10 Best Leg Extensions Alternatives for Knee Pain or No Machine

Ranked Leg Extensions Alternatives

10 substitutes, ranked by how closely each one matches Leg Extensions on movement pattern, muscles worked, equipment and body position. The higher the score, the less you change. Open "How to perform this exercise" on a card for the steps; every card title links to that exercise's own alternatives page. Harder versions are tagged as progressions and kept out of the top spot even when they score higher.

1. Best match

   Play demonstration

   1. Lever Leg Extension

   94% match

   • Quads
   • Lever
   • Beginner
   • Isolation

   A good swap when you have a lever machine to work with, and it still works the quads.

   How to perform this exercise

   1. Adjust the seat height and backrest of the machine to fit your body.
   2. Sit on the machine with your back against the backrest and your feet on the footpad.
   3. Grasp the handles or sidebars for stability.
   4. Extend your legs forward by straightening your knees, lifting the weight.
   5. Pause for a moment at the top, then slowly lower the weight back to the starting position.
   6. Repeat for the desired number of repetitions.

   Sets and reps: 3 sets of 10 to 15 reps.

   Why this matches

   • Movement: extension, the same as Leg Extensions
   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: seated, the same as Leg Extensions
2. Play demonstration

   2. Resistance Band Leg Extension

   83% match

   • Quads
   • Band
   • Beginner
   • Isolation

   A good swap when you have a band to work with, and it still works the quads.

   How to perform this exercise

   1. Attach the resistance band to a sturdy anchor point and secure it around your ankle.
   2. Stand facing the anchor point with your feet shoulder-width apart.
   3. Keeping your core engaged and your upper body stable, extend your leg straight out in front of you.
   4. Pause for a moment at the top, then slowly return your leg to the starting position.
   5. Repeat for the desired number of repetitions, then switch legs.

   Sets and reps: 3 sets of 10 to 15 reps.

   Why this matches

   • Movement: extension, the same as Leg Extensions
   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a band, not a machine
   • Body position: seated, the same as Leg Extensions
   • Balance: harder to stay steady on than Leg Extensions
3. 

   Progression

   3. Single-leg Leg Extension

   70% match

   • Quadriceps
   • Machine
   • Beginner
   • Isolation

   A looser match: it uses the same equipment, but it works the quadriceps rather than the quads.

   How to perform this exercise

   1. Seat yourself in the machine and adjust it so that you are positioned properly. The pad should be against the lower part of the shin but not in contact with the ankle. Adjust the seat so that the pivot point is in line with your knee. Select a weight appropriate for your abilities.
   2. Maintaining good posture, fully extend one leg, pausing at the top of the motion.
   3. Return to the starting position without letting the weight stop, keeping tension on the muscle.
   4. Repeat for the desired number of repetitions.

   Sets and reps: 3 sets of 10 to 15 reps on each side.

   Why this matches

   • Movement: extension, the same as Leg Extensions
   • Primary muscle: quadriceps, not quads
   • Equipment: a machine, the same as Leg Extensions
   • Body position: seated, the same as Leg Extensions
4. 

   Progression

   4. Leg Press

   66% match

   • Quads
   • Machine
   • Beginner
   • Compound

   Pick this when you want a harder version that still works the quads.

   How to perform this exercise

   1. Using a leg press machine, sit down on the machine and place your legs on the platform directly in front of you at a medium (shoulder width) foot stance. (Note: For the purposes of this discussion we will use the medium stance described above which targets overall development; however you can choose any of the three stances described in the foot positioning section).
   2. Lower the safety bars holding the weighted platform in place and press the platform all the way up until your legs are fully extended in front of you. Tip: Make sure that you do not lock your knees. Your torso and the legs should make a perfect 90-degree angle. This will be your starting position.
   3. As you inhale, slowly lower the platform until your upper and lower legs make a 90-degree angle.
   4. Pushing mainly with the heels of your feet and using the quadriceps go back to the starting position as you exhale.
   5. Repeat for the recommended amount of repetitions and ensure to lock the safety pins properly once you are done. You do not want that platform falling on you fully loaded.

   Sets and reps: 3 or 4 sets of 6 to 10 reps.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: seated, the same as Leg Extensions
5. 

   Progression

   5. Hack Squat

   57% match

   • Quads
   • Machine
   • Intermediate
   • Compound

   How to perform this exercise

   1. Place the back of your torso against the back pad of the machine and hook your shoulders under the shoulder pads provided.
   2. Position your legs in the platform using a shoulder width medium stance with the toes slightly pointed out. Tip: Keep your head up at all times and also maintain the back on the pad at all times.
   3. Place your arms on the side handles of the machine and disengage the safety bars (which on most designs is done by moving the side handles from a facing front position to a diagonal position).
   4. Now straighten your legs without locking the knees. This will be your starting position. (Note: For the purposes of this discussion we will use the medium stance described above which targets overall development; however you can choose any of the three stances described in the foot positioning section).
   5. Begin to slowly lower the unit by bending the knees as you maintain a straight posture with the head up (back on the pad at all times). Continue down until the angle between the upper leg and the calves becomes slightly less than 90-degrees (which is the point in which the upper legs are below parallel to the floor). Inhale as you perform this portion of the movement. Tip: If you performed the exercise correctly, the front of the knees should make an imaginary straight line with the toes that is perpendicular to the front. If your knees are past that imaginary line (if they are past your toes) then you are placing undue stress on the knee and the exercise has been performed incorrectly.
   6. Begin to raise the unit as you exhale by pushing the floor with mainly with the heel of your foot as you straighten the legs again and go back to the starting position.
   7. Repeat for the recommended amount of repetitions.

