Dynamics of Sporting Movements Flashcards
Formula for linear momentum
Linear momentum (p) = Mass (m) x Velocity (v)
What is the Stretch Shortening Cycle
Active Stretching of a muscle followed by an immediate shortening of the same muscle
Stretching the muscle during the eccentric phase to cause a more forceful concentric contraction
Has to occur quickly for it to occur properly and effectively
Hip Shoulder loading causes prestretching of?
Anterior Shoulder Muscles
Trunk Musculature
Shoulder Arm loading phase is a contraction of which muscle group
Concentric contraction of trunk rotators
When does maximum Shoulder arm loading occur
Occurs at maximum humero-throacic external rotation
When is arm cocking phase completed?
At Maximum Humeral External rotation
What is the kinetic link principle?
Advocates Proximal to Distal Sequencing
Describes how the human body can be considered in terms of a series of interrelated links or segments. Movement of one segment affects segments both proximal and distal to the first segment.
What is the Force-Velocity Relationship?
Muscle concentric contraction is stronger and more powerful proceding a period of eccentric contraction through activation of the Stretch shortening cycle
Increased ROM with higher force
Hip Shoulder Loading
Hip Shoulder separation increases
Hips lead the shoulders because of proximal to distal sequencing
Shoulder arm Loading
Shoulder segment accelerates
Hip shoulder separation angle reduces
Shoulder arm prestretching begins
Arm Acceleration Phase
Prestretch causes maximum concentric contraction of connected segment –> driving large velocity contribution
Optimising transfer of angular momentum
Summate segmental velocities
How do MEMS accelerometers work?
Detect changes in the location of the seismic mass in relation to the capacitors
What are Gyroscopes
Use the Coriolis effect to detect the angular velocity or rate at which a body is turning - DONT PROVIDE CURRENT ANGLE JUST THE SPEED
