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Clinical Trial Summary

Exercise benefits health through diverse metabolic processes and is central to healthy ageing. However, intense exercise also challenges the body, causing cellular damage that must be repaired. This means that we need to identify the level of exercise that can optimise health, and this level might potentially differ by age and sex. Our research aims to tackle this question, by studying the metabolic responses of the body both to exercise and during the subsequent recovery in 48 healthy and active participants between the ages of 8-10, 23-27 and 53-57. Participants will complete an inclusion questionnaire and, if eligible, be invited to visit the exercise laboratory 4-5-hours. We will collect questionnaire data and body measurements before participants undertake exercise on a treadmill. Biological samples (blood from adults only and saliva from everyone) will be collected at three time points (before, right after and one hour after exercise).


Clinical Trial Description

Before taking part, participants will be asked to complete an online inclusion questionnaire where the investigators will ask some questions about their health status, weight status, lifestyle, and medications to confirm that the participants are eligible and that it is safe for the participants to participate in the study. The investigators will record their consent electronically at this stage. If the participants are eligible and decide to take part in the study, the investigators will ask the participants to record their consent in writing before proceeding further. The in-person part of the study will take place at the University Of East London SportsDock (4-6 University Way, London E16 2RD) and last 4-5 hours. No breakfast or coffee/tea should be consumed on the day of the visit, but the investigators will offer the participants breakfast. The participants will also need to not have had any alcohol, recreational drugs, or exercise for 24 hours. On the day, the investigators will first measure their resting heart rate and blood pressure, collect body measurements (weight, height, waist circumference, hip circumference), and measure their body composition. The last thing the investigators will do before breakfast is to collect some samples. The investigators will collect two separate saliva samples using synthetic cotton swabs. After this, the investigators will collect a blood sample by venepuncture ("needle prick") from the adults only. This first part of the study will take 45-60 minutes. Along with breakfast, the investigators will ask the participants to consume a dose of deuterium-labelled water: an odourless, tasteless, and safe water that will allow us to measure their total body water content. The investigators will also ask the participants to complete two short questionnaires assessing their mood, appetite, feeling of tiredness as well as verbal learning. This part will take approximately 30 minutes. The researcher will then help the participants familiarise with the treadmill and associated equipment. The participants will wear a chest strap under their clothes and a special face mask which will be held in place by a head strap. These will measure their heart rate and everything the participants breathe in and out throughout the exercise challenge, respectively. The treadmill will start slowly to help the participants warm up and familiarise with the feeling of walking on it. After 2 minutes, the exercise challenge will begin. This will last for approximately 20 minutes, during which the treadmill will increase the speed and/or the incline every 2 minutes. It will feel like the participants are walking more briskly and more uphill, but it will not be too fast. The researcher will encourage the participants to complete the exercise challenge, as this will get the best response from their metabolism and give us the most accurate results. The participants will be able to stop the treadmill if the participants feel too exhausted to continue, feel faint or develop chest pain. Right after the participants complete the exercise challenge, the investigators will collect a saliva sample using a synthetic cotton swab and a blood sample by venepuncture (adults only). The investigators will then ask the participants to complete the same two short questionnaires as before. This part will take approximately 30 minutes. Finally, the researcher will allow the participants to relax and rest for about an hour. The investigators will then collect the last saliva samples using synthetic cotton swabs and blood samples by venepuncture (adults only). The participants will then complete the last iteration of the two short questionnaires. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06088108
Study type Interventional
Source University College, London
Contact Evelyn Maniaki, Dr
Phone +447481306193
Email evelyn.maniaki.20@ucl.ac.uk
Status Recruiting
Phase N/A
Start date April 1, 2023
Completion date January 31, 2024

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