ABP time in your swim workouts?
You know how we get suggestions to add some amount of ABP time at the end of the bike workouts if we can? I don't know if anyone else here does this but since I need lots of swim training in my continuing rehab of my shoulder I came up with a game I play with the clock. I'm sure others have thought of it but I call it "chasing down the clock."
My swim test came out to showing that my 100 yds time over the TT is 1:54. (Yeah, I know. Told ya I need the work.) I use that as a sort of guideline for how fast to do this game at the end of the swim workouts if I'm not feeling too wasted and I have the time. After a little rest I'll start doing laps again (sometimes plain swimming, sometimes with a buoy depending on if my legs want a break) starting on a ##:00 reading on the clock. To keep me pushing I'll glance at the clock to make sure I'm knocking off at least a few seconds off an even minute for each lap. So at the end of each 50 the clock reads something like :56, then :50, then :46, etc... I'll set a target time in my head as to when I want to end the exercise. If I want to chase down a full minute on the clock I keep going until the clock shows :00 again on the lap I just completed. After some of the workouts that kill me that means I've added on another 11-12+ laps of swimming steadily. Not slacking off but not at threshold pace either. I really want a 32 minute HIM swim without staggering up onto the beach in a delirious haze. Heh.
You can adjust the game however you want all depending on how fast your 50's are at the end of the workout.