What type of training primarily enhances aerobic capacity?

Endurance training is specifically designed to improve aerobic capacity, which is the body's ability to take in, transport, and utilize oxygen during prolonged physical activity. This type of training typically involves sustained activities such as running, cycling, swimming, or rowing performed at moderate levels of intensity over an extended period.

The reason endurance training is so effective at enhancing aerobic capacity lies in the physiological adaptations that occur as a result of consistent practice. These adaptations include increased capillary density, improved mitochondrial function, and enhanced cardiovascular efficiency. As a consequence, individuals can sustain activity for longer durations without fatigue.

In contrast, strength training focuses on building muscular strength and hypertrophy rather than improving the endurance aspect of aerobic capacity. Agility training emphasizes quick and precise movements, which are important for sports performance but do not directly enhance aerobic fitness. Core training aims to strengthen the abdominal and back muscles to improve stability and posture, which also doesn't target aerobic capacity specifically. Therefore, endurance training is uniquely positioned as the most effective method for boosting aerobic capacity among the listed options.