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How Singapore Education Works | International Baccalaureate® (IB) Sports, Exercise and Health Science HL vs SL 2027: Physiology, Biomechanics and IA

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by

eduKate Asia
Three students sit around open books and worksheets at a classroom table, reading, writing and discussing the work together.

Quick answer: IB Sports, Exercise and Health Science (SEHS) is an experimental science combining exercise physiology and nutrition, biomechanics, sports psychology and motor learning. The revised course was first assessed in May 2026. SL and HL sit Paper 1A/1B and Paper 2; the individual scientific investigation is worth 24% under the 2027 examiner instructions. SEHS is not the same as Singapore SEC Exercise and Sports Science.

This guide explains what the IB subject teaches, how practical work and assessment operate, what HL adds, how to plan a safe scientific investigation and how to check university prerequisites.

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What is IB Sports, Exercise and Health Science?

The International Baccalaureate Diploma Programme Sports, Exercise and Health Science (SEHS) is an experimental science course. It investigates the science that underpins movement, physical performance, exercise and health. Students study human physiology, biomechanics, sports psychology and nutrition while learning to design and interpret practical investigations.

The subject is not simply physical education, coaching or a course about playing sport. It asks why the body responds to exercise, how force and movement can be measured, how motor skills are acquired and how scientific evidence can be used to understand performance. A student may enjoy sport but still need to develop scientific vocabulary, data analysis and experimental reasoning.

For Singapore families, one important distinction is that IB SEHS is a Diploma Programme science subject for learners around ages 16–19. It is not the same qualification as Singapore’s SEC Exercise and Sports Science (ESS), which has its own national syllabus, coursework and examination arrangements. The names overlap, but the age group, assessment framework and award are different.

What changed for the 2027 IB examination cohort?

The IB launched the revised SEHS course in February 2024 for first teaching in August 2024, with first assessment in May 2026. This revised framework is therefore the relevant one for students planning 2027 examinations, unless a later official update applies to the school or session.

The updated course places more emphasis on interconnected concepts, experimental skills and the nature of science. It removes the former option-topic structure and brings relevant content into the revised course at SL and HL. Old online notes that present separate options such as “optimising physiological performance” or “psychology of sport” as the current assessment structure may be describing the earlier syllabus.

The current course culminates in two external examination papers and one individual scientific investigation. Students also undertake the collaborative sciences project as part of the science learning experience. This gives the subject an explicit practical and interdisciplinary dimension.

The three main themes of SEHS

The first theme is exercise physiology and nutrition of the human body. Students investigate how body systems respond to physical activity, how energy is supplied and used, and how nutrition relates to exercise and health. The course encourages learners to connect physiological mechanisms instead of memorising isolated facts about muscles, respiration and food.

The second theme is biomechanics. It examines the forces and movement patterns involved in human motion. Students learn how movement can be described, analysed and explained using concepts such as force, momentum, impulse, torque, balance and the mechanics of joints and limbs.

The third theme is sports psychology and motor learning. This explores psychological factors that influence performance, as well as how skills are acquired, practised and retained. Students should be able to distinguish a plausible explanation from an unsupported claim about motivation or a particular training technique.

These themes interact. A sprinting performance depends on energy supply, mechanical technique, skill learning, decision-making and psychological conditions. A strong SEHS student can explain how several factors combine, while recognising which evidence supports each part of the explanation.

How does exercise physiology work?

Exercise physiology asks how the body responds acutely to activity and adapts over time. Students examine physiological systems and how exercise affects oxygen transport, circulation, breathing, energy pathways, fatigue and recovery. The key learning is not a list of organ names; it is the relationship between a stimulus, a body response and an observable change.

For example, during exercise, heart rate and breathing may change as the body responds to increased demand. A student should explain what those measurements can indicate and what they cannot show on their own. A faster heart rate does not automatically mean one athlete is fitter than another; age, activity, intensity, environment and individual circumstances matter.

When studying training adaptation, distinguish a short-term response from a longer-term change. A single exercise session cannot establish that a training programme has caused a lasting improvement. A credible scientific conclusion requires an appropriate comparison and sufficient evidence.

