Walking Tennis can be played indoors on a badminton size court or outdoors on a traditional tennis court. The rules are not too far removed from the traditional game but we've adapted them to make the game more accessible.
No running or jumping is permitted. Running or jumping is deemed to be when both feet leave the ground at the sametime.
In Walking Tennis you can serve underarm or overarm. The main thing to remember is that the second bounce can land within the tramline (doubles court).
In Walking Tennis you have an OPTION of a second bounce. However if the second bounce lands outside of the court (singles lines for singles and doubles line for doubles), the ball is deemed to be out.