Workout

Warmup (500) 
300 swim/100 drill/100 kick

Set (600)
6 x 100 on 1:30
…descend 1-3,4-6

Set (1200)
2 rounds
4 x 150's on 2:30
…50 fr/50 stroke/50 Fr
…IM order

Set (1000) 
5 rounds
4 x 50
…odds free on 1:00
…evens stroke on 1:15

Cool-down (100)
100 ez