Workout

Warm up (500)
300 swim
200 pull
...breathe every 3,5,7,5

Set (400)
8 x 50 on :50
…build 

Set (600)
100 swim on 1:30
2 x 50 swim on :45
100 swim on 1:30
100 kick/swim on 2:00
100 swim on 1:30
2 x 50 kick on 1:00

Set (1500)
3 rounds
150 moderate on 2:15
150 on 2:20
…50 stroke, 50 kick, 50 fr  
150 build on 2:00
50 easy on 2:00

Cool-down (200)
200 EZ