Notes, summaries, assignments, exams, and problems for Physical Education

Intrinsic Regulation of Contraction

a) Relationship between length and tension

Muscle fiber (Frank-Starling Law) ownership of the heart to contract in proportion to its completeness (a more complete, higher volume of projection) to a level where more volume increases are not accompanied by spending.

Frank-Starling law: The higher the fill of the heart during diastole, the greater the force of contraction during systole. Therefore, tension increases as diastolic volume increases until it reaches a maximum, then it tends to decrease.

Speed Conduction in the Heart Muscle

Atrial and ventricular muscle fibers:

• 0.3 to 0.5 m/sec.
• 1/250 speed of large nerve fibers.
• 1/10 speed of skeletal muscle fibers.

Purkinje system: 4 m/sec.

The action potential can traverse... Continue reading "Cardiac Physiology: Contraction, Conduction, and Cycle" »

The Significance of the False Beard

The "beard," often resembling a long, small beard, was worn on the chin and secured behind the ears. Craftsmen and merchants also belonged to this group, with many employed in domestic service. Egyptians were renowned as skilled artisans.

The Role of Priests

In service to religion, priests held significant power, accumulating substantial wealth within their temples. They also owned a large portion of the country's land.

The Mummification Process

Bodies underwent an extensive process where their intestines were extracted and placed in vessels known as "canopic jars." The bodies were then coated in various substances and meticulously wrapped in bandages to preserve their lifelike appearance.

Embalming the Body

Initially,... Continue reading "Ancient Egyptian Mummification: Rituals and Process" »

Item 3: Resistance

Resistance is the ability that allows us to maintain physical effort for a prolonged duration and recover more quickly afterward.

In the Muscular System:

• Type of muscle fiber
• Energy deposits to obtain ATP
• Ability to remove lactic acid that accumulates after anaerobic work, preventing fatigue

In the Nervous System:

• Coordination of different muscles to execute movement

In the Circulatory System:

• Quantity of blood flow
• Capacity of the body to transport oxygen and energetic substances

In the Respiratory System:

• Ability to deliver oxygen to the body
• Oxygen exchange in the alveoli of the lungs and muscle cells

Classification:

Based on energy pathways that provide energy to the muscles, and characteristics of volume and intensity.

Anaerobic Endurance

Anaerobic

Analysis and prevention of damage caused by work.

Prevent workers from suffering any injury while on the job. This requires participation from all stakeholders: workers, technicians, and employers. Prevention organizations (e.g., mutual insurance companies, INSHT) and relevant legislation (local, regional, national, European) also play a crucial role.

Understanding Workplace Damage

Direct Damage: Workplace Accidents

Legal Definition of Workplace Accident

Any injury workers suffer in connection with or as a consequence of the work performed for others. Also considered accidents:

• In itinere (on the way to/from work)
• While performing trade union duties
• During professional performance in rescue acts
• When suffering an occupational disease not officially

Advantages and Disadvantages of Using Floats

Advantages include quickly gaining confidence and learning quickly. However, a drawback is that overuse can hinder the adjustment process when removing the floaters.

Types of Floating Positions and Techniques

Variables Related to Swimming Propulsion

Basic Propulsion Variables

Considerations for Jumps and

Changes in the Musculoskeletal System During Aging

During aging, there is a loss of bone mass, decreased muscle strength, osteoarticular changes, an increase in reaction time, and decreased speed of movement.

Gait Alterations

One of the consequences of changes that occur in the musculoskeletal system is an alteration in the structure of harmonious gait and balance.

Characteristics of Movement

• Slow movements.
• Slowing of trunk rotation.
• Reduced arm swing.
• Absence of heel lift.
• Minimal toe lift.
• Reduced single-leg stance.

Care for Nurses

• Re-educate balance.
• Encourage the use of assistive devices.
• Reduce environmental barriers.
• Recommend exercises to delay deterioration.

Osteoarticular Problems

Older adults may experience various joint diseases. The risk of disability... Continue reading "Musculoskeletal Changes, Falls, and Rehabilitation in Aging" »

Muscle tension results from the contraction of muscle fibers. In the muscular system:

• Muscle fiber types: fast or slow, length, and thickness.
• Volume of fibers (muscle hypertrophy).
• Types of muscle contraction: concentric, isometric, and isotonic.

In the nervous system:

• Coordination of different muscles for movement: agonists, antagonists, and fixers.

Other factors:

• Muscle temperature, which can increase with a good warm-up.
• Training, form, or motivation.

Sorting: Force = Mass x Acceleration

Maximum Force:

The capacity to create maximum tension during muscle contraction. It is related to muscle mass or load.

Maximum Acceleration:

Minimal or no load, for example, when a weightlifter lifts weights in competition.

Explosive Strength:

The ability to overcome... Continue reading "Understanding Muscle Strength, Speed, and Flexibility" »

Passing and Cutting

Date: 25/11/08

Objectives:

1. To gain an advantage towards the basket by a player without the ball.
2. To pass the ball to a teammate who gains an advantage.

Requirements:

1. The player with the ball facing the basket.
2. Change of direction and/or speed of the player without the ball (the player who just received the pass).
3. Awareness of different gameplay options.

Features:

1. Context analysis: distance to the basket, free space, and run of the player without the ball.
2. The characteristics of the players involved in the action (tall, short).
3. Context of the game (e.g., 24-second clock at the end of a period).

Blocking (Offense)

Date: 04/12/08

Objectives:

1. Retrieving the ball after a missed shot.
2. Facilitating an advantage for oneself or a teammate.
3. Hindering

Developing Children's Dressing Skills

Understanding Clothing Habits Development

Children's habits related to clothing can be distinguished into three main areas:

• Dressing and Undressing: Fostering autonomy in self-care.
• General Appearance: Emphasizing cleanliness and appropriate clothing choices.
• Clothing Care: Promoting cleanliness, order, and maintenance.

Initially, the adult is responsible for these tasks. As a child grows, they begin to participate actively in these processes.

Key Considerations for Skill Development

Developing clothing habits is an activity that significantly encourages affective development, as it promotes communication and interaction. To foster a child's interest and motivation, consider the following strategies:

• Clear Explanations:

Flexibility Work Recommendations

To improve flexibility, it's essential to work on specific muscle groups and joints.

Effects of Flexibility on the Nervous System

Flexibility improves the quality and speed of stimuli, through which nerves reach the muscles to act.

Understanding Breathing

Breathing is the process by which gas exchange occurs, facilitating the oxygen necessary for sustaining life and the output of carbon dioxide. It also plays a crucial role in maintaining the body's pH balance.

Controlling Breathing

Breathing can be controlled both physically and mentally. It is the only vital function that escapes the split between voluntary and involuntary control.

Phases of Respiration

• Expiration: Of great importance, since expelling the stale air