that vagal tone …

Aging is associated with a functional decline of the oxidative metabolism due to progressive
limitations of both O2 delivery and utilization. Priming exercise (PE) increases the speed of …

The study investigated the effect of prolonged hypoxia on central [ie, cardiovascular oxygen
delivery (Q̇aO2)] and peripheral (ie, O2 utilization) determinants of oxidative metabolism …