Denne side blev automatisk oversat, og nøjagtigheden af ​​oversættelsen er ikke garanteret. Der henvises til engelsk version for en kildetekst.

Effects of Functional Electrical Stimulation on Metaboreflex Activation in Healthy Individuals

18. maj 2015 opdateret af: 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.

Studieoversigt

Status

Ukendt

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

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.

Undersøgelsestype

Interventionel

Tilmelding (Forventet)

20

Fase

  • Tidlig fase 1

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Brasilien
    • RS
      • Porto Alegre, RS, Brasilien, 90035-003
        • Rekruttering
        • Hospital de Clínicas de Porto Alegre
        • Ledende efterforsker:
          • Beatriz Schaan, PhD
        • Kontakt:

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

35 år til 70 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ja

Køn, der er berettiget til at studere

Alle

Beskrivelse

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

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Crossover opgave
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: 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.
Andet: Functional electric stimulation
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.
Andre navne:
  • FES
Placebo komparator: 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.
Andet: 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. 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.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Forearm and calf blood flow change
Tidsramme: 5 minutes of exercise ( when PECO-) or to fatigue (when PECO +)
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-).
5 minutes of exercise ( when PECO-) or to fatigue (when PECO +)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Maximum muscle strength
Tidsramme: The maximum peak strength will be measured 3 times with 1 minute interval between each measurement before a session of isometric exercise
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.
The maximum peak strength will be measured 3 times with 1 minute interval between each measurement before a session of isometric exercise
Peripheral vascular resistance
Tidsramme: It is calculated using data obtained from blood flow and mean arterial pressure in the protocols at 3 minutes in both PECO+ and PECO-
Ratio between the mean arterial pressure (MBP) and muscle blood flow.
It is calculated using data obtained from blood flow and mean arterial pressure in the protocols at 3 minutes in both PECO+ and PECO-

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Hospital de Clinicas de Porto Alegre

Efterforskere

  • Ledende efterforsker: Beatriz Dr Schaan, PhD, Hospital de Clínicas de Porto Alegre
  • Studiestol: Aline Macedo, Graduate, Federal University of Rio Grande do Sul

Publikationer og nyttige links

Den person, der er ansvarlig for at indtaste oplysninger om undersøgelsen, leverer frivilligt disse publikationer. Disse kan handle om alt relateret til undersøgelsen.

Generelle publikationer

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. marts 2015

Primær færdiggørelse (Forventet)

1. december 2015

Studieafslutning (Forventet)

1. marts 2016

Datoer for studieregistrering

Først indsendt

11. maj 2015

Først indsendt, der opfyldte QC-kriterier

14. maj 2015

Først opslået (Skøn)

19. maj 2015

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

20. maj 2015

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

18. maj 2015

Sidst verificeret

1. maj 2015

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • 14-0359

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

Kliniske forsøg med Reduction of Blood Flow

Kliniske forsøg med Functional electric stimulation

Søg i lignende forsøg

Sponsorer og samarbejdspartnere

Medicinske tilstande

Narkotikainterventioner

CROs by country

CROs in Zimbabwe

Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner