Comprehensive Study Guide for OCR Level 3 Physical Education - Applied Anatomy, Physiology, and Biomechanics

Joints, Muscles, and Functional Movement

• Joint Analysis and Muscular Control:

  • Shoulder Joint:
    • Movements: flexion, extension, abduction, adduction, horizontal flexion, horizontal extension, medial rotation, lateral rotation, and circumduction.
    • Muscles Involved: deltoid, latissimus dorsi, pectoralis major, trapezius, and teres minor.
  • Elbow Joint:
    • Movements: flexion and extension.
    • Muscles Involved: biceps brachii and triceps brachii.
  • Wrist Joint:
    • Movements: flexion and extension.
    • Muscles Involved: wrist flexors and wrist extensors.
  • Hip Joint:
    • Movements: flexion, extension, abduction, adduction, medial rotation, and lateral rotation.
    • Muscles Involved: iliopsoas, gluteus maximus, gluteus medius, gluteus minimus, adductor longus, adductor brevis, and adductor magnus.
  • Knee Joint:
    • Movements: flexion and extension.
    • Hamstring Group: biceps femoris, semi-membranosus, and semi-tendinosus.
    • Quadriceps Group: rectus femoris, vastus lateralis, vastus intermedius, and vastus medialis.
  • Ankle Joint:
    • Movements: dorsi flexion and plantar flexion.
    • Muscles Involved: tibialis anterior, soleus, and gastrocnemius.

• Planes of Movement:

  • Frontal Plane: Divides the body into front and back portions.
  • Transverse Plane: Divides the body into upper and lower portions.
  • Sagittal Plane: Divides the body into left and right portions.

• Functional Roles of Muscles:

  • Agonist: The prime mover muscle responsible for the movement.
  • Antagonist: The muscle that opposes the agonist and must relax for movement to occur.
  • Fixator: A muscle that stabilizes the origin of the agonist to increase efficiency.

• Types of Muscular Contraction:

  • Isotonic: Contraction where the muscle changes length.
    • Concentric: Muscle shortens while under tension.
    • Eccentric: Muscle lengthens while under tension.
  • Isometric: Contraction where the muscle develops tension but remains at a constant length.

Neuromuscular System and Fibre Types

• Skeletal Muscle Contraction Mechanisms:

  • Motor Units: Composed of a motor neuron and all the muscle fibres it innervates.
  • Nervous Stimulation:
    • An action potential travels down the motor neuron.
    • Neurotransmitters facilitate the transmission across the neuromuscular junction.
    • 'All or none' law: All muscle fibres in a motor unit will contract with maximum force if the stimulation threshold is met; if not met, none will contract.

• Muscle Fibre Types:

  • Slow Oxidative (SO): High fatigue resistance, used for low-intensity, long-duration activities.
  • Fast Oxidative Glycolytic (FOG): Intermediate properties, used for moderate-to-high intensity.
  • Fast Glycolytic (FG): High force production but fatigues quickly, used for explosive movements.
  • Recruitment Patterns: The body recruits different fibre types based on the intensity and duration of the exercise and during the recovery phase.

Cardiovascular System

• Resting Cardiovascular State:

  • Key Metrics: Heart Rate ($HR$), Stroke Volume ($SV$), and Cardiac Output ($Q$).
  • Formula: $Q = HR \times SV$
  • Cardiac Cycle:
    • Diastole: The period of relaxation when the heart fills with blood.
    • Systole: The period of contraction when the heart pumps blood out.
  • Conduction System: The electrical pathway regulating the cardiac cycle.

• Cardiovascular System During Exercise and Recovery:

  • Response to Intensity: Changes in $HR$, $SV$, and $Q$ proportional to exercise intensity.
  • Redistribution of Blood Flow (Vascular Shunt Mechanism):
    • Regulated by the vasomotor centre.
    • Controlled via the action of arterioles and pre-capillary sphincters.
  • Venous Return: Mechanisms that ensure blood returns to the heart during activity.
  • Regulation of Heart Rate:
    • Neural factors: Autonomic nervous system inputs.
    • Hormonal factors: Impact of adrenaline/epinephrine.
    • Intrinsic factors: Temperature changes and venous return (Starlings Law).

Respiratory System

• Respiratory State at Rest:

  • Metrics: Breathing frequency ($f$), Tidal Volume ($V_T$), and Minute Ventilation ($\dot{V}_E$).
  • Formula: $\dot{V}_E = f \times V_T$
  • Mechanics of Breathing (Resting):
    • Inspiration: Diaphragm and external intercostals contract.
    • Expiration: Passive relaxation.

• Respiratory System During Exercise:

  • Additional Muscles for Inspiration: sternocleidomastoid and pectoralis minor.
  • Additional Muscles for Expiration: internal intercostals and rectus abdominis.
  • Regulation of Breathing:
    • Controlled by neural and chemical factors (e.g., $CO_2$ levels, pH).
  • Gas Exchange (Alveoli and Muscles):
    • Influenced by changes in pressure gradients.
    • Affected by the dissociation of oxyhaemoglobin.

