Optimized life isn't about one single aspect of fitness.  Strength isn't much good if you can't run across the street.  Endurance isn't much good if you can't scratch your back. Mobility isn't much good if you can't pick up a load of wet laundry and carry it to the clothesline.  I like to make sure everyone is "moving in diverse and interesting ways"  I focus on making sure everyone is strong, mobile, durable, and has endurance for life.  We work hard to improve in multiple directions simultaneously, while having a terrific time and building an amazing community of friends and training partners.