True, cardiovascular endurance and overall running economy are very important to my UltraWoman goal. However, building foundational strength now- results in raw power and reduced injury risk so that I will be able to log those big miles later on. Longer, leaner and faster. Long distance and Ultra racing require a strong, whole body in order to sustain the endless hours of repetitive pounding, climbing, descending all without breaking down and losing form. Identifying then addressing weak areas before you go big makes perfect sense.