I have an ElliptiGO. It's a standup bicycle. You don't pedal; you stride on it. It allows me to have the same striding motion as running without the impact.
A lot of ultramarathoners are soloists. They're single and live lives off the grid.
The only one who can tell you "You can't" is you. And you don't have to listen.-Nike
Any goal worth achieving involves an element of risk.
Running is about finding your inner peace, and so is a life well lived.
If you just go out there and run 100 miles, it breaks down a lot of barriers in terms of self-imposed limitations.