- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT02894099
Cardiovascular Risk in Sedentary Elderly During Prolonged Sitting Time Versus Intermittent Sitting Time
2 settembre 2016 aggiornato da: Eduardo Ferriolli, University of Sao Paulo
Blood Glucose, Insulin Response and Inflammatory Markers in Sedentary Elderly During Prolonged Sitting Time Versus Intermittent Sitting Time
In adults, the sedentary behavior was related to cardiovascular risk markers, regardless of the level of physical activity (PA).
However, the interruption of prolonged sedentary time has shown positive results even when performed in breaks of low intensity and short duration of activity.
The aim of this study is to analyze the influence of a sedentary uninterrupted period, as well as different forms of breaks in sedentary time for the glycemic, insulin and inflammatory markers responses in older adults.
This is a controlled clinical trial to be conducted in older (≥ 65 years) and sedentary (<150 min / week of moderate to vigorous physical activity) people.
Those with BMI ≥ to 35.00 kg /m2; diabetic, on medication for glycemic control, or with absolute or relative contraindications to PA practice will not be included .
Participants will undergo four phases of intervention separated by an interval of 7 days: (1) Prolonged Sitting Time(PST), in which older people will stay for 5 hours seated; (2) Prolonged sitting with PA of light intensity and short duration (LiSd), time sitting is interrupted for PA bouts of 50-60% of the Heart Rate (HR)max; (3) Prolonged sitting with PA of moderate intensity and short duration (MiSd), time sitting will be interrupted for PA bouts of 65-75% predicted HR max; (4) Prolonged sitting with PA of moderate intensity and long duration (MiLd,) time sitting will be interrupted with PA bouts of 65-75% of HRmax.
PA bouts will be performed by walking into a hallway every 20 minutes of sitting time and will last 2 minutes, except in MiLd phase (10 minute breaks every 75 minutes).
To evaluate the effects of different PA interruptions in plasma glucose, serum insulin and inflammatory markers, blood samples will be collected serially (-30min, Baseline and 30min, 1h, 2h, 3h, 4h and 5h after a standardized meal.
It is expect that interruption of sedentary time, even with breaks of short duration and light intensity can bring benefits to cardiovascular risk markers even in the elderly.
Panoramica dello studio
Stato
Sconosciuto
Condizioni
Tipo di studio
Interventistico
Iscrizione (Anticipato)
16
Fase
- Non applicabile
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Luoghi di studio
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São Paulo
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Ribeirão Preto, São Paulo, Brasile, 14048-900
- Reclutamento
- Clinics Hospital of the Ribeirao Preto Medical School
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Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
65 anni e precedenti (Adulto più anziano)
Accetta volontari sani
Sì
Sessi ammissibili allo studio
Femmina
Descrizione
Inclusion Criteria:
- Sedentary older women according World Health Organization, defined as not performing moderate to vigorous physical activity and vigorous for 150 min / week for at least 3 months;
- BMI <to 35.00 kg / m2;
- Sign the Informed Consent.
Exclusion Criteria:
- Previous diagnosis of Diabetes Mellitus;
- Use of any medication for glycemic control;
- Orthopedic problems that impair walking or use of orthoses for walking.
- Relative or absolute contraindications to perform physical activity.
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Prolonged Sitting Time (PST)
Uninterrupted sitting time of 5 hours
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Volunteers will be continuously sitting on a chair for 5 hours and should move the least possible.
If the participant needs to stand from the chair, the stage will be invalidated.
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Sperimentale: PST+Light intensity Short bouts PA
Sitting prolonged interrupted with breaks of 2 minutes of light physical activity
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Volunteers will have their time sitting interrupted every 20 minutes for 2 minutes of physical activity of low intensity.
In the active period, participants will be encouraged to walk in the hallway and reach a training heart rate between 50-60% HR max predicted for the age and measured by heart rate monitor.
The Borg scale will be used at the beginning and the end of each active period in order to measure the subjective effort of the participants.
In the end the volunteers will be sitting 5 hours and have 30 minutes (15 bouts of 2 minutes) of light intensity physical activity.
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Sperimentale: PST+Moderate intensity Short bouts PA
Sitting prolonged interrupted with breaks of 2 minutes of moderate physical activity
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Volunteers will have their time sitting interrupted every 20 minutes for 2 minutes of physical activity of moderate intensity.
In the active period, participants will be encouraged to walk in the hallway and reach a training heart rate between 65 a 75% HR max predicted for the age and measured by heart rate monitor.
The Borg scale will be used at the beginning and the end of each active period in order to measure the subjective effort of the participants.
In the end the volunteers will be sitting 5 hours and have 30 minutes (15 bouts of 2 minutes)of moderate intensity physical activity.
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Sperimentale: PST+Moderate intensity Long bouts PA
Sitting prolonged interrupted with breaks of 10 minutes of moderate physical activity
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Volunteers will have their time sitting interrupted every 75 minutes for 10 minutes of physical activity of moderate intensity.
In the active period, participants will be encouraged to walk in the hallway and reach a training heart rate between 65 a 75% HR max predicted for the age and measured by heart rate monitor.
