Exercise guide
Resistance Band Seated Single Leg Knee Extension
- Intermediate
- Isolation
- Rep-based
- Upper legs
- Waist
This isolation exercise specifically targets the quadriceps, providing constant tension to improve knee stability and muscle definition through a full range of motion.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Secure one end of the resistance band to a low anchor point behind you, such as the leg of a bench or a dip station post.
- Sit on the edge of the bench with an upright posture and loop the other end of the band around your right ankle.
- Position the bench far enough from the anchor so the band is taut when your knee is bent at a 90-degree angle.
- Grip the sides of the bench firmly with both hands to stabilize your hips and torso.
How to do it
- Exhale as you slowly extend your leg forward until the knee is fully straight, focusing on the contraction in your thigh.
- Squeeze your quadriceps hard at the top of the movement for a one-second pause.
- Inhale as you slowly return your foot to the starting position, resisting the pull of the band to maintain control.
- Perform the desired number of repetitions on one leg before switching the band to the other ankle.
Form checklist
- Keep your back straight and avoid leaning backward to compensate for the resistance.
- Ensure the movement occurs only at the knee joint while keeping your thigh pressed against the bench.
- Avoid 'kicking' the weight up; use a smooth, controlled tempo for both phases of the lift.
- Maintain tension on the band at the bottom of the movement—do not let it go slack.
Pro tips
- To maximize activation of the vastus medialis (teardrop muscle), ensure you reach absolute terminal knee extension with a hard peak squeeze.
- Point your toes slightly outward to shift more emphasis onto the inner quadriceps.
Make it harder
- Increase the distance between the bench and the anchor point to heighten the resistance at the start of the rep.
- Implement a 3-5 second eccentric (lowering) phase to increase time under tension and muscle fiber recruitment.
Frequently asked
- What muscles does the resistance band seated single leg knee extension work?
- The resistance band seated single leg knee extension primarily targets the quadriceps, and also works the abs and hip flexors as secondary muscles.
- What equipment do you need for the resistance band seated single leg knee extension?
- The resistance band seated single leg knee extension uses resistance band.
- Is the resistance band seated single leg knee extension good for beginners?
- The resistance band seated single leg knee extension is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.