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Problem Solving Approach to Biomechanics

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  1. Problem Solving Approach to Biomechanics Proper decision making desired outcome

  2. Problem Solving Approach to Biomechanics Good problem solving involves an approach that is: Efficient Systematic Structured troubleshooting

  3. Types of Analysis • Qualitative – Involves a non-numerical description. • “Tiger Woods wants to move a boulder that is heavy.” • Quantitative – Involves the use of numbers. “The boulder Tiger Woods wants to move weighs 750 pounds.”

  4. Solving Qualitative Problems • Is the movement being performed with proper or adequate force? • Is the movement being performed through an appropriate range of motion? • Is the sequence (or pattern) of body movements appropriate (or optimal) for the execution of the skill? • Qualitative data may be collected based on: • Observation • Knowledge of skill technique

  5. Axis of Rotation • All movement occurs through rotation around joint(s), body segments (ex. lower arm) • Axis of rotation - imaginary line around which rotation occurs; perpendicular to plane in which movement occurs

  6. Qualitative Application of Biomechanical Principle • KINEMATIC LINK • Whole body multi-joint movements • Basketball free throw • Tennis serve • Golf swing • Softball swing of bat • Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Basketball shot • Hip/knees --> shoulders/elbow --> wrist

  7. Qualitative Application of Biomechanical Principle • KINEMATIC LINK • Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Basketball shot • Hip/knees --> shoulders --> elbow --> wrist

  8. Qualitative Application of Biomechanical Principle • KINEMATIC LINK • Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Softball swing • Hips/upper body --> shoulders --> elbow --> wrist/forearm

  9. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  10. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  11. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  12. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  13. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  14. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  15. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  16. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  17. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  18. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  19. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  20. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  21. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  22. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  23. Qualitative Application of Biomechanical Principle • KINEMATIC LINK - Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Soccer kick • Hips (flexion,rotation) --> knee (extension)

  24. Qualitative Application of Biomechanical Principle • KINEMATIC LINK • Whip-like effect • Most central joint moves --> peripheral joint moves • EX. Golf shot • Hips --> shoulders --> wrist

  25. Formal Problem Solving Method • Given a set of information or data EXAMPLE: An ACL requiring reconstruction • Establish a goal or desired result • EXAMPLE: Regain strength, stability, and range of motion • Implement a procedure or process to achieve the goal • EXAMPLE: Surgery followed by therapeutic rehabilitation

  26. Format for Quantitative Problem Solving • GIVEN:List the known data and conditions. • FIND:Formally state the goal of the solution. • DIAGRAM: draw a model representing movement, forces, etc. • FORMULAS:List the formulas to be used and any inferred or derived information. • SOLUTION:Actual steps in solving the problem. Solve for unknown variables. • ANSWER:Draw a box around the final answer.

  27. Illustration of Problem Solving Format • HEB is selling 15 oz boxes of Apple Cinnamon Toasted Oats cereal for $2.45. Cheerios Apple Cinnamon cereal in a 20 oz box is $3.90. If you have a coupon for $1.00 off of the Cheerios Apple Cinnamon brand, which is the better deal (price/oz)?

  28. GIVEN: • HEB Toasted Apple Cinnamon Cereal:price = $2.45 size = 15 oz • Cheerios Apple Cinnamon Cereal: • price = $3.90 size = 20 oz coupon value = $1.00 off • FIND: • Better deal (lower unit cost) • FORMULA: • unit cost = price / size • Derived Information: • Cheerios price = store price – coupon value

  29. SOLUTION: HEB unit cost = $2.45 / 15 oz = $0.163/oz Cheerios unit cost = ($3.90 - $1.00) / 20 oz = $0.145/oz Cheerios has the lower unit cost. Quantitative solution Qualitative answer