All Exercises

Knee - Extension

Strengthen your quadriceps with the bodyweight knee extension. This controlled movement improves knee joint stability and muscle activation, perfect for

Beginner
Isolation
Push
1 min per set30s rest

Description

A knee extension exercise focuses on strengthening the quadriceps muscles located in front of the thigh.

How to Do Knee - Extension

  1. 1
    Setup

    Sit tall on the edge of a sturdy chair or bench, ensuring your feet are flat on the floor and your knees are bent at approximately a 90-degree angle.

  2. 2
    Setup

    Keep your back straight and core lightly engaged, resting your hands on your thighs or by your sides for stability.

  3. 3

    Slowly extend one leg straight out in front of you by contracting your quadriceps, keeping your thigh firmly on the chair and your back upright.

  4. 4

    Briefly hold the fully extended position, squeezing your quad muscle at the top, ensuring your knee is not hyperextended or locked out.

  5. 5

    With control, slowly lower your foot back to the starting position, allowing your knee to bend back to 90 degrees.

  6. 6

    Complete all repetitions on one leg before switching to the other, maintaining a smooth and controlled tempo throughout the exercise.

Tips

  • Focus on a strong, deliberate contraction of your quadriceps at the top of the movement to maximize muscle engagement.
  • Maintain a slow and controlled tempo during both the extension and lowering phases, resisting the urge to use momentum.
  • Keep your hips stable and anchored to the seat, preventing any rocking or leaning back to isolate the quad muscles effectively.
  • Breathe out as you extend your leg and inhale as you slowly return to the starting position, coordinating your breath with the movement.

Common Mistakes

  • ×Using momentum to swing the leg up reduces quadriceps engagement; instead, perform the movement with controlled muscle activation.
  • ×Hyperextending or locking out the knee at the top can strain the joint; stop just before full lockout to protect your knee.
  • ×Leaning back or arching the lower back indicates a loss of core stability; keep your torso upright and core engaged to prevent this.

Variations

Related Exercises

Track Knee - Extension in your workouts

Log sets, reps, and weight. See your progress over time.

Get Ellim — Free