ساده ترين روش تعيين آستانه بي هوازي به روش تبادل گازي در طي ورزش

The simplest method for detecting anaerobic threshold during exercise by gas exchange

In steady state exercises, the level of lactic acid remains unchanged while it is increased during incremental exercises. The point at which the lactic acid begins to increase, is called the anaerobic threshold (AT). This study was conducted to detect anaerobic threshold during exercise. In this study 15 volunteer male athletes aged 23-26 years were selected to exercise with cycle ergometer. At the end of each 3-minute interval, their blood samples were obtained and work rate increased 25 watt. Spirometric indices were measured by ergometer. The results showed that during the exercise, the increase in 02 Consumption was proportional to C02 production but above the minute 9, the volume of C02 was increased more than 02. The distance of two curves began to increase during the minutes 9 to 12 which was the anaerobic threshold. That has obtained using gas exchange method and the change in slope of VC02 and V02 regression lines.