Sedentary Behavior, Cardiovascular Function, and Sleep (PACE)
調査の概要
詳細な説明
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.
研究の種類
入学 (予想される)
段階
- 適用できない
連絡先と場所
研究場所
-
-
Oregon
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Portland、Oregon、アメリカ、97239
- 募集
- Oregon Institute of Occupational Health Sciences
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コンタクト:
- Saurabh Thosar, Dr.
- 電話番号:503-494-2064
- メール:thosar@ohsu.edu
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主任研究者:
- Saurabh Thosar, Dr.
-
-
参加基準
適格基準
就学可能な年齢
健康ボランティアの受け入れ
受講資格のある性別
説明
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.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:他の
- 割り当て:なし
- 介入モデル:単一グループの割り当て
- マスキング:なし(オープンラベル)
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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他の: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.
他の名前:
|
この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Endothelial Function
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
時間枠: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
|
協力者と研究者
捜査官
- 主任研究者:Saurabh Thosar, Dr.、Oregon Institute of Occupational Health Sciences
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (予想される)
研究の完了 (予想される)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。