Seated Hack Squat

The Dynasty Fitness DSH009 Seated Hack Squat is a plate-loaded lower body machine that trains the quadriceps as the dominant muscle through a seated bilateral squat movement, using a forward-leaning back pad angle specifically engineered to minimise glute activation and concentrate the loading on the quad. A dual-axis linear guide system with two lead rails and eight roller assemblies moves the footplate carriage smoothly through the full squat range without deviation or binding under any load within the 661 lb bilateral capacity. The oversized non-slip footplate accommodates multiple stance widths, and a clearly marked safety catch lever with pop pin operation provides safe reracking for solo training at maximum effort. Built from PT60×120×2.5mm steel in matte black, the DSH009 is built for commercial gyms, physique-focused training studios, and serious home gym setups where dedicated quad isolation in a seated machine squat is a training priority that neither a standard hack squat nor a leg press delivers in the same way.

• Seated plate-loaded hack squat with a forward-leaning back pad that deliberately reduces glute involvement and concentrates the bilateral squat stimulus on the quadriceps more directly than a standard hack squat or leg press
• Dual-axis linear guide system with two lead rails and eight roller assemblies delivers carriage travel that stays smooth and jam-free under maximum bilateral plate loading at any point in the squat depth
• 661 lb bilateral load capacity across two weight horns handles any practical quad-focused squatting programme without approaching a resistance ceiling
• Oversized non-slip footplate supports the full range of stance widths and foot placements so narrow outer-quad emphasis and wide adductor-involved positioning are both accessible without moving to a different machine

Exercise and muscles targeted

The seated hack squat occupies a specific position in the machine leg training spectrum: it produces more quad isolation than a standard hack squat because the forward-leaning back pad reduces the hip extension component of the movement, and it creates deeper knee flexion and greater VMO loading at the bottom compared to a 45-degree leg press where the seat angle limits how far the knee can travel. For bodybuilders and physique athletes specifically targeting quad sweep and VMO fullness, the DSH009's seated angle and pad configuration produces a stimulus profile that neither the standard hack squat nor the leg press can replicate.

Who this machine was built for

Serious Home Gym Builders
The DSH009 covers a very specific quad-dominant squat position that a standard hack squat and a leg press both approach but neither fully delivers. If quad development is the primary leg training priority in your home gym, the seated forward-leaning hack squat position on the DSH009 concentrates the stimulus on the quads more directly than any other single machine. At 661 lb bilateral capacity and 87.7" × 58.9", it requires committed floor space but provides a training angle that no other machine in the DSH series replicates.

Bodybuilders and Physique Athletes
Quad sweep and VMO fullness are the two most visually impactful quad characteristics in competitive physique, and both respond best to deep knee flexion under load at a quad-dominant body angle. The DSH009's forward-leaning back pad reduces glute involvement so the quad works as the sole primary driver, and the low foot placement option on the oversized footplate allows the deepest practical knee flexion available from a seated machine squat. This combination produces the VMO time-under-tension that flat-footed leg pressing at a shallow angle cannot match.

Powerlifters and Strength Athletes
Quad strength through deep knee flexion is the limiting factor for many powerlifters at the bottom of the competition squat. The DSH009 trains this specific knee angle with heavy bilateral plate loading in a controlled machine environment, making it a targeted accessory tool for deepening squat strength at the sticking point without the technical and safety demands of barbell work at submaximal depth.

Commercial Gym Owners and Operators
A seated hack squat machine offers a quad-training angle that is meaningfully different from the standard hack squat and leg press machines that most facilities already stock. Members who train legs seriously notice and use the difference in pad angle and movement path. The DSH009's matte black finish and PT60×120×2.5mm frame construction position it in the premium plate-loaded tier, and the eight-roller dual-axis carriage delivers a carriage quality that members can feel during the first rep of their first session.

University and College Athletic Departments
Deep bilateral knee flexion strength is directly relevant to athletic deceleration, jump landing mechanics, and sprint start positioning. The DSH009 allows this specific strength quality to be trained in a controlled machine environment at high loads without the barbell technique supervision demand, making it practical for team sessions where multiple athletes rotate through the station independently.

Private Personal Training Studios
The clearly marked safety catch lever and pop pin operation make the DSH009 practical for solo client training without the trainer needing to physically assist reracking at the end of a set. The adjustable handle frame accommodates different torso lengths and arm reaches, and the forward-leaning pad angle self-positions the client in the correct quad-dominant squatting position without the trainer needing to manually correct hip angle during the set.

Owners Manual