hammer strength

Iso-Lateral Leg Extension

Name: Plate Loaded Iso-Lateral Leg Extension
Brand: hammer strength

The Hammer Strength Iso-Lateral Leg Extension is built to strengthen one of the most fundamental movement patterns—knee extension. Whether sprinting, jumping, or powering through change of direction, explosive quad strength is critical. This plate loaded leg extension machine isolates each leg independently, reinforcing balance, control, and unilateral strength.

It's not just about building muscle, it's about building the kind of force that drives athletic performance and protects joints through every stride, lunge, and lift in sport and life.

Dimensions (L x W x H): 65 x 60 x 54 in (165 x 152 x 137 cm)

Product Weight: 300 lb (136 kg)

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A Leg Extension That Feels Right

The two angled pads lock the user in for maximum comfort during a leg extension workout, even when going heavy. The angled back pad and seat belt keep the athlete stable and focused on what muscles leg extensions work. No distractions, no discomfort—just pure performance while pushing through every set with power and precision. Perfect for athletes who demand comfort without sacrificing intensity.

Optimized Natural Movement

The 4-degree outward angle of the work-arms keeps legs moving in a natural path during each leg extension exercise, giving a smoother, more controlled rep every time. This design addresses concerns about whether leg extensions are bad for knees by matching the way the body moves, reducing stress on joints so the user can train harder, longer, and without unnecessary strain.

Product Configurator

Customize your own Leg Extension

Customize your equipment like never before with our 3D configurator tool, featuring augmented reality to visualize and drop your design directly into your space.

Specs

Dimensions (L x W x H)	65 x 60 x 54 in (165 x 152 x 137 cm)
Product Weight	300 lb (136 kg)
Max Load Capacity	3 x 45 lb plates (3 x 20 kg plates)

Starting Resistance (per arm)	4 lb (1.8 kg)
Product Code	IL-LE

FAQ

The 4-degree outward angle is designed to better align with the natural tracking of the knee joint during the leg extension exercise. This promotes safer mechanics, reduces joint stress, and allows for a more natural, effective movement—especially important when lifting heavy or training frequently. This design helps address concerns about whether leg extensions are bad for the knees.

Our Iso-Lateral design enables independent leg movement, promoting balanced strength development and reducing compensation patterns. No lock is necessary because our design supports both unilateral and bilateral training, offering versatility without compromising biomechanics or durability. It also eliminates mechanical locking points, reducing maintenance needs and wear over time.

Yes, the adjustable back pad on this seated leg extension machine makes it easy to dial in the correct positioning for a wide range of users, ensuring proper biomechanics and a more effective leg extension workout.

Leg extension is a key movement in nearly every sport—whether it’s sprinting, jumping, or changing direction. Strengthening this motion helps athletes build lower-body power and joint stability, both critical for performance and injury prevention. It’s a foundational movement with direct carryover to game-day demands.