[Mr. K]

when re they going to make a “wheel” shaped spacecraft so they can artifically create at least SOME gravity

[Yo-Yo]

Resistive Overload Combined with Kinetic what?!?

[IronJack]

How about some bungee cords and a couple of eyebolts welded to the interior of the craft? It may not be Gold’s Gym, but the resistance should keep you from turning into a gersh on the trip. You can work arms, legs, back, even abs to some degree. Add more (or stiffer) cords to increase the resistance.

You can even call them Space Bungees and charge NASA $100,000 apiece for them.

[katana]

This is the device they're putting on the IST, the "MED-2". Its launch weight is 65 lbs. or about one half that of a female astronaut. And God only knows what it costs. The ROCKY device looks like it works on the same principle but its housed in a black cube. For the life of me I don't see where either of them couldn't be replaced by a set of elastic tubes, handles, and a few securing points on a bulkhead. Cost: a few dollars. Launch weight: almost nothing.

[minnesota_bound]

Copy this design.

[Mr. Blond]

What about a Bowflex?

[pa_dweller]

That's all well and good, the limb muscles will be maintained. But, there's this: Possible Mars Mission 'Showstopper': Vision Risks for Astronauts. Looks like they'll need a flywheel a la 2001: Space Odyssey.

[GreenHornet]

Rocky exercise device will help keep deep space a fit place

YO ADRIAN!!!