{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+rate+variability",
    "query": {
      "intervention": "Heart rate variability"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 288,
    "total_pages": 29,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+rate+variability&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-08T22:03:34.034Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT03458910",
      "title": "Heart Rate Variability and Emotion Regulation",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Rate Variability"
      ],
      "interventions": [
        {
          "name": "HRV training",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Southern California",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 193,
      "start_date": "2018-02-14",
      "completion_date": "2020-05-05",
      "has_results": true,
      "last_update_posted_date": "2025-07-23",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03458910"
    },
    {
      "nct_id": "NCT07350759",
      "title": "Observational Study Designed to Detect Decompensation of Congestive Heart Failure (dCHF) Using a Non-Invasive Wearable Device",
      "overall_status": "RECRUITING",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Decompensated Chronic Heart Failure"
      ],
      "interventions": [
        {
          "name": "wearable ring device with multiple embedded sensors to detect heart rate, SVO2, respiratory rate, heart rate variability and a number of other related physiologic parameters",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "CHFDX,Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2026-03-09",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-03-11",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 2,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        },
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07350759"
    },
    {
      "nct_id": "NCT04921228",
      "title": "Biofeedback for CHAMPS",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Disordered Eating",
        "Stress"
      ],
      "interventions": [
        {
          "name": "Heart rate variability biofeedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Villanova University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 25,
      "start_date": "2021-11-08",
      "completion_date": "2022-04-10",
      "has_results": false,
      "last_update_posted_date": "2022-06-28",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Villanova, Pennsylvania",
      "locations": [
        {
          "city": "Villanova",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04921228"
    },
    {
      "nct_id": "NCT00686283",
      "title": "Personalized Exercise for Adolescents With Diabetes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Diabetes"
      ],
      "interventions": [
        {
          "name": "PEP intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Arizona",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "12 Years",
        "maximum_age": "19 Years",
        "sex": "ALL",
        "summary": "12 Years to 19 Years"
      },
      "enrollment_count": 39,
      "start_date": "2007-08",
      "completion_date": "2010-07",
      "has_results": false,
      "last_update_posted_date": "2014-05-20",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Tucson, Arizona",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00686283"
    },
    {
      "nct_id": "NCT06425939",
      "title": "Exploring the Relationship Between Heart Rate Variability (HRV), Training Load, and Exercise Performance",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Rate Variability",
        "Exercise"
      ],
      "interventions": [
        {
          "name": "Force plate assessment",
          "type": "OTHER"
        },
        {
          "name": "Whoop wrist band",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DEVICE"
      ],
      "sponsor": "PepsiCo Global R&D",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "25 Years to 50 Years"
      },
      "enrollment_count": 49,
      "start_date": "2024-05-08",
      "completion_date": "2024-10-11",
      "has_results": false,
      "last_update_posted_date": "2026-04-21",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 2,
      "location_summary": "Chicago, Illinois • Frisco, Texas",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Frisco",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06425939"
    },
    {
      "nct_id": "NCT03077945",
      "title": "A Cognitive Behavioral Stress Intervention for Women Who Smoke",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Smoking, Cigarette",
        "Smoking Cessation",
        "Stress",
        "Stress, Emotional",
        "Stress Reaction"
      ],
      "interventions": [
        {
          "name": "heart rate variability biofeedback and cognitive reappraisal",
          "type": "BEHAVIORAL"
        },
        {
          "name": "control tasks",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Rutgers, The State University of New Jersey",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 70,
      "start_date": "2016-12-01",
      "completion_date": "2017-05-30",
      "has_results": false,
      "last_update_posted_date": "2018-03-14",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "New Brunswick, New Jersey",
      "locations": [
        {
          "city": "New Brunswick",
          "state": "New Jersey"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03077945"
    },
    {
      "nct_id": "NCT04301453",
      "title": "The Effect of Maternal Scent on Sleep Wake States",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Development, Infant"
      ],
      "interventions": [
        {
          "name": "Maternal Scent",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Columbia University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Weeks",
        "maximum_age": "36 Weeks",
        "sex": "ALL",
        "summary": "30 Weeks to 36 Weeks"
      },
      "enrollment_count": 78,
      "start_date": "2019-10-30",
      "completion_date": "2021-05-27",
      "has_results": false,
      "last_update_posted_date": "2022-08-26",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04301453"
    },
    {
      "nct_id": "NCT06829836",
      "title": "Can You Breathe Your Way To Better Health?",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Cancer",
        "Chronic Stress",
        "Autonomic Dysfunction"
      ],
      "interventions": [
        {
          "name": "Hight intensity interval training",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Cyclic Hyperventilation with Retention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Northern Colorado",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 36,
      "start_date": "2025-01-27",
      "completion_date": "2025-06-01",
      "has_results": false,
      "last_update_posted_date": "2025-04-25",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Greeley, Colorado",
      "locations": [
        {
          "city": "Greeley",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06829836"
    },
    {
      "nct_id": "NCT05401903",
      "title": "Relationship Between Chiropractic Care and Autonomic Nervous System Regulation",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Chiropractic Maintenance Care and Heart Rate Variability"
      ],
      "interventions": [
        {
          "name": "Chiropractic Maintenance Care",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Northeast College of Health Sciences",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "MALE",
        "summary": "18 Years to 40 Years · Male only"
      },
      "enrollment_count": 10,
      "start_date": "2022-06-01",
      "completion_date": "2023-05-31",
      "has_results": false,
      "last_update_posted_date": "2023-11-18",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Seneca Falls, New York",
      "locations": [
        {
          "city": "Seneca Falls",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05401903"
    },
    {
      "nct_id": "NCT07783061",
      "title": "Reducing Cardiovascular Risks: The Role of Alcohol Use",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Alcohol Drinking",
        "Drinking Behavior",
        "At-risk Drinking",
        "Cardiovascular Risk Factor",
        "High Blood Pressure"
      ],
      "interventions": [
        {
          "name": "Alcohol Abstinence",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Control arm",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL",
        "OTHER"
      ],
      "sponsor": "The University of Texas at Arlington",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "26 Years",
        "maximum_age": "49 Years",
        "sex": "ALL",
        "summary": "26 Years to 49 Years"
      },
      "enrollment_count": 148,
      "start_date": "2026-10",
      "completion_date": "2031-09",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-09-08T22:03:34.034Z",
      "location_count": 1,
      "location_summary": "Arlington, Texas",
      "locations": [
        {
          "city": "Arlington",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07783061"
    }
  ]
}