   Sets and reps: 3 or 4 sets of 6 to 10 reps.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: standing, not seated
6. Play demonstration

   6. Lever Alternate Leg Press

   57% match

   • Quads
   • Lever
   • Intermediate
   • Compound

   Pick this when you want a harder single-leg version that still works the quads.

   How to perform this exercise

   1. Adjust the seat and foot platform of the leverage machine to your desired position.
   2. Sit on the machine with your back against the backrest and your feet on the foot platform.
   3. Place your hands on the handles or sides of the machine for stability.
   4. Push one foot against the foot platform, extending your leg until it is almost fully straight.
   5. Pause for a moment, then slowly bend your leg and return to the starting position.
   6. Repeat with the other leg.
   7. Continue alternating legs for the desired number of repetitions.

   Sets and reps: 3 or 4 sets of 6 to 10 reps on each side.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: seated, the same as Leg Extensions
7. 

   Progression

   7. Chair Squat

   57% match

   • Quads
   • Machine
   • Beginner
   • Compound

   How to perform this exercise

   1. To begin, first set the bar to a position that best matches your height. Once the bar is loaded, step under it and position it across the back of your shoulders.
   2. Take the bar with your hands facing forward, unlock it and lift it off the rack by extending your legs.
   3. Move your feet forward about 18 inches in front of the bar. Position your legs using a shoulder width stance with the toes slightly pointed out. Look forward at all times and maintain a neutral or slightly arched spine. This will be your starting position.
   4. Slowly lower the bar by bending the knees as you maintain a straight posture with the head up. Continue down until the angle between the upper and lower leg breaks 90 degrees.
   5. Begin to raise the bar as you exhale by pushing the floor with the heels of your feet, extending the knees and returning to the starting position.
   6. Repeat for the recommended amount of repetitions.

   Sets and reps: 3 or 4 sets of 6 to 10 reps.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: standing, not seated
8. Play demonstration

   8. Smith Chair Squat

   53% match

   • Quads
   • Smith-machine
   • Beginner
   • Compound

   How to perform this exercise

   1. Adjust the height of the smith machine bar to a comfortable position.
   2. Stand with your feet shoulder-width apart, toes slightly turned out.
   3. Place the barbell across your upper back, resting it on your traps.
   4. Engage your core and keep your chest up as you slowly lower your body by bending your knees and hips.
   5. Continue lowering until your thighs are parallel to the ground, or as low as you can comfortably go.
   6. Pause for a moment, then push through your heels to return to the starting position.
   7. Repeat for the desired number of repetitions.

   Sets and reps: 3 or 4 sets of 6 to 10 reps.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: standing, not seated
9. 

   9. Smith Machine Squat

   53% match

   • Quads
   • Smith-machine
   • Intermediate
   • Compound

   How to perform this exercise

   1. To begin, first set the bar on the height that best matches your height. Once the correct height is chosen and the bar is loaded, step under the bar and place the back of your shoulders (slightly below the neck) across it.
   2. Hold on to the bar using both arms at each side (palms facing forward), unlock it and lift it off the rack by first pushing with your legs and at the same time straightening your torso.
   3. Position your legs using a shoulder width medium stance with the toes slightly pointed out. Keep your head up at all times and also maintain a straight back. This will be your starting position. (Note: For the purposes of this discussion we will use the medium stance which targets overall development; however you can choose any of the three stances discussed in the foot stances section).
   4. Begin to slowly lower the bar by bending the knees as you maintain a straight posture with the head up. Continue down until the angle between the upper leg and the calves becomes slightly less than 90-degrees (which is the point in which the upper legs are below parallel to the floor). Inhale as you perform this portion of the movement. Tip: If you performed the exercise correctly, the front of the knees should make an imaginary straight line with the toes that is perpendicular to the front. If your knees are past that imaginary line (if they are past your toes) then you are placing undue stress on the knee and the exercise has been performed incorrectly.
   5. Begin to raise the bar as you exhale by pushing the floor with the heel of your foot as you straighten the legs again and go back to the starting position.
   6. Repeat for the recommended amount of repetitions.

   Sets and reps: 3 or 4 sets of 6 to 10 reps.

   Why this matches

   • Primary muscle: quads, the same as Leg Extensions
   • Equipment: a machine, the same as Leg Extensions
   • Body position: standing, not seated
10. 

    10. Leverage Deadlift

    52% match

    • Quads
    • Machine
    • Intermediate
    • Compound

    How to perform this exercise

    1. Load the pins to an appropriate weight. Position yourself directly between the handles. Grasp the bottom handles with a comfortable grip, and then lower your hips as you take a breath. Look forward with your head and keep your chest up. This will be your starting position.
    2. Return the weight to the starting position.

    Sets and reps: 3 or 4 sets of 6 to 10 reps.

    Why this matches

    • Primary muscle: quads, the same as Leg Extensions
    • Equipment: a machine, the same as Leg Extensions
    • Body position: standing, not seated