Run

Threshold Intervals

Warm up : 2-3 miles AeT pace // 3:3 NB + run drills

Mid-Distance: : 5 x 1k

Marathon : 5 x 2k

Ultra 4 x 3k

Cool Down: 2-3 miles / 3:# NB

Core X is a simple routine - 10 exercises, 30 seconds each exercises; 5 minutes total. While it is short and sweet, it is also very challenging.