P90X Day 83 I switched out my scheduled Kenpo for: 1.75 miles warm up 5 x 400 m all out hill sprints ( about 5 to 6 %) with 400 m recovery walk back down. (4:21, 4:21, 4:21, 4:21, 4:24). My legs were jello, my lungs were burning, and I was light headed on that last one? 1 mile cool down Total 5 miles |