1. Pick up a pen or pencil and support it horizontally with one finger from each hand. Gently slide your fingers together until you can balance it on one finger. What is that point? How does shape of the object influence where this point is located on it?

2. Stand in a door frame facing one wall, with your torso touching the wall, and one foot on either side of the door frame. Rise up on your toes. Describe the result of this action. Why did this occur? (think about the topics of this lab, use appropriate biomechanical terms)

3. Stand about one inch away from a wall, feet together, with your back toward the wall. Have someone place an object directly in front of you. Without bending your knees or turning sideways, bend forward and pick up the object. Your feet must remain on the floor. Describe the result of this action. Why did this occur? (think about the topics of this lab, use appropriate biomechanical terms).

4. Sit in a chair. Place your hands behind your back and slowly stand up. *Note the motion of your trunk that is required to execute this task.* Next, sit in the chair holding a dumbbell (or something heavy) in your hands, extend your arms out in front of you at shoulder height. Stand up slowly. *Again, note the motion of your trunk that is required to execute this task.*? What changed between the two experiences regarding the motion required by the trunk to stand up? (think about the topics of this lab, use appropriate biomechanical terms).

Questions:

1. Balancing a pen on one nger. What is that point? How does shape of the object influence where that point is located on the object? 2. Describe the results of rising on to your toes in a door frame on your torse. Why does this occur? 3. Describe the result of the action of bending to pick up an object in front of you while standing in a door frame. Why does this occur? 4. What changes in the motion of the trunk when standing up from a chair and standing up from a chair while holding a dumbbell in your hands with elbows extended and shoulders exed