An exercise apparatus comprising a base that can be oriented at any angle and that defines a plurality of connection interfaces, each of which can be designed to support one end of a resilient member in a cantilevered disposition. The connection interfaces can be positioned at or adjusted to a widely varying range of locations and angular orientations with respect to the base. Each resilient members can be configured to support one or more removable stiffening members that provide a resistance force when a force is exerted thereon so as to bend the resilient member.