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V̇O 2 max (also maximal oxygen consumption, maximal oxygen uptake or maximal aerobic capacity) is the maximum rate of oxygen consumption attainable during physical exertion. [1] [2] The name is derived from three abbreviations: "V̇" for volume (the dot over the V indicates "per unit of time" in Newton's notation), "O 2" for oxygen, and "max" for maximum and usually normalized per kilogram of ...
Maximum oxygen intake, VO 2, is one of the best measures of cardiovascular fitness and maximal aerobic power. VO 2 max averages around 35–40 mL/(kg∙ min) in a healthy male and 27–31 mL/ (kg∙ min) in a healthy female. These scores can improve with training. Factors that affect your VO 2 max are age
The peak expiratory flow (PEF), also called peak expiratory flow rate (PEFR) and peak flow measurement, [1] is a person's maximum speed of expiration, as measured with a peak flow meter, a small, hand-held device used to monitor a person's ability to breathe out air.
For the comfort of the patient this is done over a 15-second time period before being extrapolated to a value for one minute expressed as liters/minute. Average values for males and females are 140–180 and 80–120 liters per minute respectively. [medical citation needed]
A normal minute volume while resting is about 5–8 liters per minute in humans. [1] Minute volume generally decreases when at rest, and increases with exercise. For example, during light activities minute volume may be around 12 litres. Riding a bicycle increases minute ventilation by a factor of 2 to 4 depending on the level of exercise involved.
vV̇O 2 max (velocity at maximal oxygen uptake), also known as maximal aerobic speed (MAS), is an intense running or swimming pace. This is the minimum speed for which the organism's maximal oxygen uptake (VO 2 max) is reached, after a few minutes of constantly maintaining this exercise intensity.
F ex O 2 is the fractional amount of oxygen present in the excurrent air stream (what the animal has consumed relative to baseline per unit time). For example, values for BMR of a 20 g mouse (Mus musculus) might be FR = 200 mL/min, and readings of fractional concentration of O 2 from an oxygen analyzer are F in O 2 = 0.2095, F ex O 2 = 0.2072 ...
The V/Q ratio can therefore be defined as the ratio of the amount of air reaching the alveoli per minute to the amount of blood reaching the alveoli per minute—a ratio of volumetric flow rates. These two variables, V and Q, constitute the main determinants of the blood oxygen (O 2 ) and carbon dioxide (CO 2 ) concentration.
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