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Effect of Isometric Handgrip Exercise on Blood Pressure in Pregnant Women (GRIP4HEALTH)

21. Mai 2026 aktualisiert von: Carina Enea, University of Poitiers

Effect of Isometric Handgrip Exercise on Cardiovascular and Cognitive Responses in Normotensive and Hypertensive Pregnant Women (GRIP4HEALTH)

Hypertension during pregnancy is a major public health concern, increasing the risk of cardiovascular complications for both the mother and the fetus. Women with chronic hypertension are at higher risk of adverse outcomes, and elevated blood pressure during pregnancy has also been associated with long-term cardiovascular and cognitive impairments.Regular physical activity is recognized as an effective non-pharmacological strategy to reduce blood pressure. Among different exercise modalities, isometric exercise has shown promising effects in lowering blood pressure in the general population, with minimal cardiovascular strain. However, its effects and safety in pregnant women, particularly those with hypertension, remain poorly understood.In addition to cardiovascular alterations, hypertension during pregnancy may also impact cognitive function, potentially through changes in cerebral perfusion and vascular function. Despite these associations, the combined cardiovascular and cognitive responses to exercise in this population have not been fully explored.This study aims to investigate the effects of isometric handgrip exercise on cardiovascular and cognitive responses in pregnant women with and without chronic hypertension, in order to better understand its potential as a safe and effective non-pharmacological intervention during pregnancy.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

Hypertension during pregnancy is a major public health concern associated with increased maternal and fetal morbidity, and long-term cardiovascular risk. Women with chronic hypertension are at higher risk of complications such as preeclampsia, preterm birth, and adverse neonatal outcomes. In addition, growing evidence suggests that hypertensive disorders of pregnancy may also be associated with long-term alterations in cardiovascular function and cognitive performance.During pregnancy, physiological changes in blood pressure regulation and vascular function may further complicate the management of hypertension. Pharmacological treatment options are limited due to potential risks for the fetus, highlighting the need for safe and effective non-pharmacological strategies.Physical exercise is recognized as an effective approach to reduce blood pressure and improve cardiovascular health in the general population. Among the different exercise modalities, isometric exercise has shown particularly promising effects in reducing blood pressure, with a low cardiovascular load. This modality may therefore represent an attractive option for pregnant women, as it can be performed safely with minimal physiological stress. However, despite these potential benefits, the effects and safety of isometric exercise during pregnancy, particularly in hypertensive women, remain poorly understood.In addition to cardiovascular alterations, hypertension during pregnancy may impact cognitive function, potentially through changes in cerebral perfusion and vascular regulation. Although physical activity has been associated with improvements in cognitive performance in the general population, the acute effects of exercise on cognitive function during pregnancy have not been well established.The aims of this study are:First, to evaluate the effect of isometric handgrip exercise on 24-hour blood pressure in pregnant women with and without chronic hypertension.Second, to compare cardiovascular responses to isometric exercise between normotensive and hypertensive pregnant women, including brachial and central blood pressure, arterial stiffness, and heart rate.Third, to examine differences in cognitive performance between normotensive and hypertensive pregnant women, and to explore the relationship between cardiovascular responses and cognitive outcomes.

Studientyp

Interventionell

Einschreibung (Geschätzt)

30

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studieren Sie die Kontaktsicherung

Studienorte

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene

Akzeptiert gesunde Freiwillige

Ja

Beschreibung

Inclusion Criteria:

  • Pregnant women covered by the French National Health Insurance system
  • Pregnant women who do not object to participation in the study
  • Women belonging to one of the following two groups:
  • Women with chronic hypertension present before pregnancy (diagnosed within the past 5 years), defined as systolic blood pressure (SBP) ≥ 140 mmHg or diastolic blood pressure (DBP) ≥ 90 mmHg, without antihypertensive treatment
  • Normotensive pregnant women, defined as systolic blood pressure (SBP) < 140 mmHg and diastolic blood pressure (DBP) < 90 mmHg before pregnancy

Exclusion Criteria:

