Essentials of Exercise Science: Lessons 3 & 4

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Questions and Answers

What is muscular strength defined as?

  • The maximal force a muscle or muscle group can exert during a contraction (correct)
  • The maximal capacity of the heart to deliver oxygen
  • The range of motion available at a joint
  • The ability to exert a force repeatedly over time

Which of the following is NOT a major component of physical fitness?

  • Cardiovascular Endurance
  • Dietary Balance (correct)
  • Flexibility
  • Muscular Fitness

What percentage of total resistance during joint movement is contributed by ligaments?

  • 41%
  • 2%
  • 47% (correct)
  • 10%

Which factor does NOT influence flexibility?

<p>Body Mass Index (A)</p> Signup and view all the answers

What describes cardiovascular endurance?

<p>The maximal capacity for heart and lungs to deliver oxygen (D)</p> Signup and view all the answers

What external factor is essential for lengthening a muscle fiber?

<p>External Force (C)</p> Signup and view all the answers

How does muscular endurance differ from muscular strength?

<p>It involves lower intensity activities over a longer period (D)</p> Signup and view all the answers

Which of the following factors can affect flexibility due to past injury?

<p>Joint Structure (A)</p> Signup and view all the answers

What happens to a very fit person regarding further improvements in performance?

<p>They are less likely to improve further. (A)</p> Signup and view all the answers

What does the introduction of a new exercise primarily affect?

<p>Neuromuscular and motor-unit activation response. (A)</p> Signup and view all the answers

Which stage in the General Adaptation Syndrome model is characterized by an initial burst of energy in response to stress?

<p>Alarm stage (C)</p> Signup and view all the answers

During the alarm stage of General Adaptation Syndrome, which hormones are released?

<p>Cortisol and epinephrine (A)</p> Signup and view all the answers

What is one effect of stress on an individual according to the General Adaptation Syndrome model?

<p>It can negatively impact psychological and physical health. (D)</p> Signup and view all the answers

How long does the 'remarkable gains' phase in the alarm stage typically last?

<p>2-3 weeks (A)</p> Signup and view all the answers

What is one typical consequence of the resistance stage in General Adaptation Syndrome?

<p>The body adapts effectively to the stressor. (A)</p> Signup and view all the answers

What does excessive chronic stress during the exhaustion stage typically lead to?

<p>Increased likelihood of injury or illness. (D)</p> Signup and view all the answers

What is the primary function of the Phosphagen System?

<p>To provide energy for short bursts of high intensity (A)</p> Signup and view all the answers

What is the maximum duration for which anaerobic glycolysis can efficiently produce ATP?

<p>From 1 to 3 minutes (A)</p> Signup and view all the answers

Which statement best describes aerobic glycolysis?

<p>It produces a large amount of ATP from fatty acids (B)</p> Signup and view all the answers

Which component is NOT part of the Phosphagen System?

<p>Fats (B)</p> Signup and view all the answers

What is the primary source of energy for anaerobic glycolysis?

<p>Glucose and glycogen (C)</p> Signup and view all the answers

What restricts the anaerobic glycolysis system during sustained activity?

<p>Accumulation of lactic acid (C)</p> Signup and view all the answers

How long does the Phosphagen System typically provide energy?

<p>5-10 seconds (B)</p> Signup and view all the answers

Which factor does NOT influence the contribution of energy systems?

<p>Body fat percentage (A)</p> Signup and view all the answers

What is a key source of energy for aerobic glycolysis?

<p>Fatty acids (D)</p> Signup and view all the answers

Which statement about ATP production in aerobic glycolysis is true?

<p>It requires a continuous supply of oxygen for sustained ATP production. (D)</p> Signup and view all the answers

What is the first step in the Hold-Relax with Agonist contraction PNF stretching method?

<p>Apply a passive pre-stretch for a duration (B)</p> Signup and view all the answers

What is the primary characteristic of PNF stretching that makes it effective?

<p>It involves reciprocal inhibition and autogenic inhibition (B)</p> Signup and view all the answers

According to the principle of Specificity, what is essential for a training program?

