AnswersLifetime Fitness semester EL2083Muscular Strength and Endurance

Muscular Strength and Endurance Answers

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Describe four ways in which improving your muscular fitness would have a positive affect on your life.

Answer:

Answers will vary but should relate to any four of the following: athletic performance, injury prevention, body composition, self-image, lifetime muscle and bone health, and chronic disease prevention.

3

A mother sprints across the yard to grab her small child before he enters the street. The mother is using her __________.

A
type I A slow-twitch muscle fibers that provided her with a fast burst of movement
B
type II B fast-twitch muscle fibers that respond quickly and provide her with speed and strength
C
type I B intermediate-twitch muscle fibers that respond quickly because they are delivered energy aerobically
D
type II A fast-twitch muscle fibers that act rapidly because they are delivered energy anaerobically
4

An individual picks up a cup and drinks from it. This is an example of __________.

A
a concentric contraction because muscles cause the elbow joint and arm to move
B
an eccentric contraction because the release of the muscle in the back of the arm causes the elbow to bend
C
an isometric contraction because the cup was stationary until the hand picked it up
D
a midcentric contraction because the movement took place around the core of the body
5

If you increased the amount of muscle mass in your body, what other changes would occur?

Answer:

More muscle mass would speed up metabolism, reduce the amount of body fat, and help protect an individual from injury.

6

Describe the components of health-related fitness.

Answer:

Cardiorespiratory fitness is the fitness level of the heart and lungs. Body composition is the ratio in the body of muscle to fat. Muscular strength is the force muscles can produce in a single maximum effort. Muscular endurance is the ability of muscles to remain contracted or to contract repeatedly over a period of time. Flexibility is the range of motion a body has.

7

Which statement BEST describes the factors that affect muscular endurance?

A
size of the muscle cells, ability to store fuel, and blood supply to the muscles
B
number of muscles, amount of exercise, and type of person
C
level of flexibility, amount of exercise, and ability to store fuel
D
blood supply to the muscle, type of exercise, and type of muscle cells
10

When comparing an individual with low muscular fitness to an individual with high muscular fitness, we would very likely find that __________.

A
the individual with low muscular fitness would also have less trouble sleeping
B
the individual with high muscular fitness would have a higher rate of illnesses
C
the individual with high muscular fitness would also have a lower chance of becoming injured
D
the individual with low muscular fitness would have better physical performance

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