Discuss how changes in "central command" and "peripheral feedback" following an endurance training program can lower ventilation responses to submaximal exercise. a) Central command refers to the brain's control over ventilation, while peripheral feedback involves feedback from muscles and joints. Endurance training can improve the efficiency of central command and reduce the need for excessive ventilation during exercise. b) Central command refers to feedback from muscles and joints, while peripheral feedback involves the brain's control over ventilation. Endurance training can improve the efficiency of peripheral feedback and reduce the need for excessive ventilation during exercise. c) Central command refers to the brain's control over ventilation, while peripheral feedback involves feedback from the respiratory system. Endurance training can increase the sensitivity of central command, leading to increased ventilation during exercise. d) Central command refers to the feedback from the respiratory system, while peripheral feedback involves feedback from muscles and joints. Endurance training can decrease the sensitivity of central command, leading to decreased ventilation during exercise.