45 Degrees Lean Back Alternate Knee Raise
45 Degrees Lean Back Alternate Knee Raise Exercise Description
The 45° Lean-Back Alternate Knee Raise is a seated, bodyweight core exercise that pairs a fixed trunk angle with controlled, alternating hip flexion. Leaning the torso back to roughly 45 degrees increases the anti-extension demand on the rectus abdominis while the external and internal obliques keep the pelvis level and resist unwanted rotation as each leg moves. Alternating knee lifts primarily use the hip flexors, with the abdominal wall bracing to maintain a neutral spine, ribs down, and steady head/neck position. Because the trunk remains quiet while the hips move, the drill reinforces lumbopelvic control, balance, and coordination without requiring equipment. Proper scapular set (shoulders down and back) and smooth breathing further support trunk stability and motion control throughout the set.
- Muscle Groups: Hips
- Target Muscles: Iliacus, Psoas Major
- Assisting Muscles: Rectus Femoris, Sartorius, Tensor Fasciae Latae
- Stabilizing Muscles: External Obliques, Internal Obliques, Rectus Abdominis, Rhomboid Major, Transversus Abdominis
- Body Area: Lower Body
- Body Parts: Hips, Legs, Upper Legs
- Body Surface: Front
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Hip Flexors
- Joint Involvement: Single-joint
- Muscle Location: Hip Flexor
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Male
How To Do The 45 Degrees Lean Back Alternate Knee Raise Exercise
‘- Sit on the floor with knees bent and feet flat, hip-width apart.
– Place hands lightly on the floor just behind your hips, fingers forward; depress and slightly retract the shoulder blades.
– Brace the abdominal wall 360° and lean your torso back to about 45°, keeping a long neutral spine and ribs down.
– Keep the chin tucked and gaze forward; avoid craning the neck.
– Press gently through the hands to stabilize without dumping weight into the wrists.
– Lift the right knee toward the chest by flexing the hip; keep the pelvis level and the trunk quiet.
– Lower the foot with control to the start position.
– Lift the left knee in the same manner; alternate sides smoothly.
– Exhale during each knee lift; inhale as you lower.
– Maintain steady tempo and range you can control without lumbar rounding or torso rotation.
45 Degrees Lean Back Alternate Knee Raise Tips
‘- Lean your torso back to about 45° while keeping a long, neutral spine with ribs down.
– Lightly brace the abdominal wall 360° before and during the alternating knee raises.
– Set your shoulders down and slightly back, with hands just behind your hips, fingers pointing forward.
– Press gently through your hands for stability without dumping your weight into the wrists.
– Keep your chin tucked and gaze forward to avoid craning the neck.
– Lift each knee by flexing the hip, keeping the pelvis level and the trunk quiet as the leg moves.
– Alternate knee lifts smoothly, lowering each foot back to the start position with control.
– Exhale as you lift each knee and inhale as you lower the foot.
– Use only a tempo and range of motion you can control without lumbar rounding or torso rotation.
[Continue only as needed for precise execution]
45 Degrees Lean Back Alternate Knee Raise Beginner Introduction
The 45° Lean-Back Alternate Knee Raise is a seated bodyweight core move that blends a fixed backward torso angle with alternating leg motion. With the upper body reclined to around a forty-five degree angle and the hands lightly supporting behind the hips, the midsection works hard to prevent arching or twisting while each knee travels toward the chest. The abs and side abs brace to hold the spine in its natural curve and maintain stable hips, while the hip flexors drive the lifting action of the legs. Shoulders relaxed and gently drawn back plus a steady head and gaze contribute to an overall sense of solid, controlled posture.
This exercise emphasizes calm, controlled movement from the hips while the trunk remains steady, which reinforces control around the lower back and pelvis, balance in a seated position, and smooth right-to-left coordination. A consistent breathing pattern layered onto the alternating knee raises further challenges trunk stability, making this drill a simple, equipment-free way to build better awareness and control through the core.