Human Movement studies Flashcards
What is a fulcrum
prop; specifically: the support about which a lever turns
What is a Lever
A lever is a rigid rod that turns about a pivot
What 2 components make up tangential velocity
Angular velocity and radius of rotation
What is a 1st class lever
Fulcrum between the effort and resistance
What is a 2nd class lever
the load is between the effort (force) and the fulcrum. A common example is a wheelbarrow
What are the 3 guidelines for remediation
Correct form, communicate errors, formulate correction strategies
What is the difference between open and closed kinetic chains?
closed = fixed or stationary (running, squats).
Open = free, not fixed (kicking or throwing)
What are common throwing errors?
Segmental movement errors. Timing and sequencing errors. Errors due to lack of strength or power
Describe what a movement pattern is
A general series of anatomical movements that have common elements
Factors that influence the time and space variables of a movement pattern
Time, effort and flow
Describe throw like movements
Movements that are used to project an object that is allowed to lag behind the proximal segments that have finished their backswings and are now moving
forward.
What is the difference between a skill and a movement pattern
Skills have restraints eg. rules, and the size of the playing area. Movement pattern has no restraints, a series of movements with common elements
What is the difference between quantitativee and qualitative analysis
Quantative - Objective description using numerical terms. Qualative - Subjective description using non numerical terms
What components are the free body diagram made up of
Forces shown as straight arrows pointing in the direction they act on the body. Moments are shown as curves with an arrowhead or a vector with two arrowheads pointing in the direction they act on the body
Define critical features
Components of movement essential to the performance of a skill
What is the difference between a step and a stride
A step is defined as the moment from foot
contact of one foot to the contact of the
opposite foot and is representative of a half
cycle. A stride is a complete running cycle from foot
contact with the ground to the next ground
contact with the same foot
What is the difference between a relative angle and an absolute angle
RA = The angle between
longitudinal axes of two segments (e.g. knee
or elbow joint angle)
AA = The angle of
the inclination of a body segment (e.g.
thigh angle) describing the orientation
of a segment in space (relative to the
vertical or horizontal directions)
What happens to stance time and flight time as sprint velocity increases
What type of ground reaction force occurs during the late stance phase
Explain negative interactions
Where you improve one aspect but negatively impact the other. Eg. Improve step length but not frequency
3 factors that influence a projectile
Height, angle, velocity
4 stages of skill analysis
- Pre observation. 2. Observation. 3. Diagnosis. 4. Remediation
Pre observation
Movement analysis, identify key features
Observation
Observe desired response