Nutrition and human performance

The nutrition content explores how nutrients contribute to the body’s function and how dietary choices relate to exercise and health. Students should understand relevant concepts such as energy intake, energy use, hydration and the roles of macronutrients and micronutrients in the body.

A common misconception is to treat one food, supplement or diet as a universal performance solution. SEHS encourages evidence-based reasoning. Nutritional needs depend on the individual, training demand, health status and other factors. A claim about a supplement should be supported by reliable evidence and evaluated for its limits and risks.

Students should also understand that an academic investigation of nutrition is not personal medical advice. A school project should not prescribe diets or encourage unsafe changes to eating or hydration. Questions involving health concerns should be discussed with an appropriately qualified health professional.

Biomechanics: how force and movement explain performance

Biomechanics applies mechanical principles to human movement. Students explore how forces act on the body, how movement can be represented and how technique relates to performance. This can involve observing movement, using video analysis, collecting measurements and interpreting patterns.

Consider a vertical jump. The result depends on the interaction of force production, body mass, movement coordination, take-off mechanics and other conditions. A student should not claim that one camera angle or a single jump demonstrates the complete cause of a performance difference.

A useful movement analysis identifies the phase being studied, the variables being measured and the physical principles involved. The student can then explain why a change in technique may influence the outcome, while acknowledging that real movement is complex and cannot always be reduced to one measurement.

Sports psychology and motor learning

Sports psychology considers how attention, confidence, motivation, anxiety, group dynamics and other psychological factors may relate to performance. Motor learning investigates how movement skills are acquired, practised and retained. These areas require careful interpretation of evidence because a person’s reported feelings and observed performance are different types of information.

For example, a student might compare performance in a familiar and an unfamiliar task. They should consider whether practice time, prior experience, fatigue, instructions and task difficulty could explain the difference. It is not enough to say that confidence caused a better result because the participant reported feeling confident.

Motor learning also distinguishes performance during practice from lasting learning. A learner may improve while repeating a task with guidance but fail to retain the skill later or transfer it to a different situation. SEHS asks students to consider how practice conditions and assessment timing affect the conclusions they draw.

What makes HL different from SL?

IB recommends 150 teaching hours at SL and 240 at HL. Both levels study the same broad themes and undertake practical and investigative work. HL includes additional content and greater breadth and depth in the scientific ideas, so students need to manage more course material alongside the full Diploma.

The additional level of study may suit a student interested in sport science, exercise science, physiology, biomechanics, rehabilitation-related research or related university fields. However, a student should not assume SEHS HL is required for every sports-related degree or that it replaces Biology, Chemistry, Physics or Mathematics where a university specifies one of those subjects.

The question is whether the student can handle scientific explanation, data and investigation while maintaining the rest of the Diploma. A learner with strong athletic experience but weak understanding of measurement, graphs or scientific variables may need foundational teaching before HL becomes sustainable.

How is the 2027 SEHS examination structured?

The revised course has two external examination papers. Paper 1 includes Paper 1A multiple-choice questions and Paper 1B data-analysis questions. Paper 2 contains short-answer and extended-response questions that place scientific knowledge and skills into sports, exercise and health contexts.

The current 2027 examiner guidance states that the individual scientific investigation is worth 24% of the overall subject grade. It is marked by the teacher and externally moderated by the IB. The remaining assessment is external. Students should follow the actual guide and the school’s session-specific instructions rather than transfer weightings from the older SEHS course.

Paper 1A checks understanding of the course content and concepts. Paper 1B asks students to interpret data and may assess experimental skills. Paper 2 requires more developed answers, where learners explain and apply scientific knowledge to unfamiliar or realistic contexts.

A student who only memorises anatomy terms is not ready for all these demands. They need to work with evidence, identify variables, interpret figures, evaluate a claim and explain what the data support.

How to approach Paper 1B data questions

Begin with the title, axes, units and experimental conditions. Identify the variable being changed and the outcome being measured. Ask whether the graph or table shows an individual observation, group average, trend over time or difference between conditions.

For example, a graph may compare heart-rate recovery under two exercise conditions. A student should check the participants, exercise intensity, measurement intervals and any relevant control variables before claiming one condition improved recovery. A visible difference may be interesting but still not prove the explanation proposed.

