Knee - Extension - Articulations
- Músculo objetivo
- Quadriceps
- Equipamiento
- Body weight
- Parte del cuerpo
- Thighs
- Tipo
- Stretching
Knee extension articulations are a controlled mobility drill — often called a knee CAR (controlled articular rotation) — that moves the lower leg through its full flexion-to-extension range under active muscular control. The quadriceps are the primary driver on the extension phase, while the drill lubricates the knee joint, reinforces end-range control, and reduces stiffness. It fits naturally in a warm-up, cool-down, or dedicated mobility session.
Cómo hacer el Knee - Extension - Articulations
- 1Sit on the edge of a bench or sturdy chair with your thighs fully supported and your lower legs hanging freely.
- 2Sit tall, brace your core lightly, and plant both hands on the bench beside your hips to keep your torso upright.
- 3Begin with the working leg hanging at roughly 90° of knee flexion — this is your start position.
- 4Slowly extend your knee, driving your heel forward and upward until your leg is as straight as you can comfortably reach, squeezing the quadriceps at the top.
- 5Pause for one to two seconds at full extension, feeling active tension in the quadriceps.
- 6Lower your lower leg back down under control to the 90° start position, resisting gravity the entire way.
- 7Complete all reps on one leg before switching to the other.
Consejos de técnica
- Move as slowly as possible in both directions — the goal is neuromuscular control, not momentum. A 3-second lift and 3-second lower is a good target.
- At full extension, actively contract your quadriceps rather than relying on a passive lock-out; this trains the muscle through its shortened range.
- Keep your thigh pressed into the bench throughout the rep so the movement is isolated to the knee joint rather than the hip.
- If you feel pain — not discomfort — in the knee joint, reduce your range of motion and work only within a pain-free arc.
Errores comunes
- Using momentum to swing the leg up rather than contracting the quadriceps, which removes the controlled-tension benefit of the drill.
- Letting the thigh lift off the bench, which shifts the work to the hip flexors and reduces isolation at the knee joint.
- Rushing through the range of motion — hurrying prevents you from exploring true end-range control, which is the purpose of the exercise.
- Stopping short of full extension, which limits the mobility benefit and leaves the quadriceps undertrained at their shortest position.
Preguntas frecuentes
What muscles do knee extension articulations work?
The quadriceps (rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius) are the primary muscles driving knee extension. Because this is a mobility drill with no external load, the emphasis is on active control across the joint's full range rather than strength output.
How is this different from a machine leg extension?
A machine leg extension uses external resistance to build quadriceps strength, while knee articulations are bodyweight-only and focus on joint lubrication, end-range neuromuscular control, and mobility. Think of articulations as joint maintenance rather than muscle building.
How many reps and sets should I do?
For a mobility warm-up or cool-down, 2–3 sets of 5–10 slow, controlled reps per leg is typical. Prioritize quality and a full range of motion over rep count.
Is this exercise suitable for people with knee problems?
Gentle, pain-free articulations are commonly used in rehabilitation settings to restore range of motion and reduce stiffness. That said, always work within a pain-free range and consult a physiotherapist before starting if you have an existing knee condition or recent injury.
When is the best time to do knee extension articulations?
They work well at the start of a lower-body session to warm up the knee joint, at the end of a session to promote recovery, or on rest days as part of a dedicated mobility routine.
