The down and under stretch stretches which muscle?

The down and under stretch stretches which muscle?

• A. Iliopsoas
• B. Rectus Femoris
• C. Vastus Lateralis
• D. Pectineus

Answer: (B)

The down and under stretch is positioned to lengthen tissues that cross both the hip and the knee. Rectus femoris is the only muscle that spans both joints among the common hip flexors and quadriceps, so it’s the one lengthened most in a stretch that extends the hip while the knee remains extended. This makes it the best target for this stretch. The iliopsoas is primarily a hip flexor, so this position doesn’t place it under the same targeted stretch. Vastus lateralis doesn’t cross the hip joint, so it isn’t the main focus here, and pectineus isn’t the primary muscle being targeted by this particular setup.

The down and under stretch is positioned to lengthen tissues that cross both the hip and the knee. Rectus femoris is the only muscle that spans both joints among the common hip flexors and quadriceps, so it’s the one lengthened most in a stretch that extends the hip while the knee remains extended. This makes it the best target for this stretch. The iliopsoas is primarily a hip flexor, so this position doesn’t place it under the same targeted stretch. Vastus lateralis doesn’t cross the hip joint, so it isn’t the main focus here, and pectineus isn’t the primary muscle being targeted by this particular setup.