- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica NCT02448030
Effects of Functional Electrical Stimulation on Metaboreflex Activation in Healthy Individuals
18 maggio 2015 aggiornato da: Beatriz D'Agord Schaan, Hospital de Clinicas de Porto Alegre
Effects of Functional Electrical Stimulation Compared to Isometric Exercise on Metaboreflex Activation in Healthy Individuals: Randomized Crossover Clinical Trial
Cardiovascular exercise adjustments are required during in order to redistribute blood flow from non-exercising vascular areas to active muscles.
This hemodynamic adjustments, which are partially mediated by mechanosensitive and metabosensitive reflexes, ultimately increase oxygen and nutrient delivery to exercising muscle tissues (Mitchell, 1990).
Static handgrip exercise has been shown to induce alterations in the arterial baroreflex function (Kim, 2005) and activation of muscle metaboreflex that increases arterial blood pressure and peripheral vasoconstriction, respectively.
Functional electrical stimulation (FES) treatment used in physical therapy in patients who are unable to tolerate conventional exercise showed to be a good alternative for muscle strengthening (Sbruzzi, 2010) and to improve metabolic abnormalities (Karavidas, 2006).
However, the effect of FES on metaboreflex activation in healthy individuals has never been investigated.
Therefore, this study aims to evaluate the metaboreflex activation induced by FES in upper and low limbs in healthy individuals, and also to compare their results with the effects caused by isometric exercise.
Panoramica dello studio
Stato
Sconosciuto
Condizioni
Intervento / Trattamento
Descrizione dettagliata
All participants will be invited to attend four separate days for completion of the study protocols.
On the first day, the metaboreflex activation in upper limb will be randomly assigned to isometric exercise or FES intervention.
On the second day, at least two days apart, random isometric exercise or FES intervention will be performed in the upper limb.
On the third day, at least one week apart, all participants will be assigned to perform metaboreflex in a lower limb induced by isometric exercise or FES intervention.
On the fourth day, at least two days apart, random isometric exercise or FES intervention will be performed in a lower limb.
To evaluate the isometric exercise and FES intervention the post-exercise ischemia will be randomly performed to evaluate the accumulation of metabolites in response to activated limb (PECO +) and evaluation control without ischemia (PECO-).
The experiments between PECO+ and PECO- will be separated by a 30 min interval.
During isometric exercise and FES protocols the blood flow and peripheral vascular resistance will be assessed by venous occlusion plethysmography.
Fatigue will be determined every minute by the 10-point Borg scale to assess rate of perceived exertion and by blood lactate.
Blood lactate will be evaluated through capillary action at pre, immediately post exercise and at 5 minutes during the recovery period.
Hemodynamic variables such as BP and HR will be recorded every minute during the protocols.
Tipo di studio
Interventistico
Iscrizione (Anticipato)
20
Fase
- Prima fase 1
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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RS
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Porto Alegre, RS, Brasile, 90035-003
- Reclutamento
- Hospital de Clínicas de Porto Alegre
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Investigatore principale:
- Beatriz Schaan, PhD
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Contatto:
- Aline Macedo, Graduate
- Numero di telefono: +55 51 97016966
- Email: alinechagastelles@gmail.com
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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
Da 35 anni a 70 anni (Adulto, Adulto più anziano)
Accetta volontari sani
Sì
Sessi ammissibili allo studio
Tutto
Descrizione
Inclusion Criteria:
- Healthy individuals
- Both genders
- Aged 35-70 years
- Sedentary
- Not using continuous medications
Exclusion Criteria:
- Cardiovascular disease
- Neurological disease
- Malignant disease
- Peripheral vascular disorders (varicose veins or deep vein thrombosis)
- Peripheral sensitivity alterations
- Contraindication to performing physical exercise
- Refusal to sign the consent form
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
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione incrociata
- Mascheramento: Separare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
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Sperimentale: Functional electric stimulation
Other: The FES will be placed at the flexor muscles of the forearm and knee extensors, for evaluation of upper and lower limbs, respectively.
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The FES will be placed at the flexor muscles of the forearm and knee extensors, for evaluation of upper and lower limbs, respectively.
The stimulation frequency will be 20 Hz.
The pulse width used will be 0.5 milliseconds and the contraction time will be 60 seconds (TON: 60s) with a 1-second rest interval (TOFF: 1s).
The total time of application will be determined for the muscle fatigue that will be evaluated by 10-point Borg scale and by the measurement of lactate accumulation that must not exceed 30 minutes.
The intensity will be adjusted individually, taking into account the patient's ability to promote the full flexion of the wrist / knee extension and comfort during contractions.
Along with the application of FES a 1 Kg overload will be applied to intensify the fatigue time.
