Workout

Warmup (600)  
200 swim/200 drill
100 kick

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

Set (1200)
8 x 150's on 2:30
…free / stroke / free
…IM order

Set (600) 
12 x 50
…odds free on :50
…evens stroke on 1:00

Cool-down (200)
200 drill