<p>Matching activities to the desired outcomes (B)</p> Signup and view all the answers

During the Contract-Relax PNF stretching method, what is the immediate action after the individual pushes against the trainer's force?

<p>Relax the muscle (B)</p> Signup and view all the answers

What does the principle of Diminishing Returns state?

<p>Fitness improvements plateau as one approaches genetic limits (C)</p> Signup and view all the answers

What occurs when training ceases, according to the principle of Reversibility?

<p>Physical improvements reverse to pre-training levels (A)</p> Signup and view all the answers

In PNF stretching, what is performed after the individual relaxes in the Hold-Relax method?

<p>Perform a passive stretch of the antagonist muscle group (C)</p> Signup and view all the answers

Which of the following is a major goal of applying the Overload principle?

<p>Gradually increasing physical demands for strength development (D)</p> Signup and view all the answers

What is involved in the first step of the Contract-Relax PNF technique?

<p>Engaging in concentric contractions of the antagonist (D)</p> Signup and view all the answers

In the context of PNF stretching, what best describes the term 'agonist'?

<p>A muscle that assists in producing the desired movement (B)</p> Signup and view all the answers

What is the outcome of systematically applying the principle of Progression in training?

<p>Continual enhancement of physical performance (A)</p> Signup and view all the answers

How long should each hold occur during the Hold-Relax phase of PNF stretching?

<p>6 seconds (D)</p> Signup and view all the answers

What does the term 'autogenic inhibition' refer to in PNF stretching?

<p>Relaxation of a muscle after intense contraction (D)</p> Signup and view all the answers

What effect does applying the Overload principle have on an individual’s training approach?

<p>Promotes adaptation and strength gains over time (A)</p> Signup and view all the answers

What role does the agonist muscle play during a bicep curl?

<p>It is the primary muscle responsible for generating force. (B)</p> Signup and view all the answers

Which muscle group would be considered the antagonist during the upward phase of a bicep curl?

<p>Triceps brachii (C)</p> Signup and view all the answers

What characterizes an eccentric contraction?

<p>The muscle lengthens and returns to its original state. (C)</p> Signup and view all the answers

What is the primary function of synergist muscles during a joint action?

<p>To assist the prime mover and stabilize the joint. (B)</p> Signup and view all the answers

During which phase of a bicep curl does the biceps brachii exhibit concentric contraction?

<p>During the upward phase of the curl. (C)</p> Signup and view all the answers

Which of the following best defines the antagonist muscle's role?

<p>It provides opposing force to the movement of the prime mover. (B)</p> Signup and view all the answers

Which type of muscular contraction involves the muscle overcoming a resistive force while shortening?

<p>Concentric contraction (C)</p> Signup and view all the answers

In terms of muscle function during movement, what is a key characteristic of synergist muscles?

<p>They can act as stabilizers or neutralizers. (D)</p> Signup and view all the answers

What is the correct definition of the anatomical position?

<p>Standing with heads, eyes, and palms facing forward (C)</p> Signup and view all the answers

Which plane of motion divides the body into top and bottom halves?

<p>Transverse Plane (A)</p> Signup and view all the answers

In anatomical terminology, what does 'proximal' refer to?

<p>Closer to the attached end of the limb (D)</p> Signup and view all the answers

According to Newton’s 1st Law, what will happen to a body at rest?

<p>It will remain at rest unless acted upon by a force (B)</p> Signup and view all the answers

Which category does the Law of Reaction fall under in Newton's laws?

<p>Third Law (D)</p> Signup and view all the answers

What does 'medial' refer to in anatomical terms?

<p>Toward the midline of the body (C)</p> Signup and view all the answers

What is the relationship between the force and mass as described in Newton’s 2nd Law?

<p>Force is inversely proportional to mass (B)</p> Signup and view all the answers

Which of the following describes the action of muscles during a bicep curl at the sticking point?

<p>Experiencing a mechanical disadvantage (C)</p> Signup and view all the answers

Which of the following terms refers to being closer to the body surface?

<p>Superficial (A)</p> Signup and view all the answers

What is kinesiology primarily the study of?

