Well.... that's what I seem to have done. I felt it during the thrusters/burpees workouts. Worked through it and finished that workout in 16:59. I woke up the next day thinking that I felt o.k. and decided to do my first workout in the morning since I got up early. I started doing the box jumps and immediately felt the pain in my abs - felt it on the burpees and especially on the situps. I quit after the first round. So happens that I had my annual physical yesterday so I asked the Doc about it and he confirmed that it was nothing serious.
Did my 20 minute run on the treadmill due to the snow. My home treadmill sucks! I got it for free so I should not complain. I think the speed readings are accurate, but the distance readings are way off. It was very evident yesterday and explains why all of the runs I have done on that treadmill have seemed miserably slow. Running did not hurt so I put my all into it. I had no trouble getting my HR to 160 and kept it there for a while - it crept up to close to 170 by the time I was finished. I kept the speed over 8mph and slowed it down to 7.7 midway through, but brought it back up after a minute (I reminded myself that it was supposed to hurt). I am fairly confident that my average speed was very close to 8mph. Treadmill said I completed 2.12 miles. That does not compute - I estimate it was more like 2.65 miles.
Not to miss a workout I modified the xfit circuit to something that would not aggravate the abs - 20 squats, 20 pushups, 18/18 down to 2. Finished in 7:48.
P.s. burpees are hard after thrusters - I nearly smashed my chin into the cement floor on my first burpee as I did not expect that the thrusters had robbed that much power from me.