Problem Solving Approach to Biomechanics

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# Problem Solving Approach to Biomechanics - PowerPoint PPT Presentation

Problem Solving Approach to Biomechanics. Proper decision making  desired outcome. Problem Solving Approach to Biomechanics. Good problem solving involves an approach that is: Efficient Systematic Structured troubleshooting. Types of Analysis.

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Problem Solving Approach to Biomechanics

Proper decision making desired outcome

Problem Solving Approach to Biomechanics

Good problem solving involves an approach that is:

Efficient

Systematic

Structured

troubleshooting

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.”

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
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
Qualitative Application of Biomechanical Principle
• Whole body multi-joint movements
• Tennis serve
• Golf swing
• Softball swing of bat
• Whip-like effect
• Most central joint moves --> peripheral joint moves
• Hip/knees --> shoulders/elbow --> wrist
Qualitative Application of Biomechanical Principle
• Whip-like effect
• Most central joint moves --> peripheral joint moves
• Hip/knees --> shoulders --> elbow --> wrist
Qualitative Application of Biomechanical Principle
• Whip-like effect
• Most central joint moves --> peripheral joint moves
• EX. Softball swing
• Hips/upper body --> shoulders --> elbow --> wrist/forearm
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
Qualitative Application of Biomechanical Principle
• Whip-like effect
• Most central joint moves --> peripheral joint moves
• EX. Golf shot
• Hips --> shoulders --> wrist
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
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.
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)?
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

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