The inverted row isn't just for beginners. More advanced lifters can use it to build massive forearms and crushing grip strength. Just use a thick bar or Fat Gripz attached to a regular bar.
Set up a thick bar in a rack or use Fat Gripz.
Get a good grip on the bar, pull, and pause for 1-2 second count at the top.
After 7 or 8 reps, you'll really feel it. Ramp it up by wearing a weighted vest if needed.
Jim Wendler lists the best in conditioning, getting stronger, assistance work, home gyms, and strength training books, along with torpedoing the “best” myths.
I'm normally somewhat of a bookworm and science geek, although – to blow a little sunshine up my own butt – I have to say, I'm getting better at reading people.
All you need to build strong, powerful abs is “The Pillar Killer” – a mechanical drop set built around a series of core-specific movements. Check it out.