200 warm-up
4×50 as 1 drill/1swim @ 20s rest
4×25 as mid pool flip (12.5 swim + flip + 12.5 back) @ 60s
4×100 swim as 75 smooth/25 fast @ 1:45/2:00
Main:
400 free negative split @ 7:00/8:00
8×50 as Pace400 @ 55/1:05
400 free negative split @ 7:00/8:00
4×100 Pace800 @ 1:50/2:00
400 free negative split @ 7:00/8:00
2×150 Pace1500 @ 2:15/2:30
200 cool down
TOTAL: 3400m