Sehs
G3N tutors you through the full International Sehs syllabus offline — from Body parts and their movement, Why we exercise: health and fun, Basic movement skills: running, jumping, throwing, catching and more — with adaptive lessons, instant quizzes, flashcards and exam-ready summaries.
Syllabus
What you’ll cover in Sehs.
The complete topic outline G3N teaches, mapped to the International curriculum.
Phase 1 (KG)
8 topicsBody parts and their movement
Why we exercise: health and fun
Basic movement skills: running, jumping, throwing, catching
Keeping safe during physical activity
Rest and sleep for a healthy body
Healthy food choices and energy
Sports and games from different cultures
Teamwork and fair play
Phase 2 (Grades 1-2)
8 topicsMuscles and bones: how they help us move
Heart rate: what happens when we exercise
Warm-up and cool-down
Fundamental movement patterns: balance, coordination
Healthy habits: water, food, sleep, exercise
Different types of sports and activities
Cooperation and respect in games
Basic first aid: what to do if someone gets hurt
Phase 3 (Grades 3-4)
8 topicsSkeletal system: bones and joints
Muscular system: major muscle groups
Cardiovascular fitness: heart and lung health
Components of fitness: strength, flexibility, endurance
Nutrition: macronutrients, micronutrients, hydration
Motor skills: gross and fine motor development
Sports techniques and practice
Setting fitness goals and tracking progress
Phase 4 (Grades 5-6)
8 topicsBody systems in exercise: cardiovascular, respiratory, muscular
Energy systems: aerobic and anaerobic overview
Training principles: overload, progression, specificity
Biomechanics basics: force, levers, projectile motion
Sports psychology: motivation, goal setting, concentration
Nutrition for performance: carbohydrates, protein, fats, timing
Injury prevention and safe exercise
Measurement of physical performance: fitness testing
MYP 1 (Grade 6)
8 topicsSkeletal system: bones, joints, ligaments, cartilage
Muscular system: muscle types, tendons, antagonistic pairs
Cardiovascular system: heart anatomy and blood circulation
Respiratory system: lungs, gas exchange, breathing mechanics
Components of health-related fitness: cardiovascular, strength, flexibility, body composition
Principles of training: FITT (frequency, intensity, time, type)
Warm-up, cool-down, and injury prevention
Nutrition basics: balanced diet and hydration
MYP 2 (Grade 7)
8 topicsEnergy systems: ATP-PC, lactic acid, aerobic — overview
Heart rate: resting, maximal, target heart rate zones
Muscle fibre types: slow and fast twitch
Biomechanics: Newton's laws applied to sport
Levers in the body: classes and mechanical advantage
Skill classification: open/closed, discrete/serial/continuous
Stages of learning: cognitive, associative, autonomous
Sports psychology: anxiety, arousal, performance (Inverted U)
MYP 3 (Grade 8)
8 topicsCardiovascular responses to exercise: stroke volume, cardiac output, oxygen uptake
Respiratory responses: tidal volume, breathing rate, VO2 max
Flexibility: types of stretching, range of motion
Body composition: lean mass, fat mass, BMI limitations
Nutrition for sport: carbohydrate loading, protein for muscle repair
Ergogenic aids: legal supplements, prohibited substances
Injury types and basic first aid in sport
Talent identification and long-term athlete development
MYP 4-5 (Grades 9-10)
9 topicsEnergy system interactions and training specificity
Periodisation: macrocycle, mesocycle, microcycle
VO2 max, lactate threshold, and aerobic capacity measurement
Biomechanical analysis: video analysis, force plates
Feedback and skill acquisition: intrinsic and extrinsic
Mental toughness: resilience, self-efficacy, visualisation
Measurement tools: fitness tests, data collection, interpretation
Ethics in sport: fair play, doping, inclusion and diversity
Sports injuries in depth: prevention, treatment, rehabilitation
Anatomy
8 topicsSkeletal system: bone types, joints (synovial, cartilaginous, fibrous), range of motion
Muscular system: muscle fibre types (slow twitch Type I, fast twitch Type IIa and IIx)
Muscle contraction mechanisms: sliding filament theory, neuromuscular junction
Lever systems in the body: first, second, third class levers and mechanical advantage
Antagonistic muscle pairs and force production
Postural muscles and core stability
Connective tissues: tendons, ligaments, cartilage — structure and function
Anatomical directional terminology and planes of movement
Exercise physiology
