What is the best way 2 sit on a single tube?

Question

-stomach?

-knees?

Answer 1

Never on knees. If you are tubing behind a boat. Real tubing means you are going fast and hitting waves so you go flying. either on stomach or literally sit back in the tube. Battle tubing is the best!

Answer 2

On an inner tube?

Valve side down.

"Truck" or  "small tractor" sized tubes work well for most people. For a kid or a girl, maybe an "auto" size tube. Don't use one too large.

Arms hanging over the sides so that the hands and forearms can be used to paddle.

Butt hanging in the centre of the tube to balance your body so you can see over your knees. Tube under your flexed knees so that your heels skim the water. Be careful and have fun!