Separate description from inference. “Heart rate fell more quickly over the first two minutes” is a description of the data. “The intervention improved cardiovascular fitness” is a wider causal claim and needs an appropriate experimental design and sufficient evidence. A careful response states the conclusion at the level the study permits.

The individual scientific investigation (IA)

The revised SEHS course requires an individual scientific investigation. The 2027 examiner instructions describe a similar investigation model across Biology, Chemistry, Physics and SEHS. The student chooses an appropriate topic, develops a question, uses a defensible method, analyses the results and evaluates the conclusion.

The student can collaborate or support peers in developing aspects of a methodology where the IB requirements permit it. However, each candidate’s investigation must remain individual in its variable design and unique data. Students cannot simply submit identical datasets and reports as if they had carried out separate investigations.

The current report has a maximum of 3,200 words. The teacher marks the work and the IB externally moderates it. The assessment places substantial emphasis on the conclusion and evaluation, so a student should not spend all their time describing the method and leave little room to analyse what the results actually mean.

A feasible question might investigate how one safe, measurable condition relates to a defined movement or physiological outcome. The school must approve methods, equipment and participant arrangements. Students should not conduct unsafe maximal exercise tests, collect sensitive health information without approval or expose participants to unnecessary risk.

How to design a manageable SEHS investigation

Start with a research question that identifies a variable, a measurable outcome and a realistic population or context. “Does exercise improve health?” is too broad. A school-based question should be narrow enough to investigate safely and accurately within the time and equipment available.

Next, identify the variables and the method. What will be measured? How often? Which factors should be kept similar? Is the equipment sufficiently reliable? Is the method safe for the participants? The learner should consider whether a small change in the measured outcome can be distinguished from normal variation or measurement uncertainty.

Plan how to record and analyse the data before collecting it. If the method produces numbers that cannot answer the research question, revise the question or method. Do not collect a large dataset simply because more rows look impressive.

Finally, evaluate the limitations. A small convenience sample may not represent trained athletes or the wider population. A single session may show immediate response but not long-term adaptation. A good conclusion recognises these limits instead of claiming more than the investigation establishes.

The collaborative sciences project

The revised science programme includes an interdisciplinary collaborative sciences project. Students can work with learners studying other DP science subjects to investigate a real-world problem that benefits from more than one scientific perspective.

A project on urban heat and physical activity, for example, might combine SEHS knowledge about heat stress and exercise with Physics concepts about energy transfer and Biology concepts about body responses. The aim is to integrate ideas, evaluate complexity and consider possible solutions rather than produce several unrelated subject reports.

The project supports communication, negotiation, team-building and collective problem-solving. It should not be mistaken for the individual SEHS scientific investigation or treated as a substitute for the candidate’s own IA data and report.

Is IB SEHS the same as Singapore SEC Exercise and Sports Science?

No. The IB Diploma Programme SEHS subject is a science course for pre-university learners, normally around ages 16–19. Singapore’s SEC Exercise and Sports Science (ESS) is a separate national syllabus with its own code, course design, coursework, assessment dates and award arrangements.

The two courses may share words such as exercise, movement, health, training and sports science, but this does not make the assessment interchangeable. A student’s SEC coursework log cannot simply be submitted as an IB SEHS scientific investigation, and an IB paper structure should not be used as a guide to the SEC examination.

Families should identify the qualification provider, candidate year and exact subject title before looking for a syllabus or hiring subject support. For Singapore national examinations, use the relevant MOE and SEAB SEC documentation. For the IB Diploma, use the IB SEHS guide and the school coordinator’s assessment instructions.

Which university pathways can SEHS support?

SEHS can be relevant to higher education in sport and exercise science, sports performance, exercise physiology, movement science, health promotion, biomechanics and related areas. It can also offer useful scientific preparation for students interested in physical activity and health research.

However, individual degrees set their own entry requirements. A university may require Biology, Chemistry, Physics or Mathematics at a specified level. Some clinical or regulated healthcare pathways have very specific prerequisites that SEHS does not replace. Students interested in medicine in Singapore should check the published Chemistry HL plus Biology or Physics HL requirements separately.

