HLP CHAPTER 4

Which essential hormone do men have in higher amounts than women, allowing men to build more muscle mass than women?

Testosterone

Which advantage is associated with static exercises?

They require no equipment.

The isometric side bridge exercise develops the obliques.

True

What percentage of all Americans will be afflicted with low back pain at some point in their life?

85%

What is the recommended amount of resistance and number of repetitions for improving muscular endurance?

40-60% RM; 15 to 20 repetitions

What do stability ball exercises improve?

"core" endurance and strength

At what age do people typically begin to lose muscle mass?

30

Exercises involving small muscles should be done before exercises using large muscle groups.

False

For a strength-training program to develop general fitness, it is best to choose resistance of about 90% of 1 RM.

False

Myofibrils are made up of groups of muscle fibers.

False

Training with free weights is a form of variable resistance exercise.

False

Which is true when comparing free weights and weight machines?

Free weights adapt to real life motion.

What is the best way to build individual muscle strength and muscle size?

Use heavy resistance with few repetitions for multiple sets.

Which is a definition of hypertrophy?

an increase in muscle fiber size

Which describes a muscle fiber?

an individual muscle cell

What is the best description of isokinetic exercise?

applying force at a constant speed

How is muscular strength assessed?

by measuring the most force a muscle can produce in one effort

What makes up a motor unit?

one motor nerve connected to muscle fibers

What characterizes fast twitch muscle fibers?

rapid contraction

Which activities predominantly use slow-twitch muscle fibers?

walking and jogging