Measures of Endurance Training for Endurance Events In addition to pace training, endurance may be improved by bettering general physical condition, increasing muscular strength, achieving greater neuromuscular coordination and by physicochemical adjustments. In order to improve endurance the activities in the training program should be prolonged and preferably should include the same movements as will be used in performance. Through practice the athlete extends his "quitting time" until physiologic limits are reached. The ability to endure fatigue is probably the greatest factor in endurance for prolonged muscular work. Through practice of endurance events the circulatory and respiratory systems become more efficient in supplying oxygen and in removing the waste products of metabolism. The temperature regulating system enables the body to adjust effectively to the heat of muscular work. The skeletal and cardiac muscles become stronger and more efficient. Through training of the nervous system the movements become better coordinated, waste motions are eliminated and the action between synergic and antagonistic muscles is refined. Through diet and exercise the oxygen carrying and buffering capacity of the blood are improved and the body is better able to mobilize and transport foodstuffs for supporting physical activity. Measures of Endurance At rest the differences between the athlete with a high level of endurance and an individual with poor endurance are negligible. When they both start working, however, the differences appear. The differences are most striking during the most vigorous work. The athlete with great endurance is characterized by a greater respiratory capacity (maximum ventilation), by the ability to withstand higher levels of lactic acid and to use larger volumes of oxygen and by a lower maximum heart rate in exhaustive work. The return of the heart rate and lactic acid concentration to normal is faster in the athlete. To summarize, the athlete with great endurance can carry on exhaustive work for a longer period and can establish a physiological equilibrium (steady state) at higher rates of work. He can recover from work more quickly and is thereby enabled to start a second piece of hard work sooner than can the individual with poor endurance.		Home Pace Motivation Measures of Endurance Computation of Dietary Requirement Work Efficiency Maximum Steady State Work Inefficiency of Anaerobic Work Estimation of Work Efficiency Efficiency of Grade Climbing Low Economy of Slow Work Maximum Rate of Work Levers of the Body Fatigue and Recovery General Fatigue Symptoms Anxiety State Organic Fatigue Cortical Motor and Sensory Centers Effect of Exercise on Mental Work Visual Fatigue Muscular Fatigue Fatigue Prevention and Recuperation