Altri nomi:
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Comparatore placebo: Isometric exercise
For the upper limbs the isometric contraction exercise with handgrip will be performed for 5 minutes with 30% of loading, previously measured by maximum voluntary contraction test.
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For the upper limbs the isometric contraction exercise with handgrip will be performed for 5 minutes with 30% of loading, previously measured by maximum voluntary contraction test.
For the lower limbs the knee extension exercise will be conducted in a training station.
The SBP, DBP, MBP and HR will be recorded through the protocols.
Fatigue will be determined every minute by the 10-point Borg scale and by measurement of lactate accumulation before, immediately after the protocol, and 5 minutes during the recovery period.
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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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Forearm and calf blood flow change
Lasso di tempo: 5 minutes of exercise ( when PECO-) or to fatigue (when PECO +)
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When performed the protocol with FES measurements will be taken for 3 minutes of rest (in both PECO+ and PECO-), 5 minutes of exercise (when PECO-) or to fatigue (when PECO +), during the 3 minutes of occlusion (when PECO +) and 3 minutes final recovery (in both PECO+ and PECO-).
When performed the protocol with isometric exercise measurements will be at 3 minutes basal (in both PECO+ and PECO-), 3 minutes of exercise (in both PECO+ and PECO-), 3 minutes of occlusion when PECO + and 3 minutes of ultimate recovery (in both PECO+ and PECO-).
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5 minutes of exercise ( when PECO-) or to fatigue (when PECO +)
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Maximum muscle strength
Lasso di tempo: The maximum peak strength will be measured 3 times with 1 minute interval between each measurement before a session of isometric exercise
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Before starting the evaluations of blood flow, the maximum peak strength is measured three times with 1 minute interval between each measurement, after is calculated 30% of the maximum value and the determined load exercise.
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The maximum peak strength will be measured 3 times with 1 minute interval between each measurement before a session of isometric exercise
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Peripheral vascular resistance
Lasso di tempo: It is calculated using data obtained from blood flow and mean arterial pressure in the protocols at 3 minutes in both PECO+ and PECO-
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Ratio between the mean arterial pressure (MBP) and muscle blood flow.
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It is calculated using data obtained from blood flow and mean arterial pressure in the protocols at 3 minutes in both PECO+ and PECO-
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Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Investigatori
- Investigatore principale: Beatriz Dr Schaan, PhD, Hospital de Clínicas de Porto Alegre
- Cattedra di studio: Aline Macedo, Graduate, Federal University of Rio Grande do Sul
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
- Sbruzzi G, Ribeiro RA, Schaan BD, Signori LU, Silva AM, Irigoyen MC, Plentz RD. Functional electrical stimulation in the treatment of patients with chronic heart failure: a meta-analysis of randomized controlled trials. Eur J Cardiovasc Prev Rehabil. 2010 Jun;17(3):254-60. doi: 10.1097/HJR.0b013e328339b5a2.
- Mitchell JH. J.B. Wolffe memorial lecture. Neural control of the circulation during exercise. Med Sci Sports Exerc. 1990 Apr;22(2):141-54. No abstract available.
- Rowell LB, O'Leary DS. Reflex control of the circulation during exercise: chemoreflexes and mechanoreflexes. J Appl Physiol (1985). 1990 Aug;69(2):407-18. doi: 10.1152/jappl.1990.69.2.407.
- Kim JK, Sala-Mercado JA, Rodriguez J, Scislo TJ, O'Leary DS. Arterial baroreflex alters strength and mechanisms of muscle metaboreflex during dynamic exercise. Am J Physiol Heart Circ Physiol. 2005 Mar;288(3):H1374-80. doi: 10.1152/ajpheart.01040.2004. Epub 2004 Nov 11.
- Karavidas AI, Raisakis KG, Parissis JT, Tsekoura DK, Adamopoulos S, Korres DA, Farmakis D, Zacharoulis A, Fotiadis I, Matsakas E, Zacharoulis A. Functional electrical stimulation improves endothelial function and reduces peripheral immune responses in patients with chronic heart failure. Eur J Cardiovasc Prev Rehabil. 2006 Aug;13(4):592-7. doi: 10.1097/01.hjr.0000219111.02544.ff.
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 marzo 2015
Completamento primario (Anticipato)
1 dicembre 2015
Completamento dello studio (Anticipato)
1 marzo 2016
Date di iscrizione allo studio
Primo inviato
11 maggio 2015
Primo inviato che soddisfa i criteri di controllo qualità
14 maggio 2015
Primo Inserito (Stima)
19 maggio 2015
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
20 maggio 2015
Ultimo aggiornamento inviato che soddisfa i criteri QC
18 maggio 2015
Ultimo verificato
1 maggio 2015
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- 14-0359
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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