KIN 368_Chapter 9

What is Electromyographic (EMG) Amplitude?

• Measurement of the electrical activity of the muscle

• Assessed using EMG electrodes

• A and B

• Neither

The more collagen within a muscle, the stiffer the muscle, which allows for more exertion of force.

• True

• False

Older adults have stiffer muscle tendon units which leads to a more sensitive stretch reflex response.

• True

• False

How is passive stiffness calculated?

• 1. ΔT / ΔROM

• 1. F * R

• 1. Deg * Nm

• 1. M * A

Older adults have more noncontractile components in their muscles than younger adults.

• True

• False

Passive stretching causes large increases in muscle activity.

• True

• False

What is the biggest contributor to increased passive stiffness in older adults?

• echo intensity

• shoe size

• water intake

• diet

Echo intensity is the measure of muscle quality.

• True

• False

Who has higher passive stiffness?

• Young adults

• Older adults

• Kids

• All of them

Static stretching gives you information across the entire range of motion?

• True

• False