The research aims to determine the influence between altitude training studies also explain the haematological parameters and endurance performance. The research was based on secondary data analysis, and different websites related to hematological parameters were used to collect the data. When proper exercises are performed at high altitudes for many days, the body of the athlete becomes habitual in such a way that it can bear more pressure from exercise and also be able to cope with the after-effects of exercise, such as fatigue. The research study depends upon quantitative analysis to determine the research using E-view software and perform results including descriptive, unit root test, histogram, and state analysis, which also explain the graphical analysis between them. The other important implication of high-altitude training is that it helps in the mental growth of athletes, thus helping them to cope with mental health issues such as stress, anxiety, depression, fear of failure, Fear of height, and others as well. The overall research found that the direct and significant influence of altitude training on haematological parameters and endurance performance. All of these facts prove that high altitude training is necessary for enhancing athletes' performance and endurance level during sports.