1/16

8 x 400m, 2 min rest between reps (should be repeatable) 

Round 1: 1:45.5
Round 2: 1:42.1
Round 3: 1:43.8
Round 4: 1:42.6
Round 5: 1:40.2
Round 6: 1:43.3
Round 7: 1:43.3
Round 8: 1:43.5