I really hate doing any type of core assist work. but I can tell when it comes to my squat not having my core up to par is really effecting my squat. My legs feel good on heavy squats and my back is my strongest part of me right now but when I come out of the hole in my squats my abs shake and feel like they are holding me back (if this makes sense). I was doing decline sit ups with 20lbs behind my head but I just can not seem to stick with it. I was wondering what you guys find that really help in this department. I don't care about a six pack or crap like that I just want a strong core that will help better support a heavier squat.