Life Fitness Horizontal Leg Press, Model SF90, Code (015-2446) – Explosive leg strength without strain on the back

Expert Review: SF90 Series Seated Leg Press

Compound movements like the leg press are the foundation for building muscle in the lower body. The SF90 Seated Leg Press utilizes advanced biomechanics to deliver the benefits of a heavy leg workout without the risks of free weights.

Spinal biomechanics and safety:

The greatest advantage of the SF90 model over the 45-degree leg press or the squat is the elimination of vertical pressure on the spine. On this machine, the athlete is positioned in a seated posture with full back support and applies force horizontally. This position allows even those with herniated discs or chronic back pain to train with heavy weights and challenge their leg muscles.

Footplate design and exercise variety:

The press plate on this machine is designed to be very wide and large. This feature allows the athlete to target different muscles by changing the position of the legs:

• Lower legs: Focus more on the quadriceps.

• Legs up: Focus more on the glutes and hamstrings.

• Legs open: engages the inner thigh. The plate also has an anti-slip texture to ensure the user’s safety at maximum pressures.

Smooth motor system:

The movement mechanism of this machine is designed based on precise linear rails and industrial bearings. This system ensures that the seat (or pressure plate) moves smoothly and with minimal friction. This smoothness of movement is critical to ensuring the knee joints are not exposed to sudden shocks and that muscle tension remains constant throughout the entire range of motion.

Ergonomics and adjustments:

The seat of the machine is easily adjustable to allow people with different leg lengths to experience a full range of motion. The handles on the side of the seat help the user to fix their body in the seat and maintain pelvic stability during the push-up.