Best ab exercise? Rack Pulls

I was having trouble with my grip on deadlift so I decided to do some rack pulls and hold them at lockout for 5 seconds. That worked really well and I managed to pull and hold 545 lbs and hold it for 5 seconds (I had failed at 405 last week). Not sure rack pulls helped anything else but it was fun putting on all those plates in LA Fitness.

The cool part was the impact that had on my abs. Two days after that session of rack pulls, my abs are sore. I guess I worked the core really well. I did them without a belt so my core was fully engaged for each of the pulls and holding that much weight for 5 sec was certainly challenging.

So, keep lifting heavy things. Your abs will love you.

Tom