"nonsteady" - 1 õppematerjal

Exercise Physiology - lecture 1

indicating control systems for breathing is matched by O2 demand. VE/VO2 · TASK: Calculate The ventilatory equivalents for the following exercise intensities VEL.min VO2L.min VE/VO2 23.3 35 1.5 24 48 2.0 24.8 62 2.5 30.0 90 3.0 Ventilatory Threshold · Steady state: VE/VO2 remains constant because pulmonary ventilation eliminates CO2 produced. · Nonsteady state: as VO2 increases, VE eventually increases disproportionately to increase in VO2, this is known as Ventilatory Threshold (VT) · Normally occurs at approx 55­70% of VO2max, although can be 80% in trained athletes. Ventilatory Threshold Exercise Intensity and Blood Lactate Accumulation Ventilation (VE)  Variable Rest Hard exercise Alveolar ventilation (l/min) 4.2 140 Tidal volume (l) 0