Notes, summaries, assignments, exams, and problems for Sport and physical education

American Perspectives on Motor Development

Studies related to the perceptual-motor area in the United States have been conducted by authors from diverse backgrounds. This section examines the contributions of H. Williams, B.J. Cratty, and David L. Gallahue.

1. H. Williams: The Concept of Perceptual-Motor Development

Previously, the focus on motor development referred to changes and refinements in human motor behaviors. Williams shifted this focus toward improvements in perceptual-motor behaviors, which are categorized into four areas:

• Gross Motor Skills: Mobilizing the body in a coordinated way, such as jumping, running, throwing, hitting, and receiving.
• Fine Motor Skills: Related to the control of small objects using hands, fingers, and eyes (oculo-

Significant Curricular Adaptations

In specific situations, we must take steps to support students who deviate significantly from the established curriculum. Generally, this applies to pupils with more serious, often permanent, learning difficulties. In these cases, mere didactic intervention may be insufficient, necessitating the modification of learning sequences, content selection, and the adjustment of assessment processes.

We strive to be cautious before implementing significant adjustments. However, sometimes this is the only option for students to reach their fullest potential. These adaptations may include:

• Modifying the type and degree of learning achievement.
• Prioritizing specific purposes, content, or evaluation criteria without abandoning

Understanding Physical Flexibility

Types of Flexibility

• Dynamic: Involves specific movements to achieve a greater, desired range of motion.
• Static: Holding positions with slow, gradual changes according to one's physical possibilities.
• Passive: Flexibility achieved with the help of a partner or an instrument.
• Active: The athlete is solely responsible for achieving and holding the positions.

Stretching Techniques

Stretching involves progressively lengthening muscles to make them more elastic, typically for a duration of 10-30 minutes.

Methods for Building Strength

Strength can be developed through various methods, including bodyweight exercises, partner exercises, multi-hops, multi-throws, and weight training.

Categories of Sports and Recreation

Leisure

Neurological Basis of Motor Control

Question: Cup Manipulation

• Ventromedial pathway: Establishes proper body positioning to initiate movement perception.
• Tectospinal tract: Facilitates direct visual guidance of the eyes.
• Reticulospinal tract: Maintains trunk stability and posture.
• Association areas (Prefrontal and Posterior Parietal): The posterior parietal area processes target information and tactile sensory stimulation to guide limb movement.
• Secondary motor area: Responsible for the production of motor programs.

Conclusion: Reaching for a vessel requires extension. Muscle spindles provide feedback on length and tension, allowing for precise movement without impact. This is defined as the phase muscle pattern.

Precision Grasping and Sensory Feedback

Grasping

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

Sports Hygiene and Warm-up Phases

Sports hygiene consists of a series of habits that help us make the most of physical exercise and protect us against possible injuries.

Warm-up Phases

• Part 1: General exercises (dynamic movements performed smoothly to mobilize all parts of the body).
• Part 2: Flexibility exercises (localized exercises, usually involving stretching).
• Part 3: Specific exercises for sport (actions similar to those performed in the sport played later).

The Importance of Posture

Posture is the position in which the human body is maintained regularly. It must maintain a constant battle against an "external enemy": gravity. The human body must overcome this to keep the body position in balance.

Often, incorrect postures can apparently look...

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...

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...

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...

Core Principles of Physical Training

• Principle of Adaptation: The human organism is capable of resisting and habituating to physical exercise through consistent practice.
• Principle of Progression: The human body is capable of bearing progressively greater efforts over time.
• Volume: The total amount of physical exercise performed. Increasing volume progressively allows the body to adapt to physical demands.
• Intensity: The ratio between the current level of work and its maximum possible value (Intensity = Current / Maximum).
• Load: The product of volume and intensity. Increase volume gradually. (Load = Volume x Intensity).
• Principle of Continuity: Physical exercise must be performed frequently enough to maintain the positive effects of overcompensation.