摘要：This study is aimed to study of the acute effects of altitude after a session of incremental exhaustive exercise on the maximal oxygen consumption (Vo2max), maximal heart rate (HRmax) and blood pressure of the athlete students of Shahid Chamran University in Ahvaz. Therefore, 10 male students of Shahid Chamran University in Ahvaz were selected as sample with an average age of 25.6±3.4 and an average weight of 66.34±6.58 kg. The subjects performed the modified Astrand protocol in the city of Ahvaz (sea level) and then, in the city of Shahrekord (Height). The Vo2max was measured through the time of the protocol implementation for each individual. The blood pressure was recorded before and after the protocol implementation and maximum heart rate was recorded after the protocol implementation. The study results showed that the Vo2max of the subjects significantly decreased at a height higher than sea level. In addition, the HRmax significantly increased in a height higher than sea level. On the other hand, the changes in the systolic and diastolic blood pressure of the subjects were not statistically significant. Generally, according to the obtained results it can be said that at a height higher than sea level, the cardiovascular responses to the exercise change due to the decrease of the partial pressure of oxygen.
