6834 Lecture Notes - Lecture 3: Kinematics, Determinant, Greater Trochanter
21 Jun 2018
School
Department
Course
Professor
Lecture 3
Geometry of motion and kinematic gait
- What Is coordination?
oThe patterning of head, body and/or limb motions relative to the patterning of
environmental objects and events (regardless of skill level)
oMultiple joints and muscles that are activated at appropriated time and with correct
amount of force
oThe essence of coordination is sequencing, timing and grading the activation of
multiple muscle groups
oCoordinated movement involving more than one joint are associated with
movement trajectories that are straight and smooth
- Angle angle diagram
oAssess co-ordination
oIn phase – both joints extend or flex
oAnti-phase – one joint flexes one extends
o
Can plot two joints together to see how they interact
Inphase: both flexing or extensing at same time working together, from
bottom left to top right
In opposition, one is flexing one is extensing = anti-phase
- Movement type 1: Throw like movements – summation of speed
When we want a high amount of speed or velocity
Building on velocity at each segment that we are using
Whip like action with transfer of movement
As a joint peaks it moves on to the next and so on
find more resources at oneclass.com
find more resources at oneclass.com
o
o
oKicking counts because of run up, hip flexes, knee extends
All about order of joint engagement
oThrowing also counts
Early cocking
Rotation of hips to transfer to shoulders
Cocking
Blocking force from stride transfers velocity up chain
Acceleration – generate velocity
Follow-through – decelerate
oTennis serve also counts
find more resources at oneclass.com
find more resources at oneclass.com
Hip-shoulder-elbow-wrist-racket
Build up of speed summation
If need a high degree of accuracy; can find that segments can be reversed
oJavelin
Trunk peaked first, then upper arm then lower arm
- Movement type 2 – push like movements
Simultaneously extend all of our joints
Produce large amount of force
Highly accurate
oNetball shooting
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Angle angle diagram: assess co-ordination, in phase both joints extend or flex, anti-phase one joint flexes one extends o. Can plot two joints together to see how they interact. Inphase: both flexing or extensing at same time working together, from bottom left to top right. In opposition, one is flexing one is extensing = anti-phase. Movement type 1: throw like movements summation of speed. When we want a high amount of speed or velocity. Building on velocity at each segment that we are using. Whip like action with transfer of movement. As a joint peaks it moves on to the next and so on o o: kicking counts because of run up, hip flexes, knee extends. All about order of joint engagement: throwing also counts. Blocking force from stride transfers velocity up chain. Follow-through decelerate: tennis serve also counts. If need a high degree of accuracy; can find that segments can be reversed: javelin.
