Why not use the elliptical machine or something of that nature with no impact? I can't run due to shin splints. I have the orthotics and they do help but to a limited degree so I either walk or use a machine similiar to what I described.

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There are in fact, two things: science, and opinion; the former begets knowledge, the latter ignorance. -Hippocrates of Cos
"New opinions are always suspected, and usually opposed, without any other reason but because they are not already common." —John Locke
"And you shall know the truth, and the truth shall make you free.” - Jesus Christ

"Perago Validus"