The sidewalker is directly responsible for the rider. Sidewalkers are an extension of the instructor. The sidewalker walks a fine line between assisting and helping too much. We will train sidewalkers in appropriate ways to physically assist riders, and ways to be effective in helping them to better follow directions, stay on task, etc.
Sidewalking can be physically straining on the arms, since you will spend a large share of your time with your arm(s) over your should while assisting the rider. Sidewalkers often develop a very special bond with his/her rider.