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In line with the ever-growing aging of Western populations, the development of preventive strategies to slow down the effects of aging on cardiovascular health represents a major challenge in order to preserve functional capacities and a sufficient quality of life in the elderly. The alteration of vascular function (at the cerebral and systemic level) with aging is an important feature in the clinical picture including a decrease in physical and cognitive capacities. Although physical activity is recognized as an essential means of combating the effects of aging, optimizing its effects by defining the most effective strategies of practice remains a key objective. Offering alternative interventions to exercise training is also necessary for people who are unwilling or unable to engage in a physical activity program. In this context, hypoxic conditioning, alone or in conjunction with rehabilitative exercise training, is a new therapeutic modality with strong preclinical validity, in particular from a cardiovascular standpoint, and used in other pathologies to improve cardiovascular function and exercise performance and quality of life. Our aim is, therefore, to investigate the effect of hypoxic conditioning (alone or in conjunction with exercise training) on cerebrovascular health in the elderly.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Hypoxia - Rest | Experimental | Sessions of intermittent hypoxia at rest; 3 sessions/week; 8 weeks. To be compared with the placebo (normoxia) group at rest. |
|
| Normoxia - Rest | Placebo Comparator | Sessions of normoxia at rest; 3 sessions/week; 8 weeks. |
|
| Hypoxia - Exercise | Experimental | Sessions of exercise training under hypoxia; 3 sessions/week; 8 weeks. To be compared with the placebo (exercise under normoxia) group. |
|
| Normoxia - Exercise | Active Comparator | Sessions of exercise training under hypoxia; 3 sessions/week; 8 weeks. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Hypoxia and/or Exercise | Procedure | Hypoxia at rest versus normoxia at rest; Hypoxia during exercise versus Normoxia during exercise. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Middle cerebral artery flow velocity | Changes in middle cerebral artery flow velocity in response to hypercapnia (5% CO2) | Before intervention; right after intervention; 2 months after intervention |
| Measure | Description | Time Frame |
|---|---|---|
| Peak oxygen uptake | Peak oxygen uptake during a cardiopulmonary exercise test | Before intervention; right after intervention; 2 months after intervention |
| Flow-mediated dilation | Flow-mediated dilation in response to ischemia-reperfusion of the brachial artery |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Stéphane Doutreleau, MD, PhD | Contact | +33476767773 | sdoutreleau@chu-grenoble.fr | |
| Samuel Vergès, PhD | Contact | +33476766860 | sverges@chu-grenoble.fr |
| Name | Affiliation | Role |
|---|---|---|
| Stéphane Doutreleau, MD, PhD | CHU Grenoble Alpes, Grenoble Alpes University | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| CHU Grenoble Alpes | Recruiting | La Tronche | Auvergne-Rhône-Alpes | 38700 | France |
No plan at this point in time.
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| ID | Term |
|---|---|
| D000860 | Hypoxia |
| D002534 | Hypoxia, Brain |
| D001927 | Brain Diseases |
| D009043 | Motor Activity |
| D060825 | Cognitive Dysfunction |
| ID | Term |
|---|---|
| D012818 | Signs and Symptoms, Respiratory |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D002493 | Central Nervous System Diseases |
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Double-blind (participant and research team) study in relation to the gas being delivered (normoxic or hypoxic mixture) during intervention.
| Before intervention; right after intervention; 2 months after intervention |
| Blood pressure | 24h (systolic, diastolic and mean) blood pressure assessment | Before intervention; right after intervention; 2 months after intervention |
| Sleep | Sleep features assessed by polygraphy | Before intervention; right after intervention; 2 months after intervention |
| Cognitive function | Cognitive function assessed by the Montreal Cognitive Assessment questionnaire | Before intervention; right after intervention; 2 months after intervention |
| Health-related quality of life | Health-related quality of life assessed by the SF-36 questionnaire | Before intervention; right after intervention; 2 months after intervention |
| D009422 | Nervous System Diseases |
| D001519 | Behavior |
| D003072 | Cognition Disorders |
| D019965 | Neurocognitive Disorders |
| D001523 | Mental Disorders |