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ISSA Personal Trainer 2019 > Biomechanics of Exercise > Flashcards

Biomechanics of Exercise Flashcards

1
Q

Define biomechanics.

A

The physical study of movement

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2
Q

What is stability?

A

The ability to maintain a balanced state

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3
Q

What is force?

A

The interaction that creates work, action, or physical change

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4
Q

What is magnitude?

A

How much force is applied to the dumbbells, barbells, or machine handles

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5
Q

What is direction?

A

The way in which the force is applied

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6
Q

What is the point of application?

A

Where the force is applied on the body or implement being used

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7
Q

What is the line of action (Line of force)?

A

An imaginary straight line drawn from the point of application of force through the direction of force

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8
Q

What is the angle of pull?

A

Angle at which a muscle pulls relative to the long axis of the bone on which it pulls

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9
Q

What is work?

A

Force x distance. Measured in foot-pounds and similar units

Example: lifting a 200-pound barbell 8 feet requires 1,600 foot-pounds of work

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10
Q

Define power.

A

The work done in a unit of time

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11
Q

What is Newton’s First Law?

A

An object at rest tends to stay at rest and an object in motion tends to stay in motion; unless acted upon by an outside force

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12
Q

What is inertia?

A

Tendency for an object to remain in its current state( in motion or at rest)

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13
Q

What are the two types of inertia?

A
  1. Resting inertia

2. Moving inertia

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14
Q

What is resting inertia?

A

An object at rest will stay at rest unless acted upon by an outside force

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15
Q

What is moving inertia?

A

An object in motion will stay in motion unless acted upon by an outside force

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16
Q

What is range of motion(ROM)?

A

The movement of a joint from full flexion to full extension

17
Q

What is Newton’s Second Law?

A

In order to create a force, you must place a mass into motion with acceleration and a change in velocity

18
Q

What is mass?

A

A body of coherent matter

19
Q

What is acceleration?

A

The rate of change of velocity per unit of time

20
Q

What is velocity?

A

The speed of something in a given direction

21
Q

What is momentum?

A

The quantity of motion of a moving body, measured as a product of its mass and velocity.

22
Q

What is the formula for finding Force?

A

Force = Mass x Acceleration

23
Q

Gravity exhibits an acceleration of approximately ____ grey per second squared.

A

32.2

24
Q

What is Newton’s Third Law?

A

Objects in contact exert equal and opposite forces on each other

25
Q

What is a lever?

A

Rigid bar that turns about an axis of rotation or a fulcrum

26
Q

What is a fulcrum?

A

Point on which a lever rests or is supported and on which it pivots

27
Q

Describe a first-class lever?

A

Fulcrum in the middle, the effort is applied on one side of the fulcrum and the resistance on the other

28
Q

What is a second-class lever?

A

A lever in which the load lies between the fulcrum and the effort

29
Q

What is a third-class lever?

A

A lever in which the effort is placed between the fulcrum and the load

30
Q

What is torque?

A

The magnitude of twist around an axis of rotation (fulcrum)

31
Q

What is gravity?

A

The downward pulling force that creates resistance

32
Q

What is the center of gravity?

A

Point in the body around which your weight is equally distributed

33
Q

What is line of gravity?

A

Vertical line straight down from the center of gravity

34
Q

What is kinesthesis?

A

The ability to perceive your position and movement of the body or body limbs in space

35
Q

What is a visual reference point?

A

A chosen point of focus to aid in stability and balance

ISSA Personal Trainer 2019 (41 decks)

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