Workout

Warm-up
600 choice

Set (4 rounds, rev IM order by round, 800m):
50 kick (stroke)  :10 rest
50 drill (stroke) :10 rest
100 swim (50 stroke build / 50 free ez) :10 rest

Main Set (3 rounds, descend 200's by round, 2100m):
100 fly / 100 back on 1:45
100 back / 100 breast on 1:45
100 breast / 100 free on 1:45
100 free / 100 fly on 1:45
100 free ez on 1:45
200 IM on 3:45 (#1-moderate, #2-strong, #3-all out)

Warm-down
200 ez