Take your workout out of the gym and into nature at Sarueonshi Park. It's the ideal spot to do some situps, crunches or a bit of yoga.
You'll find Sarueonshi Park in the riverside ward of Koto. Entry here is free, so you can leave your money zipped up in your daypack. While you're in the area, why not tick off some other interesting sights, such as Disneyland® Tokyo, Tokyo Sky Tree and Tokyo Tower?