Whoa! That's a lot of laps

I signed up for the triathlon swim class last night. Good thing, because when I got into work, coach Josh had some swim suggestions waiting in my inbox. 28 laps (1 lap is one length and back) for the first workout - I think that is a good portion of a mile. I've never done that many laps in one workout ever. They did say that we can modify it to our ability. I think I will half workout #1.

Swim Workout #1

Warm up: 200S, 50K, 50S
Main Set: 300 S moderate tempo RI = 30 seconds
100 S fast RI = 30 seconds
200 S moderate tempo RI = 30 seconds
100 S fast RI = 30 seconds
100 S moderate tempo RI = 30 seconds
100 S fast RI = 30 seconds
Cool down: 200 S easy

Swim Workout #2

Warm up: 100S, 50K, 100P, 100S
Main Set: 8 x 50 fast RI = 20 seconds
Cool Down: 200 S easy

Swim Workout # 3

Warm up: 200S, 50K, 100P
Main Set: 5 x 100 on 10 sec rest. Maintain a steady pace on each 100.
Cool down: 100 S, 100 P, 100 K

Swim Workout #4

Warm up: 300S
Main set: 3 x 100 at moderate effort
2 x 200 at mildly difficult effort
1 x 300 at hard effort
Cool down: 200S