Experience quadriceps training revolutionized with the Nautilus One™ Leg Extension, where biomechanical precision meets cutting-edge resistance technology. This advanced lower body machine delivers unparalleled quadriceps isolation through its intelligent 4-bar linkage system and patented dial selection for complete anterior thigh development.

OPTIMAL KNEE ALIGNMENT

Engineered to maintain perfect patellar tracking throughout the full range of motion, our specialized cam system ensures safe, effective quadriceps engagement without joint stress.

ADJUSTABLE LEG PADS

Conveniently accessible from the seated position, the adjustable leg pads accommodate users of all sizes while maintaining proper biomechanical alignment for maximum muscle activation.

RECLINED SEAT ANGLE

The strategically angled seat back promotes full quadriceps contraction at peak extension while reducing hip flexor involvement for true isolation of the anterior thigh muscles.

INSTANT DIAL RESISTANCE

Effortlessly select your perfect weight with the patented dial system, offering 5-lb increments on the 250-lb stack. Optional 1-lb micro-adjustments allow for precision progressive overload.

4-BAR LINKAGE TECHNOLOGY

Our advanced linkage system provides perfectly matched resistance through every degree of extension, maintaining constant tension on quadriceps fibers for superior development.

COMMERCIAL-GRADE DURABILITY

Constructed with heavy-gauge steel and premium components to withstand constant gym use. The streamlined design ensures years of reliable performance with smooth operation.

Dimensions: W: 52" (132 cm) | L: 53" (135 cm) | H: 49" (124 cm) Weight Stack: 250 lbs (125 kg) standard Machine Weight: 729 lbs (331 kg) | Shipping Weight: 864 lbs (392 kg) SKU: S6LE

The Nautilus One™ Leg Extension represents the pinnacle of quadriceps isolation technology - where scientific biomechanics meet intuitive operation. Transform your leg development with perfect resistance matching through every degree of motion for unprecedented anterior thigh growth and definition.