In a basement application (home gym + ping pong area), do you suggest securing the seams or perimeter of the Eco rolls with any kind of adhesive or two-sided tape?

Our Eco-Flec Rolls, in most instances, can be loose laid. Since they are pretty heavy, it does take some force to move the rolls. If you are doing some strenuous activity on the floor such as playing ping pong or have a home gym, for most home gyms all that is needed is some double-sided tape to ensure the rolls don't move.