Figure 2.
Quadriceps, intercostal, and abdominal muscle haemodynamic responses. a) Quadriceps muscle blood flow; b) intercostal muscle blood flow; c) abdominal muscle blood flow; d) quadriceps muscle oxygen delivery; e) intercostal muscle oxygen delivery; and f) abdominal muscle oxygen delivery recorded at rest, at the time of exhaustion in room air (isotime), and tlim breathing normoxic heliox, pure (100%) oxygen or room air. Isotime data are those obtained on normoxic heliox or 100% oxygen at the same time as at the limit of exercise tolerance on room air.