Sedentary Behavior, Cardiovascular Function, and Sleep (PACE)
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
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.
Studientyp
Studientyp
Einschreibung (Voraussichtlich)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Oregon
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Portland, Oregon, Vereinigte Staaten, 97239
- Rekrutierung
- Oregon Institute of Occupational Health Sciences
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Kontakt:
- Saurabh Thosar, Dr.
- Telefonnummer: 503-494-2064
- E-Mail: thosar@ohsu.edu
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Hauptermittler:
- Saurabh Thosar, Dr.
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
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.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Sonstiges
- Zuteilung: N / A
- Interventionsmodell: Einzelgruppenzuweisung
- Maskierung: Keine (Offenes Etikett)
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
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Sonstiges: 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.
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Participants reduce their activity level to <5,000 steps/day and <50 % of baseline steps.
Andere Namen:
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Endothelial Function
Zeitfenster: 3 weeks
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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
|
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Oxidative stress
Zeitfenster: 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
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Endothelin-1
Zeitfenster: 3 weeks
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Endothelin 1 (ET-1) will be measured from Ethylenediaminetetraacetic acid (EDTA) plasma.
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3 weeks
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Heart rate
Zeitfenster: 3 weeks
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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
Zeitfenster: 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
Zeitfenster: 3 weeks
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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
Zeitfenster: 3 weeks
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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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Saurabh Thosar, Dr., Oregon Institute of Occupational Health Sciences
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Voraussichtlich)
Primärer Abschluss
Studienabschluss (Voraussichtlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- STUDY00020458
Plan für individuelle Teilnehmerdaten (IPD)
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Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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