8 topicsCardiovascular responses to exercise: cardiac output, stroke volume, heart rate
Respiratory responses: tidal volume, breathing rate, gas exchange efficiency
Blood redistribution: vasodilation, vasoconstriction, cardiac muscle changes
Oxygen consumption: VO2, VO2 max, oxygen deficit, EPOC
Lactate threshold and its significance for endurance performance
Physiological adaptations to aerobic training: cardiac hypertrophy, capillarisation
Physiological adaptations to resistance training: hypertrophy, neural adaptation
Detraining: reversibility of training adaptations
Energy systems
8 topicsATP structure and function: the universal energy currency
ATP-PC system: phosphocreatine resynthesis, duration, and power output
Lactic acid system: glycolysis, lactate production, duration, and intensity
Aerobic system: Krebs cycle, electron transport chain, ATP yield
Interactions between energy systems during exercise
Energy system continuum: intensity and duration interactions
Fuel sources: carbohydrates, fats, protein — utilisation during exercise
Recovery processes: oxygen debt, lactate clearance, phosphocreatine restoration
Movement analysis and biomechanics
8 topicsPlanes of movement: sagittal, frontal, transverse
Axes of rotation: longitudinal, transverse, antero-posterior
Newton's laws applied to sport: inertia, acceleration, action-reaction
Projectile motion: angle of release, velocity, gravity effects
Force: net force, ground reaction force, force-time curves
Linear kinematics: displacement, velocity, acceleration in sport
Angular kinematics: angular velocity, angular momentum, conservation
Biomechanical principles: balance, centre of mass, stability
Skill acquisition in sport
8 topicsClassification of skills: open/closed, fine/gross, discrete/serial/continuous
Stages of learning: cognitive, associative, autonomous (Fitts and Posner)
Transfer of learning: positive, negative, bilateral
Types of practice: massed, distributed, whole, part, mental
Feedback: intrinsic, extrinsic, knowledge of results, knowledge of performance
Information processing model: input, decision-making, output, feedback
Memory systems: short-term sensory, working memory, long-term memory
Reaction time and anticipation in skilled performance
Measurement and evaluation of performance
8 topicsPrinciples of testing: validity, reliability, objectivity
Health-related fitness tests: VO2 max (multi-stage fitness test, Cooper), strength (dynamometer), flexibility (sit and reach)
Skill-related fitness tests: speed (30m sprint), power (vertical jump), agility (Illinois agility run)
Body composition assessment: BMI, skinfold measurement, bioelectrical impedance
Normative data: interpreting results against population norms
Heart rate monitors, GPS, and wearable technology in performance analysis
Statistical analysis: mean, range, standard deviation in SEHS context
Designing a fitness testing battery for a specific athlete
Nutrition and metabolism
8 topicsMacronutrients: carbohydrates (glycaemic index), proteins (amino acids), fats (types)
Micronutrients: vitamins and minerals important for athletic performance
Hydration: water balance, sweat rate, electrolytes, dehydration effects
Pre-competition, during, and post-exercise nutrition strategies
Carbohydrate loading: protocols, mechanisms, sports applicability
Protein requirements for hypertrophy and recovery
Weight management in sport: healthy and unhealthy practices
Ergogenic aids: creatine, caffeine, beta-alanine — evidence and ethics
Sport psychology and options (HL)
10 topicsMotivation: intrinsic vs extrinsic, achievement motivation theory
Arousal, anxiety, and performance: Inverted-U hypothesis, catastrophe theory, IZOF
Goal setting: SMART goals and their application in sport
Self-efficacy and confidence: Bandura's model
Stress and coping strategies: problem-focused and emotion-focused coping
Group dynamics: cohesion, leadership, roles, social loafing
Aggression in sport: hostile vs instrumental, frustration-aggression hypothesis
Imagery and mental rehearsal: internal vs external imagery
Burnout and overtraining syndrome: causes, signs, prevention
Psychological profiling and mental skills training programmes
How G3N helps
Turn this syllabus into a pass.
Concept-led learning
Lessons that match inquiry-based, conceptual international curricula rather than rote answers.
Practice on demand
Generate quizzes for any unit and review marked answers with explanations.
Summarise anything
Turn dense readings into clear, structured study notes in seconds.
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