10x
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50' Sled Push
Round x 5 Ab Movements (5, 10, 15, 20...)
I started out doing sit-ups, but predictably had to stop because I was cramping.
I switched to leg raises, then finally transitioned to a bar for knee tucks, which turned into almost knees-to-elbow – I had a pretty good kip going there at the end. I would do half knee tucks and half leg raises
It’s 275 reps of core movements, which is non-trivial.