The body adapts to consistent endurance training by increasing cardiac output and enhancing the efficiency of oxygen utilization in muscles. Over time, improvements occur in vo2 max, allowing individuals to perform at higher intensities with less fatigue. These adaptations also include an increase in the number of mitochondria within muscle cells, facilitating greater energy production. Furthermore, endurance training helps to improve metabolic responses, making the body more efficient at burning fat for fuel during prolonged activities.