Quadriga | Leg Extension & Curl Machine

Leg Extension and Lying Leg Curl in One Machine

• Train quadriceps and hamstrings while improving balance, speed, and coordination.
• Two essential exercises for balanced thigh development that help prevent muscular imbalances and support healthy knees.
• Quadriga features a heavy-duty steel frame with a 7 × 7 cm profile and 2 cm material thickness for maximum stability and focused training.
• Two pairs of handles are positioned for each exercise, allowing you to brace securely and fully engage the target muscles.
• The 70 cm seat height provides full range of motion, while the narrow front section prevents taller athletes from hitting the frame or floor with their shoes.
• Adjust to any body size with stainless steel locking screws.
• Extra-thick padding rollers reduce pressure on the shins and calves.
• Two adjustable backrest angles for leg extensions and a negatively angled pad for leg curls support ergonomic positioning.
• The chrome-plated weight sleeve is compatible with both 30 mm and 50 mm plates.
• Footprint: 144 cm depth (including transport wheels), 79 cm width, 116 cm height in leg extension mode.
• Three large rubber feet protect the floor.
• Machine weight: 69 kg.
• Maximum load capacity: 300 kg.

Exercise option 1: Lying leg curl

Benefits

• One of the most effective isolation exercises for the hamstrings, with greater muscle fiber recruitment than seated leg curls.
• Allows unilateral training so you can train one leg at a time, helping correct imbalances and reduce injury risk.

• Unlike seated leg curls, the target muscles are freer to contract. 

Body Position and Movement

• A proper setup ensures full range of motion and efficient execution.
• Fold the backrest down and lie face down on the bench.
• Keep your upper body, hips, and thighs supported by the pad.
• Position your knees so they remain free to move and align as closely as possible with the machine’s pivot point.
• Place your feet hip-width apart, with the pad resting just above the ankle at the Achilles tendon.
• Grip the handles and start the movement by bending your knees to bring the pad toward your glutes.
• Pause briefly at the top, then lower your legs under control before beginning the next repetition.
• Keep your hips and thighs in contact with the bench throughout the exercise and move only at the knee joint.

ATLETICA Tip

• Fully extend your knees at the end of each rep to activate the popliteus muscle, which starts the first 10° of knee flexion.
  
• If shortened, it can cause pain at the back of the knee.

Exercise Option 2: Leg Extension

• The leg extension trains the quadriceps, the four-headed muscle at the front of the thigh responsible for extending the knee and enabling movements such as standing up, walking, and climbing stairs.
  
• Set the backrest in the upright position. Two angle settings are available for adjustment.
• Align the pivot point of the leg module with your knee joint.
• Position your lower shins behind the pad with your knees bent at about 90°.
• Extend your knees to raise the pad until your lower legs are roughly parallel to the floor.
• Avoid fully locking out the knees and lower the weight under control after a short pause.
• Quadriga isolates the quadriceps for focused muscle activation.
• You can perform the exercise with one leg or both legs.

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