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Biomechanics of Strength and Power > Section A - Mechanical Factors Affecting S And P > Flashcards

Section A - Mechanical Factors Affecting S And P Flashcards

1
Q

Mechanical factors affecting strength and power generation

A 
Joint angle
Joint velocity
Muscle action 
Moment arm (mechanical advantage and disadvantage)
Length and velocity of isolated muscle
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2
Q

Neural factors affecting strength and power generation

A 
Num and size of motor units activated
Frequency of stimulation
Muscular co-ordination 
Co-contractions 
Synchronisation of motor unit firing
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3
Q

Architectural/ structural factors affecting strength and power generation

A 
Pennation angle
Fibre length
Fibre arrangement (in series vs in parallel)
Motor unit types (fibre distribution)
Innervation ratio 
Cross sectional ratio (PSCA & ASCA)
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4
Q

Variables measured to quantify mechanical responses

A

Kinetic and kinematic

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5
Q

Vertical plane passing from posterior to anterior? Movement around which axis?

A

Saggittal plane

Frontal

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6
Q

Vertical plane passes from right to left? Movement around which axis?

A

Frontal plane

Saggital axis

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7
Q

Plane that divides the body into superior and inferior halves? Movement around which axis?

A

Horizontal plane

Vertical axis

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8
Q

The point through which the mass of the body can be considered to act

A

Centre of mass

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9
Q

Variables that describe an objects motion? Examples?

A

Kinematic

Displacement and velocity

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10
Q

Variables which cause an object to change its state of motion? Examples?

A

Kinetic variables

Force and power

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11
Q

What had magnitude and direction?

A

Vectors

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12
Q

The rate of change in distance is?

A

Speed

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13
Q

What is the formula for speed and what is it measured in?

A

Speed= distance / time taken
Metres per second m/s
Symbol is s

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14
Q

What is the rate of change of displacement?

A

Velocity

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15
Q

What is the equation for velocity and what is it measured in?

A

Velocity= displacement / time taken

Metres per second

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16
Q

What is the rate of change of velocity?

A

Acceleration

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17
Q

What is the equation for acceleration and what is it measured in?

A

Acceleration= change in velocity/ time taken

Metres per second per second (m/s2)

18
Q

What causes or tends to cause acceleration

A

Force

19
Q

What is the magnitude of force multiplied by the velocity of motion? Unit of measurement?

A

Power

Watts

20
Q

What is the magnitude of a force multiplied by the mass of an object? Unit of measurement?

A

Momentum

Kg.m/s

21
Q

What is the force applied over a particular distance? Unit of measurement?

A

Work

Joules or newton metres

22
Q

What acts whenever one body moves against the surface of another body

A

Friction

23
Q

The product of force and the time over which force acts? Unit of measurement?

A

Impulse

Ns

24
Q

The reluctance of a body to change its state of being

A

Inertia

Mass is a measure of inertia

25
Q

An objects mass multiplied by gravity? Unit of measurement?

A

Weight

Newton’s (N)

26
Q

Motion that states that a body will continue in its state of motion unless acted on?

A

Newton’s first law

27
Q

A motion states that the rate of change of momentum is proportional to the force causing it and in that direction?

A

Newton’s second law

28
Q

For every action there is an equal and opposite reaction?

A

Newton’s third law

29
Q

The capacity to do work?

Unit of measurement?

A

Energy

Joules

30
Q

The magnitude of the force multiplied by the perpendicular distance between the line of action and the axis?

A

Torque

Of movement or force

31
Q

What has the pivot in between the load and the effort?

A

A first class lever

32
Q

What has the load between the pivot and the resistance?

A

A second class lever

33
Q

What has the effort between the pivot and the load?

A

A third class lever

34
Q

What is the angle an object moves through between a starting and finishing point. Unit of measurement?

A

Angular displacement

Degrees or radians

35
Q

The rate of change in angular displacement? Symbol?

A

Angular velocity

W

36
Q

The rate of change of angular velocity? Symbol?

A

Angular acceleration

Weird a

37
Q

The position of body mass relative to the rotating axis, and is a measure of the resistance of the body to angular acceleration?

A

Moment of inertia

Lower the moment of inertia, the quicker the body will spin about the axis

38
Q

Vertical and passes from right to left? Movement around which axis?

A

Frontal plane

Sagittal

39
Q

Divides the body into superior and inferior halves? Movement around which axis?

A

Horizontal plane

Vertical axis

40
Q

The point through which the mass of the body can be considered to act

A

Centre of mass

41
Q

What describes an objects motion? Give examples

A

Kinematic - describes an objects motion

•displacement, velocity, acceleration

42
Q

Variables that cause object to change its state of motion? Examples?

A

Kinetic - variables that cause object to change its state of motion
•force, torque, power, work, impulse

Biomechanics of Strength and Power (5 decks)

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