Active compression exercises

I am hoping to move past MN/PE1 sometime in the next week or two and in preparation for MN/PE2 I have been working on some compression exercises. Right now I am just doing some seated straddle ups and seated pike ups twice a week after foundation. I am noticing that my compression is slowly getting better, but are there any other exercises that I can be doing to improve my compression strength (especially in a straddle)?

Doing the exercise and focusing on the middle split series is usually enough. If you struggle then you need to worry about tweaking the program.