Tires â Retreading is less expensive than new tires and is a large portion of this cost. Although mere pennies per mile, an average tire can cost over $250 and annual tire expenses can exceed $4,000 ($0.03 per mile), enough to purchase 16 new tires annually, but still not enough to replace every tire of an 18-wheeler.
With the head in a forward position, a passive tensile force is created in the hyoid muscles resulting in hyoid muscle tension, causing the mandible to be depressed and translated posteriorly. The patient is therefore forced to contract the temporalis and masseter muscles to keep the mouth closed.
Lateral Flexion. Lateral flexion is the motion of bending your torso side to side. From a standing position, challenge your core muscles in the frontal plane. Hold a dumbbell in your right hand. Place your left hand behind your head and stand with your feet hip-width apart.