Oxygen uptake is the maximal factor that can determine an athlete’s capacity to perform sustained exercise. VO2 max refers to the maximum amount of oxygen that an individual can utilize during intense or maximal exercise.
This parameter reflects the biological potential of the body. Uptake oxygen depends on several factors related to efficient respiratory, circulatory and muscular system functioning. For most people VO2max value ranges between 20 and 85 ml/kg/min. The higher the uptake of oxygen, the more energy during exercise is obtained from efficient oxygen sources.
Anaerobic threshold is a strictly defined load exercise at which anaerobic ATP processes begin to dominate the re-synthesis of ATP, needed to cover the energy requirements of the working body.
Exceeding the exercise intensity (threshold intensity) is associated with a sudden increase in blood lactate, leading to lactic acidosis, resulting in rapid fatigue of the body. The higher the threshold intensity of the exercise, the lower the physiological level of work and possibly longer duration (energy depends on ATP).
The load corresponding to PA is considered to be the most effective in endurance training. This happens because PPA is an effort load, which at its highest ability activates the oxygen in the working muscles (exercise improves metabolism). It also motivates the cardio-respiratory system, which apart from being responsible for muscle metabolism – determines the level of physical capacity.
In Rehasport Clinic we have adopted the direct method for determining oxygen uptake. This method is based on the person performing a continuous 15-20 minute test, based on exercise of increasing intensity until the individual reaches maximum load.
During the continuous procedure, ergospirometer recordes cardiovascular (HR – heart rate) and respiratory parameters (including VO2 – the amount of oxygen absorbed, VCO 2 – the amount of carbon dioxide emitted, Ve – lung minute ventilation). Oxygen uptake is calculated by a computer system, based on the difference in oxygen content between the inhaled and exhaled air, multiplied by minute ventilation of the lungs.