A training apparatus designed to improve the physical readiness level of the low back and pelvic girdle of an individual includes a frame, a seat, a pivot mechanism mounted on the frame and providing a pivot point, an exercise arm rotatable about the pivot point, and a resistance assembly rotatable about the pivot point. The method involves using a graded reduced-oxygen CuZn alloy as fill for the via in forming the dual-inlaid interconnect structure. In another embodiment, the design is an individual compact.