BPK 142 Lecture Notes - Lecture 13: Visual Acuity, Stroke Volume, Lean Body Mass
9 Dec 2017
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Moderate altitude 1500m -3000m (5000 - 10,000 feet) - in relation to athletics, we are concerned with this altitude range. High altitude - greater than 3000m (10,000 feet). More than 40 million people live and work between 3000m and 5500m (10000 and 18,000 ft. ). Extreme altitude over 5500m (18000ft) mt everest 8848 m. Barometric (air) pressure decreases as altitude increases (ie) as the weight of the column of air above the point of measurement decreases. However, the chemical composition of the atmosphere is uniform up to 20,000 meters. Po2 in dry ambient air at sea level = . 209 x 760 mm hg = 160 mmhg. Po2 in dry ambient air at 3048 meters (10,000 ft. ) = . 209 x 510 mm hg = 107 mm hg. Po2 in dry ambient air at summit of mt everest - 8848 meters (29,028 ft. ) = . 209. X 250 mm hg = 52 mm hg.
