Trainers are interesting devices. These simulate an activity, and provide great exercise but without actually doing said activity. In other words a bicycle trainer lets you ride a bike and put in miles while you go nowhere. A cross-country ski machine needs no snow, and rowing machines need no water.
Keeping with the waterless concept the Vasa Trainer Pro is a swim simulator for those who don’t want to get wet – at least until you work up a sweat and then later hit the showers. It uses the same principal of a Nordic Track with pulleys and cables and your own body weight to provide the resistance.
httpv://youtu.be/r2IwmMymn5Q
You essentially lie on the bench and make the motion you could in the water, and used correctly you can get a good workout while helping your in-water performance. No swimsuit required.