Workout

Warm-up (600)
2 rounds
100 swim/100 drill/100 kick

Set (600)
4 x 100 build on 1:30
2 x 100 IM on 1:40
...descend 1-2

Set (1200)
6 rounds
75 drill on 1:30
50 moderate on 1:00
75 sprint on 1:00

Set (700)
2 rounds
75 free on 1:15 
descending stroke count by 1 each 25
4 x 50 free :45 moderate
3 x 25 stroke of choice
...ALL OUT on :40

Cool-down (100)
100 EZ choice