<p>Human body movements (D)</p> Signup and view all the answers

Which muscle action is best characterized by an eccentric contraction?

<p>Lowering a dumbbell in a bicep curl (C)</p> Signup and view all the answers

What are the three planes of motion in kinesiology?

<p>Frontal, Sagittal, Transverse (B)</p> Signup and view all the answers

How does understanding kinesiology benefit personal trainers?

<p>Helps in analyzing movements related to exercise (C)</p> Signup and view all the answers

Which term describes movement toward the back of the body?

<p>Posterior (C)</p> Signup and view all the answers

Flashcards

PNF Stretching

Proprioceptive neuromuscular facilitation (PNF) stretching is a type of stretching that uses contractions to increase flexibility and range of motion.

Contract-Relax PNF

A type of PNF stretching that involves a pre-stretch followed by a concentric contraction of the targeted muscle group. The muscle is then relaxed, allowing passive stretch.

Hold-Relax PNF

PNF stretching involving a passive pre-stretch, a 6-second isometric contraction, followed by a passive stretch.

Specificity (Training)

Only the parts of the body used in the training program will improve.

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Progression (Training)

Gradually increasing the intensity or duration of training.

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Overload (Training)

Increasing the physical demands on the body beyond its normal load.

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Reversibility (Training)

Stopping training leads to decreased fitness levels.

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Diminishing Returns (Training)

Fitness improvements slow down as fitness gets better and approaches a natural limit.

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General Adaptation Syndrome (GAS)

A three-stage model describing how the body responds to stress, including exercise.

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Alarm stage (GAS)

Initial response to stress; body releases energy, increasing heart rate, blood pressure, and strength.

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Resistance stage (GAS)

The body adapts to the stressor and tries to maintain homeostasis.

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Exhaustion stage (GAS)

The body's resources become depleted if stressor persists and the body cannot adapt further.

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Alarm stage (exercise)

The body's initial response to exercise; increased energy, heart rate, blood pressure, and strength; lasting approximately 2-3 weeks

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Cortisol and Epinephrine

Hormones released in the alarm stage, facilitating the body's response to stress

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Progressive strength gains

Strength improvements that occur over time, with a new exercise introducing fresh muscular/neural activation and motor-unit response facilitating gains.

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Phosphagen System

The energy system that uses ATP and creatine phosphate for very short bursts of high-intensity exercise.

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ATP

Adenosine triphosphate; the primary source of cellular energy.

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Creatine Phosphate (CP)

A molecule that quickly replenishes ATP during high-intensity exercise.

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Anaerobic Glycolysis

Energy system using glucose/glycogen for ATP production without oxygen. Provides energy for activities lasting 1-3 minutes.

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Aerobic Glycolysis

Energy system using fatty acids for ATP production with oxygen, suitable for sustained activity.

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Energy System Interaction

The contribution of each energy system varies based on the intensity and duration of exercise.

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Intensity

The level of effort during an activity.

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Duration

The length of time an activity is performed.

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Agonist Muscle

The muscle primarily responsible for producing a movement.

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Antagonist Muscle

The muscle working opposite to the agonist, controlling the movement.

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Synergist Muscle

Muscle assisting the agonist in a movement.

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Concentric Contraction

Muscle shortens to produce force.

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Eccentric Contraction

Muscle lengthens while resisting force.

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General Adaptation Syndrome (GAS)

A three-stage model describing how the body responds to stress, including exercise.

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Alarm Phase (GAS)

Initial response to stress; body releases energy, increasing heart rate, blood pressure, and strength.

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Resistance Phase (GAS)

Body adapts to stressor; tries to maintain homeostasis.

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Exhaustion Phase (GAS)

Resources depleted if stressor continues; body cannot adapt further.

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Overtraining

Signs and symptoms that arise from excessive training.

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Physical activity

Bodily movements that come from skeletal muscle contraction and increases energy expenditure.

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Physical Fitness Components

Muscular Fitness, Cardiovascular Endurance, Flexibility, and Body Composition

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Muscular Strength

The maximal force a muscle or muscle group can generate.

