hard speed on stale legs: {1km @ 2:59 (4:48 min/mi)} + {800m @ 2:27 (4:56 min/mi)} + {400m @ 1:08 (4:32 min/mi)} + {7 x 100m @ 4:4X to 3:4X min/mi} ::: (concrete) /// mile race szn coming soon!