Ever watched a Strongman competition on TV? They start with large men picking something even larger up off the ground. That's a deadlift—the most basic and practical of all strength-building movements. Now, have you ever watched a Strongman competition with your wife or girlfriend? She'll notice something you probably wouldn't: Not a single one of those guys has a flat ass. So pull up a barbell: You'll be able to perform everyday feats of strength—lifting a sleeping child or a dying TV—and you'll look a lot better when she follows you upstairs to the bedroom.
The faster you lift, the better the results. If you're trying to increase size, fast lifts activate more of the muscle fibers that have the most potential to grow. If you're trying to become leaner, fast lifts do more to crank up your heart rate--and by extension your metabolism—than anything else. And if you're trying to grow stronger . . well, how many feats of strength can you list that are performed slowly and deliberately? Even if something looks slow from the outside, you can bet that the guy performing the feat is trying like hell to get it done as fast as possible.