This class offers the very thing it requires: core strength, which will stick and stay with you as you go the distance. This sequence works equally well before or after (not during!) your run. It also warms up and tones the legs, back and entire spine. Class begins on hands and knees for some spine, leg and shoulder warm ups. Then it moves into ab work. From there it flows through a series of low back strengtheners and ends with some standing poses to leave you feeling balanced and ready to go.