A how-to guide for core exercises

A reader commented on my post The Core: All it's cracked up to be with a question about the specific exercises I mentioned -- push-ups, pull-ups, dips, squats, lunges, touch-downs, and planks. He wanted to know how to do some of these since the names themselves are not so self-explanatory. Since I neglected to include the how-to details, I'm back, this time to clue you in on how exactly to strengthen that core of yours. Here goes.

Most of you probably know how to do push-ups, but click here for a refresher. As for the rest, you can find them by clicking on the name of each exercise. The only one I've omitted is the touch down. When I find a good tutorial link, I'll pass it on. For now, though, the following line-up will keep you plenty busy -- and plenty fit too.

Pull-ups
Dips
Squats
Lunges
Planks

For more how-to tips for almost every exercise imaginable, visit this site.