{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Rate+Recovery",
    "query": {
      "condition": "Heart Rate Recovery"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 15,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Heart+Rate+Recovery&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-06-26T23:04:17.826Z",
  "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": "NCT05622786",
      "title": "Effect of High-Intensity Gait Training Using a Treadmill on Locomotion Recovery in Traumatic Brain Injury Patients",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Traumatic Brain Injury",
        "Gait Disorders, Neurologic"
      ],
      "interventions": [
        {
          "name": "HIGT - physical rehab",
          "type": "OTHER"
        },
        {
          "name": "Low intensity physical therapy",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "Carilion Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 11,
      "start_date": "2022-10-07",
      "completion_date": "2023-06-15",
      "has_results": false,
      "last_update_posted_date": "2024-04-19",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Roanoke, Virginia",
      "locations": [
        {
          "city": "Roanoke",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05622786"
    },
    {
      "nct_id": "NCT05731856",
      "title": "Impact of Heart Rate Variability Modulation on Stress Management Among Physicians",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Burnout, Professional"
      ],
      "interventions": [
        {
          "name": "Apollo Wearable",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Michelle Thompson",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 50,
      "start_date": "2024-01-15",
      "completion_date": "2027-11",
      "has_results": false,
      "last_update_posted_date": "2026-02-18",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05731856"
    },
    {
      "nct_id": "NCT05454657",
      "title": "Heart Rate Variability Biofeedback for Substance Use Disorder: A Randomized Clinical Trial",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Substance Use Disorders"
      ],
      "interventions": [
        {
          "name": "Heart rate variability biofeedback + treatment as usual",
          "type": "DEVICE"
        },
        {
          "name": "Treatment as usual only",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2023-01-04",
      "completion_date": "2025-07-31",
      "has_results": true,
      "last_update_posted_date": "2025-12-26",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05454657"
    },
    {
      "nct_id": "NCT07356635",
      "title": "Cardiovascular Effects of Grieving",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Grief",
        "Cardiovascular Health",
        "Emotion"
      ],
      "interventions": [
        {
          "name": "Value-affirmation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of South Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 140,
      "start_date": "2025-10-16",
      "completion_date": "2027-03",
      "has_results": false,
      "last_update_posted_date": "2026-01-21",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Tampa, Florida",
      "locations": [
        {
          "city": "Tampa",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07356635"
    },
    {
      "nct_id": "NCT03380195",
      "title": "Effects of Watermelon Juice on Heart Rate Recovery and Post-exercise Muscle Soreness",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Heart Rate Recovery"
      ],
      "interventions": [
        {
          "name": "Watermelon juice",
          "type": "OTHER"
        },
        {
          "name": "Sport drink",
          "type": "OTHER"
        },
        {
          "name": "Sugar water",
          "type": "OTHER"
        },
        {
          "name": "Water",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "San Diego State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "50 Years",
        "sex": "ALL",
        "summary": "21 Years to 50 Years"
      },
      "enrollment_count": 27,
      "start_date": "2016-09-01",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-01-21",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "San Diego, California",
      "locations": [
        {
          "city": "San Diego",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03380195"
    },
    {
      "nct_id": "NCT07640685",
      "title": "UCLA Magnesium Formulation Athlete Study",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Athletic Performance",
        "Recovery",
        "Sleep"
      ],
      "interventions": [
        {
          "name": "Magnesium glycinate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Magnesium L-threonate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "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": 150,
      "start_date": "2026-07",
      "completion_date": "2027-06",
      "has_results": false,
      "last_update_posted_date": "2026-06-11",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07640685"
    },
    {
      "nct_id": "NCT07599475",
      "title": "Mobile Dual-Task Brain and Balance Intervention for Concussion Recovery",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Mild Traumatic Brain Injury (mTBI)",
        "Sports-related Concussion",
        "Heart Rate Variability (HRV)",
        "Walking",
        "Oculomotor",
        "Saliva",
        "Exosomal microRNA",
        "Cognitive Function"
      ],
      "interventions": [
        {
          "name": "Home-Based Mobile Dual-Task Intervention (BraW-Day™)",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Hyunhwa Lee",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 20,
      "start_date": "2026-05-15",
      "completion_date": "2027-04-30",
      "has_results": false,
      "last_update_posted_date": "2026-05-20",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Las Vegas, Nevada",
      "locations": [
        {
          "city": "Las Vegas",
          "state": "Nevada"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07599475"
    },
    {
      "nct_id": "NCT00844935",
      "title": "Electrocardiographic Autonomic Function Measures in Mechanically Ventilated Patients",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Disorders of the Autonomic Nervous System",
        "Cardiovascular Abnormalities",
        "Respiratory Disorders"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "University of California, San Francisco",
      "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": "2011-09",
      "completion_date": "2012-12",
      "has_results": false,
      "last_update_posted_date": "2012-03-28",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00844935"
    },
    {
      "nct_id": "NCT07361731",
      "title": "Evaluating the Feasibility, Acceptability, and Preliminary Outcomes of Heart Rate Variability Biofeedback for Individuals With Opioid Use Disorder.",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Autonomic Nervous System Imbalance",
        "Heart Rate Variability (HRV)",
        "Opioid Use Disorder",
        "Breathing Techniques",
        "Opioid Craving",
        "Recovery",
        "Emotional Regulation",
        "Positive and Negative Affect",
        "Stress",
        "Biofeedback"
      ],
      "interventions": [
        {
          "name": "Heart rate variability biofeedback",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "Arizona State University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 32,
      "start_date": "2025-12-01",
      "completion_date": "2026-02-01",
      "has_results": false,
      "last_update_posted_date": "2026-05-15",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Phoenix, Arizona",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07361731"
    },
    {
      "nct_id": "NCT07015047",
      "title": "Effects of Magnesium L-Threonate on Sleep, Recovery, and Athletic Performance in Collegiate Athletes",
      "overall_status": "ACTIVE_NOT_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Recovery of Function (G11.427.698.620)",
        "Athletic Performance",
        "Heart Rate Variability (HRV)"
      ],
      "interventions": [
        {
          "name": "Magnesium L-Threonate",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT",
        "OTHER"
      ],
      "sponsor": "University of California, Los Angeles",
      "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": 100,
      "start_date": "2025-10-01",
      "completion_date": "2026-07-15",
      "has_results": false,
      "last_update_posted_date": "2025-10-15",
      "last_synced_at": "2026-06-26T23:04:17.826Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07015047"
    }
  ]
}