I'm not big on machines, I'd rather exercise outdoors, but I think the elliptical machines seem to replicate skinning movements pretty well. Try different strength/friction settings.
Another good thing, mostly for aerobics, might be Nordic Trak. They're good for getting your aerobic conditioning level up.
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"The reason death sticks so closely to life isn't biological necessity - it's envy. Life is so beautiful that death has fallen in love with it; a jealous, possesive love that grabs at what it can." by Yann Martel from Life of Pi
Posted by DJSapp:
"Squirrels are rats with good PR."
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