Work backwards from actual courses. Identify three possible degrees, inspect their current IB requirements and then choose an available subject combination that keeps those options realistic. Do not select SEHS HL because it sounds directly related to sport if the intended programme requires a different named science.

How to study SEHS effectively

SEHS revision should combine accurate scientific knowledge with practical interpretation. For each topic, students can explain the mechanism in their own words, draw a simple model, identify a relevant measurement and interpret an unfamiliar example. This tests whether they understand the process rather than merely recognise a term.

Create separate practice for physiology, nutrition, biomechanics and psychology, then deliberately combine the areas. A real performance question may require a learner to interpret body responses and a movement pattern together. Students should practise explaining what is known, what is hypothesised and what evidence is missing.

Use the investigation as a learning process, not just a final report deadline. Discuss the research question with the teacher, test feasibility, check safety and refine the method before data collection. If tuition is considered, diagnose whether the student needs help with biological concepts, mechanics, statistics, graph analysis or scientific writing.

A practical checklist for parents and students

Before selecting SEHS, ask whether the school teaches it at SL, HL or both, what practical facilities are available and how students are supported in learning scientific investigation. Ask how the collaborative sciences project is organised and how much time is expected for data collection and report writing.

Check the exact university courses the student may want to enter. Confirm whether SEHS is accepted as a general science, whether a named Biology or Chemistry subject is required and what Mathematics level is expected. Finally, compare the workload with the rest of the six-subject Diploma and core.

A good subject choice supports both the student’s interests and a credible next step. An active student may enjoy learning why movement works, while a student who prefers theoretical science may find the practical and applied aspects especially valuable. Both need disciplined evidence and careful reasoning.

SEHS parent and student checklist

  • Confirm the school offers the revised IB SEHS course at the intended SL or HL level.
  • Use the course first assessed in May 2026, not an old option-topic guide.
  • Understand all three themes and how physiology, mechanics and psychology interact.
  • Practise Paper 1A concept questions, Paper 1B data analysis and Paper 2 written responses.
  • Plan a safe, feasible research question and check the IA method with the teacher.
  • Keep individual investigation variables and data unique, even when peer collaboration is permitted.
  • Use consent, privacy and appropriate safety safeguards for any participant-based work.
  • Distinguish the IB course from Singapore’s SEC Exercise and Sports Science syllabus.
  • Check the exact university degree prerequisites for named sciences and Mathematics.
  • Balance practical work and the investigation with other DP subjects, EE, TOK and CAS.

Frequently asked questions

Is IB SEHS a science subject?

Yes. It is an experimental science in the IB Diploma Programme.

How many hours are recommended for SEHS HL and SL?

The IB recommends 240 hours for HL and 150 hours for SL.

When was the current SEHS syllabus first assessed?

The revised course was first assessed in May 2026, so it applies to 2027 planning.

Does IB SEHS have Paper 3?

The revised course has two external papers: Paper 1A/1B and Paper 2.

How much is the SEHS individual investigation worth?

The 2027 IB examiner instructions state 24% of the overall subject grade.

Can students share data for the SEHS IA?

Students may collaborate on aspects of methodology where permitted, but each investigation must retain its own independent/dependent-variable design and unique data.

Is SEHS the same as Singapore SEC Exercise and Sports Science?

No. They are different qualifications with separate syllabuses and assessment systems.

Can SEHS replace Biology for a university course?

Only where the university accepts it for the specific course. Named science prerequisites must be checked directly.

Is playing sport enough to do well in SEHS?

No. Students must understand scientific mechanisms, investigate safely and analyse data.

Does SEHS include nutrition and sports psychology?

Yes. The current course includes exercise physiology and nutrition, biomechanics, and sports psychology and motor learning.

Reviewed 7 November 2026. Course themes reflect the revised SEHS syllabus first assessed in May 2026. The 24% IA weighting is drawn from the IB’s 2027 examiner instructions. Schools and university programmes may have additional requirements. eduKateSG is an independent educational publisher.

These subjects develop different kinds of creative, scientific and critical thinking. Compare their actual syllabus versions, assessment requirements and the student’s future course prerequisites before choosing an HL or SL combination.