Due to the
interdisciplinary nature of Biomechanics and Kinesiology, many professions
use qualitative and quantitative analysis. Basic knowledge of biomechanics
and kinesiology are essential for competent professional analysts of human
movement, including (but not limited to) physical education teachers,
physical therapists, physicians, coaches, personal trainers, and exercise
instructors. A structured approach helps to facilitate the
identification, analysis, and solution of problems or questions related
to human movement. Being capable of accurately identifying the anatomical
components of human movement including bones, joints, muscles, and related
portions of the nervous system is crucial. Appropriately communicating
the movements of the body and body segments aids in the ability to achieve
one's goals.
The objectives of this assignment are:
- to apply and demonstrate
the knowledge, skills, and abilities learned throughout this course
to:
- describe performances
- evaluate performance
- improve performances
- solve problems
- prevent and evaluate
injuries
Getting Started
- Select a movement or
skill that you and the members of your group would like to analyze.
No more than four members per group. Graduate and directed
study students are to perform this project independently. Approve
the movement or skill with the instructor prior to beginning the analysis!
The following form is to be completed by the group and signed by
each member and turned in by Friday, February 3rd:
Movement
Analysis Project Selection Form
- Obtain ample background
research of what the "experts" say regarding the movement or skill
chosen. Be wary of Jon Doe's personal Internet resources.
The best choices come from refereed journals such as Medicine
and Science in Sport and Exercise (MSSE), the Journal of Strength and
Conditioning Research (JSCR), Sport Biomechanics, Journal of Athletic
Training, Canadian Journal of Sport Sciences, Ergonomics, International
Journal of Sport Biomechanics, Journal of Sport Sciences, Physical
Therapy, Journal of Bone and Joint Surgery, Research Quarterly for
Exercise and Sport, Journal of Biomechanics, etc... A "refereed"
journal is one that has a system of "peer review" by other scientists
and professionals before something gets published. Many coaching
and/or popular journals such as Muscle and Fitness, Track Technique,
Swimming Technique, Golf Digest, International Gymnast, Sports Illustrated,
Scholastic Coach, and Runner's World are not refereed
and hence you need to be very cautious about the information published
in them. A minimum of five professional refereed references are
required. There are also excellent textbooks out there that you should
obtain from the library or interlibrary
loan if needed.
The
following form is to assure that you are not procrastinating on working towards
your final project. A list of references obtained is due by Friday,
March 3rd. See document for details.
- Determine the critical
aspects of the movement and identify the best method for observing and
collecting information. As a minimal requirement you will need
to obtain several still digital photos of the image, as well as digital
video of the movement. I would suggest from several angles. A
correctly completed stick figure center of gravity (COG) document needs
to be implemented in the presentation and paper. The following
diagram may assist in your decision making process:
- Break the skill or movement
into distinct phases to assist in your explanation and discussion.
Some movements or skills have common phases (i.e. preparation,
action, follow through), others you may have to make up yourself.
- Conduct your anatomical
and mechanical analysis (see outline below) and determine the
best way to incorporate into your paper and presentation to class.
Information regarding bones, joints, movements, planes, axes,
movement type, kinesthetic awareness, etc... should be included.
- Identify, evaluate,
and provide information regarding correction of any faults observed.
- Prepare a professional
presentation to be given to your peers (every member of group must
contribute), as well as one paper (hard copy and CD-ROM) per group to
be turned in on a CD-ROM that contains all information (Power Point,
handouts, overheads, videos, paper, etc...) provided during presentation
and the final overall paper (with title page, review of literature,
tables and graphs, APA references throughout, conclusion, Reference
page, etc...) burned to the CD-ROM. I also request that the entire
completed project be saved to you hand in folder in the G drive for this
Biomechanics course. Do not forget to place all videos, digital stills,
and sounds if applicable in the same folder and on the same CD.
The following outline gives some basic components that are necessary
for analysis of a motor skill to get you started:
- Description of the motor
skill performance
- Primary purpose of skill
- Movement phases
- Classification of the skill
- Classification of movement patterns and skills provides
further clues as to the nature of both the anatomical and mechanical requirements
of a particular group of skills. The following System for Classification
of Motor Skills takes into account the objective of the skill, the
medium in which the skill occurs, and the nature of motion, which may also
assist in your analysis:
- Maintaining posture
- Movement for exercise and fitness
- Giving motion:
- To external objects
- Pushing and pulling
- Lifting and carrying
- punching
- etc..
- Throwing, striking, and kicking
- To one's own body
- Supported by the ground or other resistant surface
- Locomotion on foot
- Locomotion on wheels, blades, and runners
- Rotary locomotion
- Suspended and free of support
- Swinging activities on trapeze, flying rings, or
similar equipment
- Hand traveling on traveling rings or horizontal
ladder
- Unsupported - i.e., projected into or falling through
the air
- Weightlessness
- Supported by water
- Swimming
- Aquatic stunts
- Boating
- Receiving impact:
- From one's own body in landing from a jump or fall
- From external objects in catching, trapping, spotting,
or intercepting
- Linear
vs. Angular nature of the motion(s)
- Anatomical
analysis
- Joint
actions and segment motions
- Muscle
participation and form of contraction (concentric, eccentric, isometric)
- Neuromuscular
considerations (mechanoreceptors, stretch shortening cycle)
- Anatomical
principles related to effective and safe performance
- Avoidance of injury
- Mechanical analysis
- Underlying
mechanics objective(s):
- The underlying objective of motion may be:
- Balance
- To regain stability
- To attain mobility
- Locomotion
- Travel from point to point
- Travel a prescribed distance
- Travel a prescribed pattern
- Projection
- For maximum height
- For maximum range
- For maximum accuracy
- Manipulation
- Of objects
- To reproduce a pattern
- Of a resistance
- Maximum effort
- Maximum speed
- Maximum power
- Maximum force
- Nature of forces
causing or impeding motion
- Must understand
if the motion is angular, linear, or general motion first.
- Pushing and pulling
forces, weight and resistance, twisting and turning forces must be identified
and their effects noted.
- Examples
include:
- Muscle force
applied through specific joints producing movement
- External
weight or body mass offer resistance forces (acceleration of gravity?)
- Impact with
the ground at the end of a jump will produce a force stopping motion.
- Lack of strength,
limited ROM, etc...
- Mechanical principles that apply
- The identification
of the mechanical principles related to the execution of the skill is a
first step in establishing the causes of error in the performance of the
skill. Focusing on these principles and how they relate to the skill
suggests the potential sources of error. Each movement phase must
be considered in turn for quality.
- Considerations
of:
- Speed of movement
- Forces involved
with movement
- Balance
- Direction
- Timing
- Water pressure
- Air pressure
- If projecting
an object is involved:
- Extension at
release (or contact)
- Path of object
- Spin
- Angle of release
(or impact)
- Violation of principles
- Which application(s)
of mechanical principles is (are) violated?
- What are the
errors?
- What are the
sources of errors?
- Prescriptions for improvement
of performance indicate how the performances should be changed so that
the principles are no longer violated.