Opposite leg rises off the floor
Hip flexor tightness pulls the straight leg up; press it down gently or allow a slight bend.
Overactive muscles
Hip flexorsRectus femoris
Corrective work
Foam RollHip flexors↗StretchHalf-kneeling hip flexor stretch↗Hip flexor tightness pulls the straight leg up; press it down gently or allow a slight bend.
Rest the head flat; looking up at the knee creates cervical tension.