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28. Physical fitness can be broken down into four health-related parts – cardiorespiratory endurance, muscular strength and endurance, flexibility, and body composition. The following relates to muscular endurance:

a. The ability of your heart, blood vessels, and lungs to distribute nutrients and oxygen and to remove wastes.
b. The ability of muscles to keep working for an extended period of time.
c. The ability to use a muscle throughout its entire range of motion.
d. Is the amount of body fat compared to lean tissue, such as muscle and bone.

2 Answers

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Final answer:

Muscular endurance is the ability of muscles to work for prolonged periods, and can be improved through aerobic exercises like cycling and walking. Strength can be increased by anaerobic exercises such as weight lifting. Flexibility is enhanced by stretching exercises, thereby reducing injury risks.

Step-by-step explanation:

Muscular Endurance and Types of Exercise

The question relates to the health-related component of physical fitness known as muscular endurance. This is the ability of muscles to keep working for an extended period of time. Exercise improves both muscular strength and muscular endurance, where muscular strength is the force a muscle can exert during a contraction, and muscular endurance is the stamina of the muscles to continue contracting over time without fatigue.

Aerobic exercises such as cycling, walking, and running are particularly effective at increasing muscular endurance and cardiovascular health. These exercises involve sustained, repetitive movements and primarily use slow-twitch muscle fibers that generate energy through aerobic metabolism. Regular aerobic exercise enhances the efficiency of oxygen usage in muscles and improves overall endurance.

Anaerobic exercises, like weight training or sprinting, focus on increasing muscle strength through brief and high-intensity activity. Unlike aerobic exercises, anaerobic activities utilize fast-twitch muscle fibers that are more suited for short bursts of power. Additionally, flexibility exercises, such as stretching, enhance the muscles' and joints' range of motion, guarding against activity-related injuries by improving flexibility.

Differences in individual responses to aerobic exercise can be attributed to genetic variations in muscle fiber types, with some individuals possessing more slow-twitch fibers which contributes to greater endurance. Nonetheless, increased physical activity is beneficial for everyone, leading to enhancements in cardiovascular and muscular fitness, bone density, cognition, and weight control.

User Predominant
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in my opinion i believe that the correct answer to this question would be B.
B. The ability of muscles to keep working for an extended period of time.
User Onuray Sahin
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