Effects of Five Days of Physical Inactivity on Endothelial Function in Healthy Humans
4. februar 2022 opdateret af: Moira Taylor, University of Nottingham
Physical inactivity is a significant predictor of major non-communicable diseases such as type 2 diabetes (7%), cardiovascular disease (6%), musculoskeletal disorders and some types of cancer, and has been proposed to be the 4th leading cause of death worldwide.
The investigators aim is to assess the vascular (endothelial) function before and after a 5-day period of reduced activity of upper and lower limbs via an arm sling and daily step counts reduction, respectively, in healthy participants.
Twelve young (ages of 18 - 35 years), healthy, males and females, recreationally active with a body mass index between 18 and 27 kg/m2 will be recruited.
The participants will then randomly undergo two 5-day interventions: (A) 5 consecutive days of habitual daily levels of physical activity and matched food intake (Control trial).
(B) 5 consecutive days of reduced step count by 80% compared to the Control trial combined with their non-dominant arm placed in a sling and a reduction in food (energy) intake (~20%) to match the reduction in energy expenditure induced by inactivity (Inactivity trial).
On days 1 and 6 of each experimental trial, the endothelial function of the brachial and popliteal arteries, and hand grip strength will be measured.
Studieoversigt
Undersøgelsestype
Interventionel
Tilmelding (Faktiske)
8
Fase
- Ikke anvendelig
Kontakter og lokationer
Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.
Studiesteder
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Nottinghamshire
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Nottingham, Nottinghamshire, Det Forenede Kongerige, NG7 2RD
- The University of Nottingham
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Deltagelseskriterier
Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.
Berettigelseskriterier
Aldre berettiget til at studere
18 år til 35 år (Voksen)
Tager imod sunde frivillige
Ingen
Køn, der er berettiget til at studere
Han
Beskrivelse
Inclusion Criteria:
- Non-smoking
- Males
- Age (18-35 years old)
- Body mass index (BMI) of 18-27 kg/m2
- Recreationally active
- Ability to give informed consent
Exclusion Criteria:
- Smoking
- Any metabolic (e.g. diabetes), endocrine (e.g. hyperthyroidism) or cardiovascular (e.g. heart or blood) abnormalities including hypertension or heart failure
- Clinically significant abnormalities on screening including ECG abnormalities
- Taking routine medication that may alter cardiovascular function and blood flow (e.g. blood pressure-lowering drugs or drugs that cause hypertension)
- Well-trained individuals
- On an energy-restricted diet or seeking to lose weight
- High alcohol consumption (<3-4 units/day)
Studieplan
Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Diagnostisk
- Tildeling: Randomiseret
- Interventionel model: Crossover opgave
- Maskning: Ingen (Åben etiket)
Våben og indgreb
Deltagergruppe / Arm |
Intervention / Behandling |
|---|---|
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Ingen indgriben: Control
5 consecutive days of normal daily levels of physical activity and matched food intake
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Eksperimentel: Inactivity
5 consecutive days of reduced step count by 80% compared to the Control trial, whilst placing the non-dominant arm in a sling, and reduced food intake (~ 20%) to match the reduction in energy expenditure induced by inactivity
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On days 1 and 6 of each main trial, the participants will be asked to attend the laboratory after an overnight fast of at least 8 to 12h to undergo brachial and popliteal arteries FMD measurements (30 min apart) using duplex-Doppler ultrasound, followed by assessment of the hand grip strength of their non-dominant hand using a hand dynamometer.
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Hvad måler undersøgelsen?
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Change from baseline of flow-mediated vasodilatation (FMD) of the brachial artery
Tidsramme: Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
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The FMD of the brachial artery will be measured using an ultrasound collected at baseline and continuously for 80 seconds post-arm occlusion for 5 minutes
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Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
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Change from baseline of flow-mediated vasodilatation (FMD) of the popliteal artery
Tidsramme: Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
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The FMD of the popliteal artery will be measured using an ultrasound collected at baseline and continuously for 80 seconds post-arm occlusion for 5 minutes
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Over 6 minutes and 20 seconds on day 1 and day 6 of each study arm
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Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Hand grip strength
Tidsramme: 3 minutes
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The hand grip strength will be measured using a hand dynamometer.
Three maximum hand grips separated by one minute rest at the end of each visit.
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3 minutes
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Samarbejdspartnere og efterforskere
Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.
Sponsor
Datoer for undersøgelser
Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.
Studer store datoer
Studiestart (Faktiske)
1. november 2018
Primær færdiggørelse (Faktiske)
1. marts 2020
Studieafslutning (Faktiske)
1. marts 2020
Datoer for studieregistrering
Først indsendt
19. november 2019
Først indsendt, der opfyldte QC-kriterier
12. december 2019
Først opslået (Faktiske)
16. december 2019
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
23. februar 2022
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
4. februar 2022
Sidst verificeret
1. februar 2022
Mere information
Begreber relateret til denne undersøgelse
Andre undersøgelses-id-numre
- A90355
Plan for individuelle deltagerdata (IPD)
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