A trampoline arena system having a reduced non-reboundable area includes a mattress, an outer support element substantially surrounding and connected to an outer edge of the mattress, and an inner support element providing support to the mattress at a location interior from the outer edge of the mattress. The inner support element may be completely and contiguously surrounded by the mattress. The trampoline arena system may include first and second support members in a parallel spaced relationship, a first mattress joined to the first support member by a first plurality of springs such that at least one of the first mattress and the first plurality springs passes under the second support member, and a second mattress joined to the second support member by a second plurality of springs such that at least one of the second mattress and the second plurality of springs passes under the first support member.