Chapter Notes: Health Related Physical Fitness

Table of Contents
1. LEARNING OBJECTIVES
2. Meaning and Concept of Health Related Physical Fitness
3. Endurance
4. Flexibility
5. Body Composition
6. Cardiovascular Endurance
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LEARNING OBJECTIVES

• Meaning and Concept of Health Related Physical Fitness
• Components of Health Related Physical Fitness
• Muscular Strength
• Endurance
• Flexibility
• Body Composition
• Cardiovascular Endurance

Meaning and Concept of Health Related Physical Fitness

Health related physical fitness directly influences the health and well-being of an individual. It is not only important for sportspersons but also for every individual in daily life. Fitness sessions should be included in the daily routine to remain healthy and active.

Physical fitness is a state of health and well-being which develops the capacity to perform better in sports, job, and day-to-day activities. It is achieved through moderate to vigorous physical activities, balanced diet, and proper recovery or rest.

Regular planned fitness activities such as walking, jogging, cycling, swimming, and yoga improve overall health and reduce the risk of diseases like heart disease, diabetes, hypertension, and depression. Therefore, physical fitness is closely related to the wholesome development and well-being of an individual.

Components of Health Related Physical Fitness

There are five components of health related physical fitness:

1. Muscular Strength

2. Endurance

3. Flexibility

4. Body Composition

5. Cardiovascular Endurance

Muscular Strength

Muscular strength is directly related to force production. Every movement of our body, whether flexing a finger or getting up from bed, requires strength. It is essential not only in sports but also in daily life activities. A newborn baby cannot stand or walk due to lack of strength, and paralysed people cannot move their body parts because they lose the ability to produce force.

Muscular strength is defined as the ability of the muscle or group of muscles to exert force against resistance to overcome or act against it according to the demand of the activity. Resistance may be internal (own body weight) or external (opponent's body weight or equipment).

Types of Strength

1. Maximum Strength - Ability to generate force with 100% effort in a single contraction. Useful in weightlifting and throwing events.

2. Explosive Strength - Combination of strength and speed; muscles contract with 70-80% effort in short time. Required in sprinting, jumping, and boxing.

3. Strength Endurance - Ability to apply force for a longer duration with 50-60% effort despite fatigue. Seen in cycling, swimming, and hill running.

Factors Affecting Muscular Strength

• Neural control

• Muscle cross-section (size of muscle)

• Muscle fibre type (fast twitch and slow twitch)

• Energy supply (ATP and CP)

• Psychological factors such as anger, aggression, and motivation 

Methods of Improving Strength

1. Using Own Body Weight - Rope climbing, hill running, push-ups.

2. Using External Weight - Weight training, medicine balls, belts, swimming against water flow, drag running.

Endurance

Endurance is the ability of an individual to continue physical activity for a longer duration without getting fatigued. It involves both physiological and psychological abilities. Even after feeling tired, if a person continues working efficiently, it indicates good endurance.

Endurance is task specific. For example, a teacher can stand for hours but may not run long distances, whereas a marathon runner can run for hours but may not sit long in an office.

Types of Endurance

1. Basic Endurance - Ability to perform any work for long duration at slow pace; depends on aerobic capacity.

2. General Endurance - Ability to perform work for long duration with varying pace and movements.

3. Specific Endurance - Ability to perform a specific activity for long duration with set movements and pace.

Factors Determining Endurance

• Muscle fibre type

• Aerobic capacity

• Anaerobic capacity

• Movement pattern and technique

• Psychological factors such as mental toughness

Methods of Improving Endurance

1. Continuous Method - Long duration activity without rest

   • Slow Pace

   • Fast Pace

   • Changing Pace

   • Fartlek (Speed Play)

2. Interval Method - Sub-maximum intensity with incomplete recovery.

3. Repetition Method - Near or more than competition pace with complete recovery.

4. Competition Method - Participating in real competitions to improve specific endurance and tactics.

Flexibility

Flexibility is the ability to move body parts through the maximum range of motion around a joint. It is measured in degrees, radians, or centimetres. It is essential for sports performance and normal healthy living.  

Types of Flexibility

1. Passive Flexibility - Movement with external help.

2. Active Flexibility - Movement without external help.

   • Static Flexibility - Movement in standing or sitting position.

   • Dynamic Flexibility - Movement while moving.

Factors Determining Flexibility

• Anatomical structure of joints

• Ligaments and muscle stretchability

• Coordination between muscles

• Strength of muscles

Methods of Improving Flexibility

1. Ballistic Method - Rhythmic swinging movements.

2. Stretch and Hold Method - Stretch to maximum and hold for few seconds.

3. Post-Isometric Stretch (PNF) - Muscle contraction followed by gradual stretch; requires trained supervision.

Body Composition

Body composition is the classification of the human body into fat weight and lean body weight. It can be assessed by:

• Direct Method - Hydrostatic or underwater weighing.

• Indirect Method - Skin-fold caliper measurement.

Cardiovascular Endurance

Cardiovascular endurance is the ability of the heart, lungs, and blood vessels to supply sufficient oxygen and nutrients to the working muscles for a prolonged period. It involves moderate contractions of large muscle groups for long duration.

The 12-minute run/walk test is commonly used to evaluate cardiovascular endurance.