The Borg scale will be used at the beginning and the end of each active period in order to measure the subjective effort of the participants.
In the end the volunteers will be sitting 5 hours and have 30 minutes (3 bouts of 10 minutes) of moderate intensity physical activity.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Change in blood glucose area under curve during 5 hours in four different phases of intervention
Lasso di tempo: 4 weeks
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Assessed by serial blood sampling.The first blood sampling is performed 30 minutes before ingestion of a standard meal mixed solution composed of carbohydrate, fat and protein.
The collection of serial blood will be collected in time (-30min, Baseline, 30min, 1h, 2h, 3h, 4h and 5h after the meal).
The results will be expressed in mg.dl.
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4 weeks
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Change in insulin area under curve during 5 hours in four different phases of intervention
Lasso di tempo: 4 weeks
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Assessed by serial blood sampling.
The first blood sampling is performed 30 minutes before ingestion of a standard meal mixed solution composed of carbohydrate, fat and protein.
The collection of serial blood will be collected in time (-30min, Baseline, 30min, 1h, 2h, 3h, 4h and 5h after the meal).The results will be expressed in µIU/ml.
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4 weeks
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Assessment of physical performance
Lasso di tempo: 1 day
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The physical performance will be evaluated by the Short Physical Performance Battery test.
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1 day
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Assessment of handgrip strength
Lasso di tempo: 1 day
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Measure of handgrip strength with a manual dynamometer (Saehan)
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1 day
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Assessment of muscle strength of knee extensors
Lasso di tempo: 1 day
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Measure of muscle strength of the lower limbs (knee extension) with a isokinetic dynamometer (Biodex 4 Pro)
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1 day
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Physical Activity behaviour
Lasso di tempo: 7 days
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use of a tri-axial accelerometer to measure profile of spontaneous physical activity
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7 days
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Change in Inflammatory Cytokines area under curve during 5 hours in four different phases of intervention
Lasso di tempo: 4 weeks
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Assessed by serial blood sampling.
The first sampling is performed 30 minutes before ingestion of a standard meal mixed solution composed of carbohydrate, fat and protein.
The collection of serial blood will be collected in time (-30min, Baseline, 30min, 1h, 2h, 3h, 4h and 5h after the meal).
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4 weeks
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Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Investigatori
- Investigatore principale: Eduardo Ferriolli, PhD, USao Paulo
Pubblicazioni e link utili
La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.
Pubblicazioni generali
- Dunstan DW, Kingwell BA, Larsen R, Healy GN, Cerin E, Hamilton MT, Shaw JE, Bertovic DA, Zimmet PZ, Salmon J, Owen N. Breaking up prolonged sitting reduces postprandial glucose and insulin responses. Diabetes Care. 2012 May;35(5):976-83. doi: 10.2337/dc11-1931. Epub 2012 Feb 28.
- Chastin SF, Egerton T, Leask C, Stamatakis E. Meta-analysis of the relationship between breaks in sedentary behavior and cardiometabolic health. Obesity (Silver Spring). 2015 Sep;23(9):1800-10. doi: 10.1002/oby.21180.
- Benatti FB, Ried-Larsen M. The Effects of Breaking up Prolonged Sitting Time: A Review of Experimental Studies. Med Sci Sports Exerc. 2015 Oct;47(10):2053-61. doi: 10.1249/MSS.0000000000000654.
- Bailey DP, Locke CD. Breaking up prolonged sitting with light-intensity walking improves postprandial glycemia, but breaking up sitting with standing does not. J Sci Med Sport. 2015 May;18(3):294-8. doi: 10.1016/j.jsams.2014.03.008. Epub 2014 Mar 20.
- Bailey DP, Broom DR, Chrismas BC, Taylor L, Flynn E, Hough J. Breaking up prolonged sitting time with walking does not affect appetite or gut hormone concentrations but does induce an energy deficit and suppresses postprandial glycaemia in sedentary adults. Appl Physiol Nutr Metab. 2016 Mar;41(3):324-31. doi: 10.1139/apnm-2015-0462. Epub 2015 Dec 14.
- Dunstan DW, Wiesner G, Eakin EG, Neuhaus M, Owen N, LaMontagne AD, Moodie M, Winkler EA, Fjeldsoe BS, Lawler S, Healy GN. Reducing office workers' sitting time: rationale and study design for the Stand Up Victoria cluster randomized trial. BMC Public Health. 2013 Nov 9;13:1057. doi: 10.1186/1471-2458-13-1057.
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio
1 agosto 2015
Completamento primario (Anticipato)
1 dicembre 2016
Completamento dello studio (Anticipato)
1 dicembre 2016
Date di iscrizione allo studio
Primo inviato
26 luglio 2016
Primo inviato che soddisfa i criteri di controllo qualità
2 settembre 2016
Primo Inserito (Stima)
9 settembre 2016
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
9 settembre 2016
Ultimo aggiornamento inviato che soddisfa i criteri QC
2 settembre 2016
Ultimo verificato
1 agosto 2016
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- 1563/2015
Piano per i dati dei singoli partecipanti (IPD)
Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?
NO
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .
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