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A Sports, Exercise and Health Science Extended Essay investigates a focused question about human performance, physiology, biomechanics or training adaptations.
The essay must apply scientific theory and evidence, supported by valid data, controlled methods and clear analysis.
An SEHS EE must:
investigate human performance, physiological response, or biomechanical behaviour
focus on variables that can be measured ethically and safely
use accepted SEHS theory such as energy systems, training principles, biomechanics or motor learning
collect or analyse reliable human performance data
apply methods appropriate for school level sport science investigations
interpret results using SEHS concepts and physiological reasoning
evaluate validity, limitations and the applied significance of findings
Your essay should feel grounded in sport science rather than general health, psychology or biology.
A strong topic is:
linked to a specific aspect of performance, physiology, biomechanics or training
supported by measurable and ethical testing methods
appropriate for school facilities and safety requirements
grounded in SEHS theory rather than clinical or medical science
able to generate sufficient data for meaningful comparison
Examples of suitable topic types
effects of different training intensities on a measurable performance indicator
comparison of flexibility, strength or power across conditions
impact of recovery strategies on muscle fatigue
biomechanical analysis of movement efficiency
responses of cardiovascular or respiratory systems during exercise
Examples of unsuitable topic types
clinical or medical studies outside SEHS scope
invasive procedures or unsafe testing
broad health or wellness questions with no measurable variables
projects relying on self-reported wellbeing rather than performance data
topics requiring specialised laboratory equipment
SEHS requires measurable human performance variables under safe, controlled conditions.
Your essay must draw upon human performance or physiological data, such as:
timing, speed, distance or power measurements
heart rate, ventilation rate or lactate data
strength, flexibility or reaction time assessments
movement or biomechanical recordings
reliable secondary datasets from sport science research
Avoid
subjective or self-reported wellbeing scores without measurement
online health information with unclear scientific basis
datasets lacking context, methodology or verification
data collected with inconsistent testing protocols
Evidence must be interpreted using SEHS principles, not simply described.
Your methods may include:
field-based performance testing with standardised protocols
laboratory-style tests available in school settings
ergometer, treadmill or cycle-based measurements
flexibility, strength or power tests validated in sport science
movement analysis using video or observational tools
interpretation of published sport science datasets
The method must be ethical, repeatable and matched to the research question.
SEHS analysis should:
process data using relevant calculations and comparisons
interpret physiological or biomechanical responses through SEHS theory
explain observed trends with reference to energy systems, training principles or movement mechanics
use graphs, tables and figures meaningfully
remain closely focused on the variable or performance factor in the research question
Analysis must show sport science understanding rather than simple reporting.
Evaluation may include:
reliability and standardisation of testing protocols
limitations of equipment accuracy
impact of participant variation or motivation
underlying assumptions in sport science models
ethical constraints shaping the investigation
extent to which conclusions can be generalised to broader populations
A strong SEHS EE explains what the findings mean for human performance or training.
Avoid these issues, as they frequently lead to weak outcomes:
topics that belong in Biology or Psychology rather than SEHS
unsafe or unethical data collection
insufficient or inconsistent performance data
testing protocols that are poorly standardised
projects relying on subjective responses rather than measurable variables
questions too broad to evaluate rigorously
dependence on equipment unavailable in a school environment
Here are high quality examples of SEHS research questions:
How does interval training intensity influence peak blood lactate concentration in adolescent athletes?
To what extent does dynamic stretching improve vertical jump height compared with static stretching?
How does cadence affect cycling power output at constant resistance?
To what extent does forefoot versus rearfoot striking alter ground contact time in recreational runners?
How does recovery duration influence sprint performance across repeated maximal efforts?
Each question is measurable, ethical and grounded in SEHS theory.
Please note, the subject reports and examples are based on the previous iteration of the Extended Essay.