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Anatomical Position

A person standing with head, eyes, and palms facing forward, feet together, toes forward, and arms hanging by the sides.

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Anterior

Toward the front of the body.

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Posterior

Toward the back of the body.

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Superior

Toward the head or upper part of the body.

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Inferior

Away from the head or toward the lower part of the body.

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Medial

Toward the midline of the body.

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Lateral

Away from the midline of the body.

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Proximal

Toward the attached end of a limb.

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Distal

Away from the attached end of a limb.

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Superficial

Closer to the body surface.

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Deep

Further beneath the body surface.

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Frontal Plane

Divides the body into front and back portions.

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Sagittal Plane

Divides the body into left and right portions.

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Transverse Plane

Divides the body into top and bottom portions.

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Kinesiology

The study of human and nonhuman body movements.

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Newton's 1st Law (Inertia)

A body at rest stays at rest and a body in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

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Newton's 2nd Law (Acceleration)

The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

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Newton's 3rd Law (Reaction)

For every action, there is an equal and opposite reaction.

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Study Notes

Essentials of Exercise Science

  • This is a lesson outline for exercise science.
  • Lesson 3 and 4 are covered in the provided documents.

Lesson 3: Flexibility Training

  • Factors contributing to flexibility:
    • Muscle and connective tissue properties
    • Ligaments (47%), Muscles (41%), Tendons (10%), Skin (2%)
    • Age, Gender, Joint structure/past injury, Tissue temperature, Circadian variations
  • Neurological properties of stretching:
    • Stretch response (muscle spindle) & stress-relaxation
    • Golgi tendon organ (GTO) response
    • Creep and stress relaxation
  • Types of stretches:
    • Static stretching (active/passive)
    • Dynamic stretching
    • Ballistic stretching
    • Myofascial release
    • Proprioceptive neuromuscular facilitation (PNF)

Lesson 3: General Training Principles

  • Specificity: Training must be tailored to the desired outcome/goal
  • Progression: Systematically increase resistance/duration
  • Overload: Exceeding normal loads in order to improve
  • Reversibility: Lack of training leads to loss of improvement (regression)
  • Diminishing returns: Improvement rate slows as fitness approaches peak performance

Lesson 3: General Adaptation Syndrome (GAS)

  • Alarm stage: Initial response to stress/exercise; increased energy, HR, BP.
  • Resistance stage: Body adapts to prolonged stress; elevated HR, BP, and muscular adaptation.
  • Exhaustion stage: Body's resources are depleted; fatigue, injury, illness

Lesson 3: Overtraining Syndrome

  • Symptoms: Decline in performance, change in appetite, weight loss, sleep disturbances, multiple colds.
  • Prevention: Periodization training (alternating easy, moderate, hard training days)

Lesson 3: Bioenergetics

  • ATP: Adenosine triphosphate (energy currency)
  • Energy systems:
    • Phosphagen system (0-10 seconds)
    • Anaerobic glycolysis (1-3 minutes)
    • Aerobic glycolysis (>3 minutes)

Lesson 4: Human Anatomy

  • Anatomical Position: Standing erect, forward-facing.
  • Anatomical terms: Anterior/posterior, superior/inferior, medial/lateral, proximal/distal, superficial/deep.
  • Planes of motion: Frontal, sagittal, transverse

Lesson 4: Kinesiology

  • Kinesiology: Study of human & nonhuman movements and mechanical aspects of the body.
  • Newton's Laws: Inertia, Acceleration, Reaction.
  • Force production (muscle types): Agonist (prime mover), antagonist (opposite action), synergist (assists prime mover)

Lesson 4: Types of Muscular Contractions

  • Concentric: Muscle shortens, overcoming resistance
  • Eccentric: Muscle lengthens while under tension
  • Isometric: Muscle contracts but doesn't change length

Lesson 4: "Joints, Movements, Planes, and Muscles"

  • Overview of joints, movements, planes, and muscles
  • Discusses various types of joints and their associated movements in each plane of motion (frontal, sagittal, transverse)

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