Workout

Warmup (600)
600 swim
...every 3rd 50 stroke

Set (600)
8 x 75 on 1:15
…odds 50 fist/25 swim
…evens 50 drill/25 swim

Set (400)
16 x 25 kick on :30
…odds breast 
…evens dolphin  

Set (2000)
4 rounds
5 x 100
…each round
#1 IM-1:30
#2 free-1:15
#3 breast-2:00
…work pulldown/glide
#4 IM on 1:30
#5 25 fly/25 free-1:30

Cool-down (400)
200 moderate
200 superslow