{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate&page=2",
    "query": {
      "intervention": "Heart Rate",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Heart+Rate&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-12T03:49:34.906Z",
  "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": "NCT04307212",
      "title": "How Exercise Signals Health Responses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Overweight"
      ],
      "interventions": [
        {
          "name": "50% heart rate reserve (HRR) low intensity exercise",
          "type": "OTHER"
        },
        {
          "name": "75% HRR moderate intensity exercise",
          "type": "OTHER"
        },
        {
          "name": "Control no exercise",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "USDA Grand Forks Human Nutrition Research Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "18 Years to 50 Years"
      },
      "enrollment_count": 41,
      "start_date": "2020-01-10",
      "completion_date": "2023-09-12",
      "has_results": false,
      "last_update_posted_date": "2025-04-11",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Grand Forks, North Dakota",
      "locations": [
        {
          "city": "Grand Forks",
          "state": "North Dakota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04307212"
    },
    {
      "nct_id": "NCT00665769",
      "title": "Physiological Disturbances Associated With Neonatal Intraventricular Hemorrhage",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Intraventricular Hemorrhage",
        "Autoregulation"
      ],
      "interventions": [
        {
          "name": "Hypercapnia",
          "type": "OTHER"
        },
        {
          "name": "Normocapnia",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Baylor College of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "1 Minute",
        "maximum_age": "7 Days",
        "sex": "ALL",
        "summary": "1 Minute to 7 Days"
      },
      "enrollment_count": 103,
      "start_date": "2008-06",
      "completion_date": "2015-11",
      "has_results": false,
      "last_update_posted_date": "2022-04-05",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Houston, Texas",
      "locations": [
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00665769"
    },
    {
      "nct_id": "NCT04854122",
      "title": "Blood Flow Regulation in Individuals With Down Syndrome - Training Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Down Syndrome"
      ],
      "interventions": [
        {
          "name": "Combined exercise intervention",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Usual care / Sham intervention",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Nevada, Las Vegas",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 60,
      "start_date": "2021-09-09",
      "completion_date": "2024-08-31",
      "has_results": true,
      "last_update_posted_date": "2026-02-04",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Las Vegas, Nevada",
      "locations": [
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04854122"
    },
    {
      "nct_id": "NCT00837902",
      "title": "Genetic Determinants of Response to Beta Blockade",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Atenolol (β-blocker)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vanderbilt University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 154,
      "start_date": "2009-01",
      "completion_date": "2014-12-31",
      "has_results": true,
      "last_update_posted_date": "2018-11-30",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Nashville, Tennessee",
      "locations": [
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00837902"
    },
    {
      "nct_id": "NCT01980979",
      "title": "Efficacy of Remodulin in Adults With Congenital Heart Disease (ACHD) and Pulmonary Hypertension",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Congenital Heart Disease"
      ],
      "interventions": [
        {
          "name": "Remodulin",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, Los Angeles",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2013-11",
      "completion_date": "2015-12",
      "has_results": false,
      "last_update_posted_date": "2017-09-21",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 2,
      "location_summary": "Los Angeles, California • Columbus, Ohio",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Columbus",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01980979"
    },
    {
      "nct_id": "NCT05958329",
      "title": "Short Sessions of HRV Biofeedback",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Resilience"
      ],
      "interventions": [
        {
          "name": "HRV Biofeedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Icahn School of Medicine at Mount Sinai",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 127,
      "start_date": "2021-07-01",
      "completion_date": "2022-07-15",
      "has_results": false,
      "last_update_posted_date": "2023-07-24",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05958329"
    },
    {
      "nct_id": "NCT07002437",
      "title": "Hypoxia Pathways for Early Recovery After Spinal Cord Injury",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spinal Cord Injuries (SCI)"
      ],
      "interventions": [
        {
          "name": "Augmented Acute Intermittent Hypoxia (aAIH)",
          "type": "OTHER"
        },
        {
          "name": "Acute Intermittent Hypercapnic-Hypoxia (AIHH)",
          "type": "OTHER"
        },
        {
          "name": "Sham AIH",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 18,
      "start_date": "2025-11-20",
      "completion_date": "2027-07",
      "has_results": false,
      "last_update_posted_date": "2025-12-03",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Jacksonville, Florida",
      "locations": [
        {
          "city": "Jacksonville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07002437"
    },
    {
      "nct_id": "NCT01313572",
      "title": "Study of the Safety and Efficacy of Apadenoson for Detection of Myocardial Perfusion Defects Using SPECT MPI",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Coronary Artery Disease"
      ],
      "interventions": [
        {
          "name": "Apadenoson SPECT-MPI",
          "type": "DRUG"
        },
        {
          "name": "Adenosine SPECT-MPI",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Forest Laboratories",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 197,
      "start_date": "2011-08",
      "completion_date": "2012-04",
      "has_results": false,
      "last_update_posted_date": "2012-05-01",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 45,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Beverly Hills, California + 37 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Beverly Hills",
          "state": "California"
        },
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01313572"
    },
    {
      "nct_id": "NCT03034629",
      "title": "Assessing the Stability of Transcranial Magnetic Stimulation Plasticity Responses",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Short-term aerobic exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Miami",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "70 Years",
        "sex": "ALL",
        "summary": "18 Years to 70 Years"
      },
      "enrollment_count": 16,
      "start_date": "2017-05-22",
      "completion_date": "2021-09-27",
      "has_results": false,
      "last_update_posted_date": "2021-12-07",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Miami, Florida",
      "locations": [
        {
          "city": "Miami",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03034629"
    },
    {
      "nct_id": "NCT04192136",
      "title": "NAD+ and Exercise in FA",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Friedreich Ataxia 1"
      ],
      "interventions": [
        {
          "name": "Nicotinamide Riboside",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Exercise Intervention",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "Children's Hospital of Philadelphia",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "10 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "10 Years to 40 Years"
      },
      "enrollment_count": 75,
      "start_date": "2020-09-03",
      "completion_date": "2025-10-31",
      "has_results": true,
      "last_update_posted_date": "2026-03-11",
      "last_synced_at": "2026-09-12T03:49:34.906Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04192136"
    }
  ]
}