Lying Single Leg Extension
Lying Single Leg Extension Exercise Description
Lying Single Leg Extension is a floor-based knee extension that targets the quadriceps of one leg at a time. You’ll lie on your back and straighten the working knee by sliding the heel away, then return under control. The primary movers are the quadriceps (rectus femoris, vastus medialis, vastus lateralis, vastus intermedius), while the abdominal wall and hip stabilizers maintain a neutral pelvis and prevent unwanted motion. This open‑chain style movement emphasizes patellar tracking and terminal knee extension without external load, making it useful for practicing clean alignment and motor control. Move through a comfortable, controlled range and focus on smooth, pain‑free motion and precise knee‑over‑toe alignment.
- Muscle Groups: Quads
- Target Muscles: Vastus Intermedius, Vastus Lateralis, Vastus Medialis
- Assisting Muscles: Rectus Femoris
- Stabilizing Muscles: External Obliques, Gluteus Medius, Gluteus Minimus, Rectus Abdominis, Transversus Abdominis
- Body Area: Lower Body
- Body Parts: Legs, Upper Legs
- Body Surface: Front, Inner, Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Knee Extensors
- Joint Involvement: Single-joint
- Muscle Location: Deep Quad, Inner Quad, Outer Quad
- Movement Direction: Other
- Muscle Position: Anterior, Lateral, Medial
- Gender: Female
How To Do The Lying Single Leg Extension Exercise
‘- Lie on your back with knees bent, feet hip‑width, arms relaxed at sides.
– Set a neutral spine: ribs down, pelvis level, light abdominal brace.
– Choose the working leg; place that heel under the knee with the foot flat or lightly resting, toes pointing up.
– Keep the non‑working leg bent with foot planted to help stabilize your pelvis.
– Dorsiflex the working ankle (toes toward shin) and center your kneecap so it faces the ceiling.
– Slide the working heel slowly away from your body, straightening the knee until the leg is long on the floor without locking or hyperextending.
– At full extension, gently tighten the quadriceps (think “draw the kneecap up”) while keeping the thigh resting and hips level.
– Reverse the motion: slide the heel back in, bending the knee under control while maintaining knee‑over‑second‑toe alignment.
– Keep both hips square; avoid pelvic tilt, hip rotation, or arching the lower back.
– Breathe steadily—exhale as you extend, inhale as you return.
– Switch legs and repeat the same controlled pattern on the other side.
Lying Single Leg Extension Tips
‘- Maintain a neutral spine with ribs down, pelvis level, and a light abdominal brace throughout.
– Keep the non‑working leg bent with the foot planted to help stabilize your pelvis.
– Dorsiflex the working ankle (toes toward your shin) before you start sliding the heel.
– Center the working kneecap so it faces straight up toward the ceiling to promote clean alignment.
– Slide the working heel away slowly, straightening the knee without locking or hyperextending.
– At full extension, gently tighten the quadriceps as if drawing the kneecap up while keeping the thigh relaxed on the floor.
– Maintain knee‑over‑second‑toe alignment as you extend and as you slide the heel back in.
– Keep both hips square and level; avoid pelvic tilt, hip rotation, or arching your lower back.
– Move through a comfortable, controlled range with smooth, pain‑free motion.
– Breathe steadily, exhaling as you extend the leg and inhaling as you return.
Lying Single Leg Extension Beginner Introduction
In Lying Single Leg Extension, the action takes place on the floor and centers on straightening one knee at a time to challenge the front of the thigh. The person rests on the back while one heel glides away from the body and then returns, so the working leg lengthens and bends along the ground rather than bearing bodyweight or using extra resistance. The opposite leg stays bent, giving a stable base for the movement.
This exercise highlights precise control around the knee joint. The front thigh muscles create the straightening effort, while the stomach area and hips quietly steady the pelvis and lower back so the rest of the body remains calm. Attention goes to the smooth path of the kneecap and the final part of knee straightening, along with a gentle, controlled glide of the heel. As a result, it suits practice of clean leg alignment, mindful knee‑over‑toe positioning, and deliberate, pain‑free motion.