Appears in642 Workouts*

Stability-Ball Seated Knee Extension

Strengthen your quads with Stability-Ball Seated Knee Extensions! Improve leg strength and balance with this effective exercise.

The Stability-Ball Seated Knee Extension mainly works the quads, with help from the core. You'll need: exercise ball.

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Required Equipment

Exercise Ball
Exercise Ball

Stability-Ball Seated Knee Extension Muscles Worked

Primary

Quads (quadriceps femoris)

Secondary

Abdominals (rectus abdominis)

How to do the Stability-Ball Seated Knee Extension

Exercise Name: Sitting Knee Extension on a Stability Ball

Equipment: Stability ball

Positioning:

  1. Begin by selecting a suitable stability ball size that allows you to sit comfortably with your feet flat on the ground.

  2. Sit on the stability ball, ensuring your feet are approximately shoulder-width apart and flat on the floor.

  3. Keep your back straight and engage your core muscles for stability. Your knees should be at a 90-degree angle.

Movement Instructions:

  1. While maintaining your seated position, extend your right leg out straight in front of you, keeping your foot flexed and toes pointed upward.

  2. Hold the extended position for a moment, feeling the contraction in your quadriceps (front thigh muscles).

  3. Slowly lower your leg back to the starting position, keeping control throughout the movement.

  4. Repeat the leg extension for 10 to 15 repetitions on your right leg.

  5. Switch to your left leg and repeat the same steps.

  6. Complete 2 to 3 sets on each leg, resting briefly between sets.

Tips:

  • Focus on controlled movements rather than speed.

  • Ensure your core is engaged to help maintain balance.

  • If you feel unstable, place your feet a little wider or position yourself closer to a wall for support.

Stability-Ball Seated Knee Extension FAQs

What muscles does the Stability-Ball Seated Knee Extension work?

The Stability-Ball Seated Knee Extension mainly works the quads, with help from the core. The main muscles are the quadriceps femoris.

What equipment do you need for the Stability-Ball Seated Knee Extension?

Exercise ball.

What workout day should the Stability-Ball Seated Knee Extension go on?

It belongs on leg day in a push/pull/legs routine.

What are some Stability-Ball Seated Knee Extension variations and alternatives?

Similar exercises include the Dumbbell Seated Leg Extension, Exercise Ball Wall Squat, Knee Articulation Extension and Knee Extension.

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