Locked up

I arrived at The College of New Jersey at about 11:15AM with 3x400 in 60 seconds on my mind. The temperature was a very doable 63 degrees.   

Rep 1: I got out okay, crossing the 100-meter mark in 15.  I relaxed on the backstretch, reaching the 200 mark in 30. I crossed the 300 in 46. As I hit the homestretch, I tried not to overuse my arms.  I crossed the 400 in 62-flat.

I walked for 10 minutes (800m)

Rep 2: Feeling fully recovered, I decided to get at the next 400.  I reached the 100 in 14/15 and the 200 in 30.  I looked at my watch at the 300 mark and saw 45.  I tried to relax over the last 100, finishing the lap in 61.5.

I walked another 800 meters in 10 minutes.

Rep 3: I was ready to go. I reached the 100 in 14 and the 200 in 28/29. I looked at my watch and saw 44 at the 300 mark. I finished up in 59.5.   

My butt was locked up afterwards, though.  

I was pleased with the workout.

If I do this workout in the near future, maybe I'll try either 4x400 in 62 or 3x400 in sub-60.