In some health clubs you can relax in a hot tub after you exercise, but with this new combo called the FitWet Jet Bike, you can actually do both at the same time.

The Jet Bike uses the fact that water provides about four times as much resistance to movement than air to pump up the aerobic effort of your workout. You still pedal just like you would on a regular stationary bike, but it takes a lot more effort to keep things going.

As with most luxury workout machines, the Jet Bike comes with a bunch of accessories to keep you from getting bored as you get fit. You get a touchscreen TV and control panel to measure your workout, a towel rack, and a cup holder so you can add back those calories just as fast as you burn them off.

At $18,000, the Jet Bike is a bit much for all but the richest exercise freaks, so most of these will likely end up in fancy health clubs. Nobody is going to want to reuse the last person's sweaty water, so the Jet Bike will have to be refilled between each user. Changing the water means about seven minutes of downtime between each user, which seems like it could be a problem in a busy gym.

Check out the incredibly over-the-top video, which appears to be entirely animated with no actual machines in sight. In the gallery you can see a real Jet Bike, so they do exist, but I can promise you that the Manhattan health spa shown in the video is just a neat looking concept at this point.

FitWet, via Born Rich