Answer: This is a great question. Based on the training that is explained on the anaerobic development page, the answer would be to complete a mesocycle focused on muscle buffer prior to a mesocycle focused on speed endurance. Due to sequential development, the adaptations of the muscle buffer will allow higher performance levels to be reached during speed endurance. HIIT can be completed throughout both mesocycles for continuous development. Overall, this leads to more effective improvement of the anaerobic system.