Force USA Solitude Leg Press / Calf Raise Machine | Fitness Specialist TXForce USA Solitude Leg Press Calf Raise Commercial Dual Function Lower Body Machine The Force USA Solitude Leg Press Calf Raise Machine is a full commercial grade, dual function lower body unit engineered to deliver powerful, isolated training for the quadriceps, glutes, and calves. Built with oversized steel framing, smooth linear bearings, and a precision driven footplate system, this machine provides consistent, repeatable movement patterns