Check out this book then by a urologist. Exercises, nutrition, and supplemation to increase erection strength
I skimmed it (pretty thourougly) at the bookstore and it looked pretty good. Seems sound scientifically, I will probably get it for myself.
Quote
My Ten Promises to YouIf you are happy with your hardness now, you’ll be even more pleased in as little as four days.
You can retain optimal hardness, sexual performance, and pleasure indefinitely.
You will heighten the sensitivity of your penis and have richer orgasms.
You will feel in peak condition all the time.
You will look and feel younger.
You’ll jump-start energy systems.
You will recapture and improve physical strength and endurance.
You are going to protect and defend the body’s most vital organs — the heart and brain.
You will maintain and improve the conditioning of the body, restoring a new, inner self-confidence.
You’ll enhance the performance and sexual satisfaction of your partner.
—Steven Lamm, M.D.
<SNIP>
Dietary changes, regular exercise, and a variety of supplements that I will describe throughout The Hardness Factor can bring dramatic results in a man’s hardness and overall sexual satisfaction. For more serious problems, pharmaceutical researchers have already found a way to naturally restore hardness with powerful prescription medications. But more important, these erection experts and I are in agreement that preventing the loss of erections will always be easier than restoring them.
As a doctor and a sexual medicine scientist, I know that the Hardness Factor will aid men in their 20s through their 70s and beyond, not only with their health and sexuality but in the sheer enjoyment of life.
I know that sounds like a lot of hype and snake oil, but the actual book is no-nonsense and has a lot of good stuff in it. I will probably get it.