Methods Exam

The MET threshold for sedentary behavior

1.5 METs or less

Rectilinear

straight-line movement.

Kinematics

How something moves

Kinetics

Why/how forces produce movement

What is HIIT?

short periods of high-intensity work with recovery periods

Moment of inertia

Resistance of a body to changes in angular motion

Impulse =

Force × Time

Progression of Muscle Training

Endurance → Hypertrophy → Strength → Power

Eccentric contraction

Muscle lengthens while producing force.

Concentric contraction

Muscle shortens while producing force

PEC

Stores elastic energy in tissues such as fascia

SEC

Stores elastic energy primarily in tendons

CC

Generates muscular tension and force

Three SSC Phases

Eccentric = Decelerate → Amortization = Transition → Concentric = Release.

What is the primary characteristic of plyometric training?

Fast eccentric movements followed immediately by powerful concentric movements

What does speed training primarily improve?

Velocity in a specific task or modality.

Which model explains elastic energy storage and release

Hypertrophy Model

What generally happens when the amortization phase is too long

A longer transition can reduce the effectiveness of the SSC.

Curvilinear

movement along a curved path.

Increasing force

increases torque

Work

the product of force and the distance through which an object moves

Power

the RATE at which work is performed

Strength

the amount of force a person can produce during a task.

Energy

the ability or capacity to perform mechanical work

5 things that reduce efficiency

1. 1.Muscular coactivation – Antagonist muscles work against agonist muscles.

2. 2.Jerky movements – Repeated changes in direction require energy to accelerate and decelerate.

3. 3. Extraneous movements – Unnecessary movements, such as excessive arm movement while running.

4. 4. Isometric actions – No displacement, so no mechanical work is produced.

5. 5. Excessive center of gravity excursions – Unnecessary raising and lowering of the body's center of gravity.

Skeletal muscle makes up approximately

40–45% of body weight

Four Characteristics of Muscle Tissue

1. Excitability: Ability to respond to a stimulus.

2. Contractility: Ability to generate pulling force/tension.

3. Extensibility: Ability to lengthen or stretch.

4. Elasticity: Ability to return to original length and shape after the force is removed.

Sympathetic nervous system

Increases HR

"Fight or flight"

More active during exercise

Increases stimulation of the heart

Parasympathetic nervous system

Decreases HR

"Rest and digest"

More active at rest

Slows stimulation of the heart