Trampoline is open to boys and girls at the recreation level only. Artistic Gymnasts are trained on trampoline in skill progressions to ease stress on the body during repetitions. Power Tumbling is open to boys and girls. Often Artistic gymnasts, active or retired, perform in this sport. Gymnasts use tumbling skills only in a straight path and must execute, without stopping, 5-8 skills in a row on a spring surface.