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

Coronary Insufficiency: Definition and Determinants

Coronary Insufficiency: It is the disproportion between the amount of blood needed for the myocardium and the amount received. Myocardial perfusion depends on two coronary arteries originating from the aorta. Factors that increase myocardial O2 consumption include: tension developed by myocardial contraction, tachycardia, and increased contractility.

Coronary status is indirectly assessed via the ECG, exercise ECG, and stress echocardiogram, and directly through thallium scintigraphy to visualize coronary lesions where anatomical evidence exists.

Mechanisms and Causes

Decrease in Coronary Blood Flow

This decrease is often caused by atherosclerosis of the coronary arteries, which can be promoted... Continue reading "Coronary Insufficiency: Mechanisms, Effects, and Manifestations" »

Developing Motor Skills

Rolling, Crawling, and Creeping:

• Spins about its longitudinal axis is one more automated motor pattern at 6 months.
• Creeping usually occurs around 5 months.
• From 6 to 8 months, infants are capable of creeping effectively.
• Crawling starts around 8 to 10 months.

Walking:

• The first steps are a constant search for equilibrium and stability.
• Standing upright at 12 months and starting to walk around 14/15 months; there is great variability in their first steps from 9 to 18 months, depending on development.

Running:

• The first actions similar to running appear as an uncontrolled gait around 18/20 months.
• By age 5, children can run with some ease.

Jumping:

• After an acceptable performance level in gait, around age 4, jumping becomes possible

Running Technique and Speed Development

Understanding the Running Stride

No two athletes run exactly the same way. However, we can distinguish athletes based on their running style. Running technique is based on biomechanical principles that enhance performance. Let's examine the key components of a stride:

• Stride: A full cycle from when the foot loses contact with the ground until it makes contact again. It consists of two steps.
• Stride Length: The distance between successive foot placements.
• Stride Frequency: The number of strides taken within a specific distance or time.

Phases of the Stride

1. Impulse: This phase results from the extension of the foot and knee, initiated when the hip drives forward. The opposite leg, the 'free' leg, folds up, creating

Developing Travel Speed Components

This quality depends on the balance of all components: frequency, amplitude, speed endurance, and technique, as well as an adequate speed of execution, which leads to good acceleration determined by contractile speed. Considering these components:

Stride Length

Improved through exercises that work driving ability, such as multihops without light burden or long jumps. Similarly, exercises to improve joint range using downhill slopes with wide steps, progressions extending the stride, and flexibility work are beneficial.

Frequency of Movements

Closely tied to stride length, a balance must be found. Develop this through segmental movements at maximum speed using multiple repetitions. This involves techniques like... Continue reading "Improving Athletic Speed: Components and Training Methods" »

Handball Fundamentals: Mastering Key Techniques

It is impossible to play handball without mastering the pass.

Passing Techniques

Types of Passes

• Front Pass: Executed by passing the ball from head height, with arms extended forward.
• Lateral Pass: The ball is passed from chest level, moving from the center outwards.
• Picado (Bounce) Pass: Thrown towards the ground so the ball bounces and reaches a teammate.
• Dejada (Drop) Pass: Involves placing the ball in the palm of the hand and passing it to a teammate.
• Suspension Pass: Executed while airborne, typically just before a jump shot.

Throwing (Lanzamiento) Techniques

There are several types of throws in handball:

Types of Throws

• Support Throw: This throw is executed with one or both feet on the ground.
• Suspension

Physical Activity and Training

Training is the set of practices aimed at regulating and improving performance over time.

Training Objectives

• Motivation
• Positive thinking

Sports Training

• Fitness training
• Technical and tactical training

Training Maintenance

Maintaining fitness or engaging in physical activity.

Fitness Training

Motor Skills

Allow individuals to perform movements with full efficiency.

Loading or Work

Training exercises are based on volume and intensity.

Recovery or Rest

There are two types: complete and incomplete, passive and active.

Fatigue

A state transition created in the body due to effort.

Performance

Act Selye

A stimulus in the body produces a stress reaction, generating a reaction that increases performance.

Schultz Law

Each person has an initial... Continue reading "Physical Activity, Training, and Fitness: A Comprehensive Overview" »

Standard Fish Portions and Cuts

1. Serving Sizes

• Standard Fish Portion: 200 to 300 grams.

2. Major Cuts and Preparations

• Major Parts (Slice): 200–250 grams. This cut typically includes meat, skin, and bones from the cylindrical body section.
• Tranche: A vertical slice cut across the fish, including skin and bone. Approximately 200–250 grams.
• Medallion: A large, thick, skinless, and boneless round cut. Serves 2 or 3 people (50–75 grams per unit).
• Supreme: The loin cut, boneless, served with or without skin. Approximately 150–180 grams.
• Darne (Steak): A thick cross-section cut, often from fish like salmon or bass. Obtained from fillets by boning the center, cutting the tail and the center section. Serves 2 to 4 people (150–180 grams).
• Fillets:

Components of Training

Load

Volume

Volume is the quantitative aspect of training. It involves the sum of all work done in one session. Volume values are usually low, medium, or high. Its main feature is its extension: measured in repetitions, distance, or time. Increasing volume is achieved by one or more of the following:

• Increase of distance, e.g., meters traveled.
• Increase in the number of repetitions performed.
• Increase in the number of exercises included in the program.

Intensity

Intensity is the qualitative aspect and refers to the amount of energy employed at a given moment. High-intensity loads require greater effort and, when applied correctly, allow the organism to reach near-maximum performance and ensure training adaptations. If we fail... Continue reading "Training Load, Volume & Intensity for Better Fitness Performance" »

1. Mature Bone Structure: Tissue Types

Bone is composed of two tissue types:

• Compact Bone: Strong, dense tissue with a structure similar to ivory.
• Trabecular Bone: A mesh-like bone tissue with intercommunicating spaces.

2. Classification of Bones

• Long Bones: Elongated and slightly wider.
• Short Bones: Small and solid.
• Flat Bones: Thin and of considerable surface area.
• Irregular Bones: Possess complex, irregular shapes.

3. Regions of the Vertebral Column

The column is divided into 5 regions:

• Cervical
• Dorsal (Thoracic)
• Lumbar
• Sacral
• Coccygeal

4. Types of Joints and Basic Characteristics

• Synarthrosis: Immobile, fixed joints.
• Amphiarthrosis: Joints with low mobility, including ligaments, cartilage, and symphysis.
• Synovial: Joints with high mobility.

5. Limitations

Prions and Disease Transmission

Prions are viral proteins that cause diseases. Direct transmission is not common, but the disease can appear several years after exposure to surgical instruments, needles, or other objects used on infected corpses. Therefore, it is crucial to destroy these instruments. STH or GH, this hormone found in the pituitary of dead bodies, requires disinfection of equipment to prevent contamination of the conjunctiva and injured nerve or blood tissue.

Tuberculosis Transmission and Disinfection

Tuberculosis is transmitted through inhalation. When handling fresh infected lungs, they should be perfused with sliced formalin before using routine disinfectants. This increases the time for disinfestation.

Other Infections and Handling