Weight Shift & Walks

  • Due Nov 3, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Nov 3, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following two video tutorials on weight shift during a walk cycle. After watching both videos, take the quiz

Weight Shift & Walks, Part 1

http://youtu.be/XALfDjfu-Cc

[PDF of Slides]

Summary for Part 1:

• Weight shift in a walk is noticeable in passive overlapping actions (motion of hair, cloth, etc.).
• Variation in weight also called “counteraction.”
•The effective weight change is significant; a variation of 50% of body weight is common.
• The effective total weight is greatest in the contact pose, from heel strike to toe off.
• The effective total weight is least in the passing position, as the body slows while rising and then speeds up while falling.
 

Weight Shift & Walks, Part 2

http://youtu.be/6U9xNTHFVEE

[PDF of Slides]

Summary for Part 2:

• Slow walks show very little weight variation as weight shifts from one foot to the other.
• Fast walks show significant weight variation due to both quicker timing and the greater up/down motion of the body.
• There is a backwards reaction force from heel strike of the contact pose to passing position.
• There is a forward reaction force from passing position to toe off of the contact pose.

 

Have a question? Go here. 

Optional: See more force plate data with various volunteers:

http://youtu.be/Xd8NdXC2QFg

Optional: Watch this video of various volunteers walking slowly on force plates:

http://youtu.be/exG5cRBh4eQ

Optional: Watch this video of various volunteers walking fast on force plates:

http://youtu.be/PTBsqluPLmw

 

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