Metabolic health markers (e.g., blood fats) can increase to unhealthy levels after eating meals high in fat or sugar – this is called postprandial lipaemia. Large cohort studies have shown that the magnitude and frequency of postprandial lipaemia is strongly related to cardiovascular disease risk; in fact, measuring postprandial lipaemia is a more sensitive marker of cardiovascular risk than fasting blood fat concentrations that are used traditionally by general practitioners. There is also consistent evidence showing that the initial signs of the deterioration in blood vessel health begins during adolescence with overt symptoms generally evident in adulthood. In some individuals this will lead to cardiometabolic diseases (diabetes, coronary heart disease). Early preventative approaches to cardiovascular health are warranted to reduce future risk because the initial deterioration in blood vessel health tracks from childhood into adulthood.
Numerous experimental research studies across the lifespan in the School of Sport, Exercise and Health Sciences show consistently that, on average, postprandial lipaemia is reduced by exercise completed up to 16 hours before eating fatty and sugary meals, compared with a non-exercise (control) condition. As with most physiological responses to exercise, there is considerable inter-individual variation in the exercised-induced lipaemic response. Whilst most adolescent and adult participants experience an anticipated reduction in lipaemia following prior exercise, a small but consistent proportion of every sample either have no meaningful change or even an increase in lipaemia, which we have not been able to explain to date.
Recent research has suggested apolipoprotein E (a protein that allows fats to be transported in tissues and used for energy), may be central to the inter-individual variation in postprandial lipaemic responses. A replicated cross-over design is required to address this question effectively across lifespan. This study will include measurement of Apo E alleles to determine whether there is a genetic foundation for the changes. This research proposal blends important health outcomes with opportunities for the doctoral researcher (PhD student) to utilise a wide variety of techniques and a unique research design for quantifying true intervention responses.
Supervisors
Primary supervisor: Dr Keith Tolfrey
Secondary supervisor: Dr Sarabjit Mastana
Entry requirements for United Kingdom
Essential:
- An upper second class degree (or equivalent) and/or MSc in appropriate subject such as Sport and Exercise Science; Physiology; Nutrition/Dietetics; Biochemistry; Biosciences; Human Biology or Molecular Biology.
Desirable:
- Experience or a working knowledge in the assessment of blood biomarkers
- Experience in conducting nutrition and exercise trials with human participants
- Experience or willingness to work with adolescents (would need to agree to DBS check)
- Excellent oral and written communication skills
- Ability to critically appraise scientific methodology and data analysis
- Ability to work well individually and as a member of a research team
Find out more about research degree funding
How to apply
All applications should be made online. Under programme name, select Sport, Exercise and Health Sciences. Please quote the advertised reference number: SSEHS/KT in your application.
To avoid delays in processing your application, please ensure that you submit the minimum supporting documents.
Apply now
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