The group is comprised of the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. Its primary role is knee extension, which is essential for actions like standing up from a seated position, running, jumping, and climbing stairs.
Rehab Exercises For Quadriceps Focusing On The Rectus Femoris
The quadriceps femoris is the entire muscle group responsible for extending the knee, whereas the rectus femoris is just one of the four individual muscles that make up that group. Rectus Femoris: The Dual-Joint Muscle Positioned on the most anterior aspect of the thigh, the rectus femoris is the most superficial of the quadriceps muscles.
The rectus femoris, however, engages heavily during movements that require simultaneous hip flexion and knee extension, such as sprinting, kicking a ball, or performing a hanging leg raise. The vastus muscles, including the vastus lateralis (outer thigh), vastus medialis (inner thigh), and vastus intermedius (deep to the rectus), are highly active during the terminal phase of knee extension, such as when locking out the leg during a squat or stabilizing the knee upon landing from a jump.
Rehab Exercises For Quadriceps Focusing On The Rectus Femoris
Its defining feature is its dual-joint action; it inserts directly into the patellar tendon but originates on the anterior inferior iliac spine (AIIS) of the pelvis. Muscle Primary Action Secondary Action Common Training Exercises.
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