100m Sprint [16s]
Rest 1 minute
200m Sprint [33s]
Rest 2 minutes
300m Sprint [43s]
Rest 3 Minutes
400m Sprint [1:19]
Rest 4 minutes
400m Sprint [1:46]
Rest 3 minutes
300m Sprint [1:08]
Rest 2 minutes
200m Sprint [45s]
Rest 1 minute
100m Sprint [21s]

Tweaked my leg about a quarter through the first 400m. It was my left leg, in the lower part of the upper half of my leg. It is in the inside. I think it is where the hamstring attaches to the back of the knee. Went pretty slow for the rest of the sprints.