This document discusses aerobic exercise programming and training. It explains that for physiological adaptations to occur, the body systems must be stressed beyond their current limits through continued overload. The body will adapt to the exercise stress until the tissues are no longer overloaded. It also discusses various performance factors related to aerobic endurance like VO2 max, lactate threshold, exercise economy, and fuel sources. The document outlines components of an aerobic exercise design including exercise mode, training frequency, intensity, duration, and progression. It also describes different methods of measuring exercise intensity like heart rate, the Karvonen method, RPE, and METs. Finally, it briefly discusses aerobic training for fat loss and includes review questions.