  • Current treatment for chronic or gestational hypertension
  • Known cardiovascular disease other than chronic hypertension
  • Age under 18 years
  • Persons deprived of liberty
  • Inability to speak or adequately understand French
  • Persons hospitalized without consent who are not subject to legal protection measures, and persons admitted to a health or social institution for purposes other than research
  • Persons currently excluded from participation in another research study
  • Persons under judicial protection or guardianship Type 1 or type 2 diabetes
  • Severe or extreme obesity (BMI ≥ 40 kg/m²)
  • Thyroid disease
  • Heavy smoking

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Verhütung
  • Zuteilung: Zufällig
  • Interventionsmodell: Crossover-Aufgabe
  • Maskierung: Keine (Offenes Etikett)

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Sonstiges: Normotensive Pregnant Women
Pregnant women without chronic hypertension. Participants in this arm complete both the isometric handgrip exercise session and the control rest session in randomized order.
Verhalten: Isometric Handgrip Exercise
Isometric handgrip exercise performed at 30% of maximal voluntary contraction, consisting of four 2-minute contractions with one-minute rest intervals between efforts. The exercise is performed using a handgrip dynamometer.
Verhalten: Control Rest
Seated rest condition without exercise, used as a control comparison to the isometric handgrip intervention.
Sonstiges: Hypertensive Pregnant Women
Pregnant women with chronic untreated hypertension. Participants in this arm complete both the isometric handgrip exercise session and the control rest session in randomized order.
Verhalten: Isometric Handgrip Exercise
Isometric handgrip exercise performed at 30% of maximal voluntary contraction, consisting of four 2-minute contractions with one-minute rest intervals between efforts. The exercise is performed using a handgrip dynamometer.
Verhalten: Control Rest
Seated rest condition without exercise, used as a control comparison to the isometric handgrip intervention.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Systolischer und diastolischer Blutdruck (ambulante Blutdruckmessung)
Zeitfenster: Nach den Sitzungen (24 Stunden)
Hypotonie nach dem Training mit dem Mobil-O-Graph (mmHg).
Nach den Sitzungen (24 Stunden)

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Systolic and diastolic blood pressure (resting)
Zeitfenster: Before and after sessions (15 minutes)
Automated oscillometric tensiometer (mmHg)
Before and after sessions (15 minutes)
Central blood pressure
Zeitfenster: Baseline and post-intervention during sessions (30 minutes)
Central systolic and diastolic blood pressure assessed using pulse wave analysis derived from brachial oscillometric measurements.
Baseline and post-intervention during sessions (30 minutes)
Pulse wave velocity
Zeitfenster: Baseline
Arterial stiffness assessed by carotid-femoral pulse wave velocity using applanation tonometry. This measurement is performed at rest to characterize vascular health.
Baseline
Heart rate
Zeitfenster: Basline, before and after sessions (15 minutes)
Heart rate measured during each experimental session and recovery period using a heart rate monitor to assess cardiovascular response to the intervention.
Basline, before and after sessions (15 minutes)
Cognitive Performance
Zeitfenster: Baseline

Cognitive performance assessed at rest using a neuropsychological test battery including executive function, memory, attention, and processing speed tests. This outcome is used to compare cognitive function between normotensive and hypertensive pregnant women.

  • Stroop : higher scores indicate better executive function and inhibitory control. No universal minimum or maximum score.
  • Verbal Fluency Test: higher scores indicate better verbal executive functioning. No universal maximum score.
  • Rey Auditory Verbal Learning Test (RAVLT): Higher scores indicate better verbal learning and memory. Minimum score = 0; maximum score = 75.
  • Digit Span Test (forward and backward): higher scores indicate better working memory and attention. Minimum score = 0; No universal maximum score.
Baseline

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

University of Poitiers

Mitarbeiter

Poitiers University Hospital
Laboratory MOVE, Faculty of Sport Sciences, University of Poitiers, France

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

6. März 2026

Primärer Abschluss (Geschätzt)

31. August 2027

Studienabschluss (Geschätzt)

30. September 2027

Studienanmeldedaten

Zuerst eingereicht

6. Mai 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

21. Mai 2026

Zuerst gepostet (Tatsächlich)

26. Mai 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

26. Mai 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

21. Mai 2026

Zuletzt verifiziert

1. Mai 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Schlüsselwörter

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • 2025-A00590-49

Plan für individuelle Teilnehmerdaten (IPD)

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NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

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