CF - Muscular Fitness Lesson

Muscular Fitness

Introduction

muscular skeleton 

Muscular Fitness

Muscular Fitness is made up of power (a skill-related component of fitness covered earlier), strength, and muscular endurance. All three components of muscular fitness are important to health and good performance.

 

Explore

Explore the information below to learn more about muscular fitness.

Strength

Strength is the amount of force that a muscle can exert. The amount of weight that a group of muscles can lift at one time is called a 1-repetition maximum and is considered a good indicator of force exerted 

 

Muscular Strength 

Muscular endurance is the ability to contract muscles many times without tiring or holding a muscle contraction for a long time without fatigue. 

 

Muscle Fitness Exercise 

Muscle contractions can be isotonic or isometric. 

Isotonic contractions pull on your bones to produce movement of your body parts, and isotonic exercises are those that use muscle contractions to move body parts. 

Isometric contractions occur when a muscle contracts and pulls with equal force in opposite directions so that no movement occurs. One example of an isometric contraction involves pushing your hands and arms together in front of your body. You push hard with each hand, applying force against the other, but neither hand moves. 

Plyometrics is a type of muscle fitness exercise that is used to build power. It involves doing explosive isotonic muscle contractions (like jumping). Isokinetic exercise is a type of isotonic exercise the velocity of movement is kept constant through the range of motion; these types of exercises require special machines. 

 

POWER self-assessment

Recall that power is the ability to use strength and produce force quickly. You will now complete a mini power self-assessment.

  1. Using tape or another material, make a line on the floor.
  2. Stand with your feet shoulder-width apart behind your line.
  3. Bend your knees and hold your arms straight in front of you at shoulder height.
  4. Swing your arms downward and backward, then vigorously jump forward as far as you can.

How far can you jump?

How much power can does your jump have?

 


 

Reflection

Muscular fitness is made up of three components: power, muscular endurance, and strength. Do your favorite activities require muscular fitness? Do you have enough muscular fitness?

What Is Your Takeaway? 

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