Aim: though modification to intermittent hypoxia (IH) improve exercise performance by increasing oxygen delivery and utilization,
the effectuate of high intensity interval intermittent in normobaric hypoxic chamber on CBC interaction induced by exhaustion
exercise remain undecipherable. The goal of this investigation is to compare the effect of high intensity interval training in hypoxic
(O?:14%) and normoxic (O?:21%) conditions on CBC, lactate thresholds, WVo2max, WLT and blood cells in response to exhausting
16 male athletes were shared randomly into 2 groups (hypoxic and normoxic groups). They did exhaustive exercise (ergometric
cycle) and blood samples were taken before and after the exhaustive exercise. These 16 athletes accomplish ergometer maximum
work rate (Wmax) in 12 sessions during two weeks. Once more, afterward two weeks, all athletes experienced exhaustive exercise
before and after which blood samples were taken from them. Hemoglobin, leukocytes, (eosinophil, lymphocyte, monocyte and
neutrophil) lactate thresholds, WVO2 max, WLT and blood cells were evaluated and analyzed by SPSS software (version 19).
There were no significant differences between the increases in any of the above- mentioned performance parameters in either training
environment (p? 0.05). In addition, neither hemoglobin concentration nor hematocrits were significantly changed in no groups
(p?0.05). It is concluded that acute exposure of moderately trained subjects to normobaric hypoxia during a short-term training
program consisting of moderate to high-intensity intermittent exercise has no enhanced effect on the degree of improvement in
neither aerobic nor anaerobic performance. These data suggest that if there are any advantages to training in hypoxia for sea level
performance, they would not arise from the short-term protocol employed in the present study.