Energy Systems and ATP Resynthesis

• ATP as Energy Currency:

  • Breakdown: $ATP \rightarrow ADP + P + \text{energy}$
  • Resynthesis: $ADP + P + \text{energy} \rightarrow ATP$

• Energy Systems:

  • ATP-PC System (Phosphocreatine): Anaerobic, occurs in the sarcoplasm, high power, very low capacity, controlled by creatine kinase.
  • Glycolytic System: Anaerobic, occurs in the sarcoplasm, fuel is glycogen/glucose, produces lactic acid.
  • Aerobic System: Aerobic, occurs in the mitochondria, utilizes carbohydrates and fats, high ATP yield.
  • System Attributes: Each system is analyzed based on: type of reaction, fuel used, specific site, controlling enzyme, ATP yield, specific stages, and by-products.

• Energy Continuum and Interplay:

  • The predominant system depends on the intensity and duration of exercise.
  • Intermittent exercise involves a complex interplay of systems based on work-to-relief ratios and fitness levels.

Diet, Nutrition, and Ergogenic Aids

• Balanced Diet Components:

  • Carbohydrates, proteins, fats, minerals, vitamins, fibre, and water.
  • Management of energy intake vs. energy expenditure (energy balance).

• Ergogenic Aids:

  • Pharmacological: Anabolic steroids, Erythropoietin (EPO), Human Growth Hormone (HGH).
  • Physiological: Blood doping, Intermittent Hypoxic Training (IHT), and cooling aids.
  • Nutritional: Meal timing/composition, hydration, glycogen loading, creatine, caffeine, bicarbonate, and nitrate.

Training Methods and Periodisation

• Aerobic Training:

  • VO2max (Maximal Oxygen Uptake): Affected by physiological make-up, training, age, and gender.
  • Evaluation: Laboratory direct gas analysis, NCF multi-stage fitness test, Queen's College step test, Cooper 12-minute run.
  • Methods: Continuous training, High Intensity Interval Training (HIIT).

• Strength Training:

  • Types: Strength endurance, maximum strength, explosive/elastic strength, static and dynamic strength.
  • Evaluation: Grip dynamometer, 1 Repetition Maximum ($1RM$), press-up/sit-up test, vertical jump test.
  • Adaptations: Neural changes, muscle/connective tissue hypertrophy, and metabolic shifts.

• Flexibility Training:

  • Types: Static (active/passive) and dynamic.
  • Evaluation: Sit and reach test, goniometer.
  • Methods: PNF (Proprioceptive Neuromuscular Facilitation), ballistic, and isometric stretching.

• Periodisation of Training:

  • Cycles: Macrocycle (long term), Mesocycle (medium term), Microcycle (short term).
  • Phases: Preparatory, competitive, transition, and tapering.

• Lifestyle Diseases: Training impacts risks for CHD, stroke, atherosclerosis, heart attack, asthma, and COPD.

Injury Prevention and Rehabilitation

• Classification of Injuries:

  • Acute: Sudden stress (hard tissue, soft tissue, concussion).
  • Chronic: Continuous stress (soft tissue, hard tissue).

• Risk Factors:

  • Intrinsic: Individual variables, training effects.
  • Extrinsic: Poor technique, incorrect equipment, inappropriate intensity.

• Assessment and Management:

  • SALTAPS: See, Ask, Look, Touch, Active, Passive, Strength.
  • PRICE: Protection, Rest, Ice, Compression, Elevation.
  • 6 R's (Concussion): Recognise, Remove, Refer, Rest, Recover, Return.

• Rehabilitation Treatments: Stretching, massage, heat/cold/contrast therapies, anti-inflammatory drugs, physiotherapy, surgery.

Biomechanics

• Newton's Laws of Motion:

  1. First Law (Inertia): A body continues in its state of rest or uniform motion unless acted upon by an external force.
  2. Second Law (Acceleration): Force equals mass times acceleration ($F = m \times a$).
  3. Third Law (Reaction): For every action, there is an equal and opposite reaction.

• Forces and Motion:

  • Types include weight, reaction, friction, and air resistance.
  • Centre of Mass: Point where the mass of a body is concentrated; affects stability.

• Lever Systems:

  • Components: Load, Effort, Fulcrum, Effort arm, Load arm.
  • Classes: 1st class, 2nd class (high mechanical advantage), 3rd class.

• Linear and Angular Motion:

  • Linear: Distance, displacement, speed, velocity, acceleration.
  • Angular: Created by eccentric force around an axis (longitudinal, frontal, transverse).
  • Moment of Inertia: Affected by mass and mass distribution; inversely related to angular velocity during rotation ($\text{Moment of Inertia} \times \text{Angular Velocity} = \text{Angular Momentum}$).