Characteristics of Physiological Parameters Determining Endurance in Prolonged Physical Efforts, Definition and Principles of Health Training and Exercise Intensity Zones

Physical effort lasting more than 30 minutes, classified as prolonged, depends on the body's endurance, training level, and metabolic and neuromuscular factors. A key indicator of aerobic capacity is maximal oxygen uptake (VO2max), which measures the maximum amount of oxygen the body can take in and utilize during exercise. VO2max is influenced by factors such as minute ventilation, cardiac output, cardiorespiratory coordination, and the muscles' ability to oxidize energy substrates. Endurance improves through an increase in the number of mitochondria and enzyme activity in muscles, enhancing the efficiency of energy transformation processes. A high VO2max is a marker of significant aerobic capacity and training level, but working at maximal oxygen uptake can only be sustained for 5-8 minutes. In longer efforts, it is necessary to reduce intensity below the lactate threshold, which better reflects the endurance of marathon runners. Endurance training leads to muscle adaptations, increasing mitochondrial numbers, energy reserves, and the efficiency of oxidative processes. Health training is a long-term process aimed at improving and maintaining health through moderate-intensity physical activity. Its goal is to prevent and support the treatment of lifestyle diseases, such as cardiovascular diseases, obesity, or osteoporosis. Regular physical activity supports the immune system, improves mental well-being, reduces stress, and increases the body's endurance. Training should be tailored to individual capabilities, and its intensity must be monitored, particularly in individuals with cardiovascular diseases. Consistency, warming up before exercise, and stretching after training are important.