Sedentary Behavior, Cardiovascular Function, and Sleep (PACE)
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljeret beskrivelse
PRIMARY OBJECTIVES:
1. To test the hypothesis that two weeks of sedentary behavior will progressively impair vascular endothelial function.
2: To test the hypothesis that increasing sedentary behavior will decrease total sleep duration and sleep efficiency.
3: To test the hypothesis that two-weeks of sedentary behavior will progressively increase 24-h blood pressure and reduce nocturnal blood pressure dipping.
OUTLINE:
After a baseline period, participants will become more inactive and also come in for 4-h uninterrupted sitting visits. Cardiovascular, activity, and sleep measures will be taken throughout.
Undersøgelsestype
Undersøgelsestype
Tilmelding (Forventet)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiesteder
-
-
Oregon
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Portland, Oregon, Forenede Stater, 97239
- Rekruttering
- Oregon Institute of Occupational Health Sciences
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Kontakt:
- Saurabh Thosar, Dr.
- Telefonnummer: 503-494-2064
- E-mail: thosar@ohsu.edu
-
Ledende efterforsker:
- Saurabh Thosar, Dr.
-
-
Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
Inclusion Criteria:
- Ages 20-80y
- Lean and overweight (BMI 18.5-40 kg/m2)
- No acute, chronic, or debilitating medical conditions
- No prescription/non-prescription medications or drugs of abuse
- Limited weight training or intense exercise (swimming, CrossFit)
- Non-smoker
- Average level of daily physical activity (8,000-12,499 steps/day)
- Persons who fit all the above criteria and are suitable based on a medical history and health habits questionnaire, sleep profiling questionnaire, and electrocardiogram and clinical biochemical screening tests of blood and urine may be eligible to participate.
Exclusion Criteria:
- Persons with any acute, chronic, or debilitating medical condition except pre-hypertension and/or mild to moderate sleep apnea will be excluded.
- Persons with any symptoms of acute or active illness (e.g. fever, leukocytosis) will be excluded.
- Persons with a history of severe psychiatric illness or psychiatric disorders will be excluded.
- Persons with a history of regular night/or rotating shift work, or who have traveled more than three time zones during the one month prior to the study will be excluded.
- Pregnant persons, decisionally impaired adults, and prisoners will be excluded.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Andet
- Tildeling: N/A
- Interventionel model: Enkelt gruppeopgave
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
|---|---|
|
Andet: Sedentary to Active
Participants will visit the research laboratory for baseline measurements at visit 1 after wearing a pedometer for one week and maintaining their typical level of physical activity.
After the baseline visit, participants will reduce their step count by more than half for two weeks.
Participants will visit the laboratory once every week during the 2 week interventional period for a total of 3 visits.
|
Participants reduce their activity level to <5,000 steps/day and <50 % of baseline steps.
Andre navne:
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
|
Endothelial Function
Tidsramme: 3 weeks
|
Investigators will measure endothelial function as flow-mediated dilation at baseline, and each hour of the 3-hour sitting trials.
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3 weeks
|
|
Oxidative stress
Tidsramme: 3 weeks
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Oxidative stress will be measured using malondialdehyde adducts (MDA) from Ethylenediaminetetraacetic acid (EDTA) plasma.
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3 weeks
|
|
Endothelin-1
Tidsramme: 3 weeks
|
Endothelin 1 (ET-1) will be measured from Ethylenediaminetetraacetic acid (EDTA) plasma.
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3 weeks
|
|
Heart rate
Tidsramme: 3 weeks
|
During the weekly trials, heart rate will be measured as beats per minute while participants are in a seated position during the prolonged sitting period.
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3 weeks
|
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Blood pressure
Tidsramme: 3 weeks
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During the weekly trials, blood pressure will be measured as systolic over diastolic in a seated position in the dominant arm
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3 weeks
|
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24-hour BP measurement
Tidsramme: 3 weeks
|
Investigators will measure 24-hour ambulatory blood pressure monitoring (AMBP, Spacelabs, Inc) at baseline and for 24-h before each in-lab visit.
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3 weeks
|
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Sleep duration
Tidsramme: 3 weeks
|
Sleep duration will be scored from the ActiGraph and correlated with the sleep and activity diary.
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3 weeks
|
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Sleep efficiency
Tidsramme: 3 weeks
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Sleep efficiency will be scored from the ActiGraph and correlated with the sleep and activity diary.
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3 weeks
|
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Activity
Tidsramme: 3 weeks
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Activity will be scored from the ActiGraph and correlated with the sleep and activity diary.
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3 weeks
|
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Activity Perception
Tidsramme: 3 weeks
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Activity perception will be measured before each prolonged sitting trial using an Activity Perception questionnaire (Perception of Current Activity Questionnaire).
The questionnaire has 7 questions with answers ranging from 1 to 5. The range of scores is from 7 to 35, with 7 suggesting a strong negative perception of current activity, and 35 suggesting a strong positive perception of current activity.
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3 weeks
|
Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Saurabh Thosar, Dr., Oregon Institute of Occupational Health Sciences
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Forventet)
Primær færdiggørelse
Studieafslutning (Forventet)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- STUDY00020458
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
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