Overview
A 7 in IB Sports, Exercise and Health Science (SEHS) comes from writing answers that hit the mark points examiners are actually looking for — precise anatomical and physiological terms, accurate reading of data, and extended responses that explain mechanisms rather than describe outcomes. It is a Group 4 experimental science, so it is marked like one: point-per-mark, rewarding exact terminology over vague understanding. This guide shows what the top grade takes, how the written papers and the scientific-investigation IA are assessed, and where the marks that separate a 5 from a 7 really sit. The syllabus was recently revised, so confirm the exact current paper structure in your IB subject guide and with your teacher.
What a 7 actually takes
Grade boundaries move slightly each session, so chasing a fixed percentage is the wrong target. What matters is thinking in mark points and markbands. Short-answer and data-based questions are marked point-per-mark — a three-mark question usually needs three distinct, correct ideas — while extended responses are placed against level descriptors. A single sharp sentence does not lift a vague answer into the top band; consistent, precise, well-linked biology does.
SEHS is genuinely interdisciplinary. You draw on anatomy and physiology, energy systems, biomechanics, skill acquisition and motor learning, nutrition, and sport and exercise psychology — the science of the human body in sport, exercise and health. A 7 candidate moves fluently between a named muscle action, an energy-system contribution, a biomechanical principle, and a psychological model, and applies each to the specific scenario in the question rather than reciting it generically. Learning to read IB markbands like an examiner is the highest-leverage habit in the subject.
How the assessment is marked
SEHS is assessed by external written papers plus a scientific-investigation Internal Assessment, the same style of IA as the other Group 4 sciences. The written papers generally combine three question types:
- Multiple-choice — quick recall and recognition of terms, structures, and relationships. Marks are lost here to careless reading, not lack of knowledge.
- Data-based and short-answer — you interpret graphs, tables, and experimental results, quote figures with units, describe trends precisely, and reason about the biology behind them.
- Extended-response — longer questions that reward structured, mechanism-level explanation and, where asked, evaluation and application.
HL covers additional topics and greater depth than SL and sits longer, more demanding papers with more extended-response demand. The exact number of papers, their durations, and their weightings changed in the recent revision, so check the current IB subject guide and your teacher rather than trusting an old past-paper front cover. Whatever the structure, the marking logic is the same: precise terms and applied reasoning score; vague paraphrase does not.
Winning the extended-response marks
Extended responses are where a 5 becomes a 7. The command term sets the task, so misreading *outline* as *explain*, or *explain* as *describe*, quietly caps your mark however much you write. Three habits pay off:
- Explain the mechanism, not just the outcome. "Oxygen gets to the muscle faster" is weak; the chain from increased ventilation and cardiac output to enhanced oxygen delivery and aerobic ATP resynthesis is what earns marks.
- Use named, precise terminology. Muscles, planes and axes of movement, energy pathways (ATP-PC, glycolytic, aerobic), and physiological variables should be named correctly. Point-per-mark marking rewards the exact term, not a gesture at it.
- Apply to the scenario. If the question describes a sprinter, a rehabilitating patient, or a specific exercise intensity, tie every point to that context.
Because command terms are load-bearing, study IB command terms explained so outline, describe, explain, analyse, and evaluate each trigger the right depth of answer.
Mastering data-based questions
SEHS papers lean heavily on data. You will read graphs and tables from exercise-physiology, biomechanics, and nutrition studies and be asked to describe, calculate, and interpret. To score reliably:
- Quote figures with units and reference the specific trend or turning point rather than saying "it goes up."
- Show working on any calculation — energy-system, biomechanics, or physiological calculations reward method as well as the final number, and correct units matter.
- Reason about the experiment — controls, reliability, and what the data does and does not show.
Drill these against past questions with a timer, then mark data points separately so you can see exactly where marks leak. Work syllabus-by-syllabus with topic practice so each point links to a lesson and a marking task.
The scientific-investigation IA
The IA is a Group 4 scientific investigation — a collaborative sciences project alongside your individual investigation — marked against the standard sciences criteria. It is a large, accessible block of marks that too many students leave late. Choose a focused, measurable research question with a variable you can genuinely control (a physiological, biomechanical, or performance measure works well), justify your method, handle uncertainties honestly, and evaluate limitations specifically rather than with generic filler. Start early and draft in stages. For the wider approach, see the [IB internal assessment complete guide](/blog/ib-internal-assessment-complete-guide).
Common mistakes that cap you at a 5
This section covers Common mistakes that cap you at a 5 — what IB examiners reward most often in past papers and coursework.
- Describing instead of explaining — outcomes without the mechanism stall in the middle bands.
- Vague terminology — "the muscle" instead of the named muscle; "energy" instead of the named energy system.
- Ignoring the data — answering from memory when the question hands you a graph to interpret.
- No units, no working on calculations — throwing away method and accuracy marks.
- Misreading the command term — writing a description when the task says explain or evaluate.
- Leaving the IA until late — losing easy, criterion-based marks to rushed work.
A weekly LEARN → PRACTICE → GET-MARKED study system
For the IB Diploma Programme, turn revision into a repeatable loop rather than passive rereading:
- LEARN — take one syllabus point, lock the named structures, the mechanism, and the key terms. Use the free SEHS SL course or HL course to work syllabus-by-syllabus.
- PRACTICE — do a timed past question on that point: a data-based item, a short-answer, or an extended response. Plan first, then write to time.
- GET-MARKED — mark it against the mark points, then get an answer marked for a criterion-aligned second opinion. Keep a log of your top three recurring errors and drill those first next week.
Run this cycle across every strand — anatomy and physiology, energy systems, biomechanics, skill acquisition, nutrition, and psychology — weighting the areas where your marking is weakest.
How MarkScheme helps
Because SEHS is graded point-per-mark, the fastest improvement comes from marking your answers the way an examiner would. After a past paper, extended response, or IA section, [get criterion-based feedback](/mark) mapped to IB assessment objectives — the same habit that lifts exam scripts also sharpens coursework drafts. Pair it with the free [SEHS SL](/ib/courses/sports-exercise-health-science-sl) and [HL](/ib/courses/sports-exercise-health-science-hl) courses, and browse everything from the [IB guides hub](/guides/ib).
Frequently asked questions
This section covers Frequently asked questions — what IB examiners reward most often in past papers and coursework.
Is a 7 harder at HL than SL?
The core skills — precise terminology, data analysis, mechanism-level explanation — are the same, but HL adds more content, greater depth, and more extended-response demand across longer papers. HL 7s need the same discipline applied to a larger, deeper body of material. Confirm the exact paper structure in your subject guide.
How much maths is there?
Some — energy-systems and biomechanics questions involve calculation — but it is light on heavy algebra. The bigger demands are precise recall and applied data interpretation. Show working and units and you will bank the quantitative marks.
How much does the IA count?
The scientific-investigation IA is a significant, criterion-marked block. Treat it as accessible marks, start early, and draft in stages rather than leaving it to the final term.
Why do I lose marks when I understood the topic?
Almost always because answers are vague or miss the command term. Mark schemes want distinct, specific points and the correct mechanism, in the right terminology. Practising point-per-mark answers fixes this.
Do I need to memorise every structure?
You need reliable recall of named structures, muscles, energy pathways, and key terms — then the ability to apply them to the scenario. Active recall plus applied practice beats passive rereading.