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Clinical Research Directory

Browse clinical research sites, groups, and studies.

8 clinical studies listed.

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Cortisol

Tundra lists 8 Cortisol clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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NOT YET RECRUITING

NCT07510477

Effects of Breastfeeding, Virtual Reality, and Stress Ball on Pain, Anxiety, Cortisol Levels, and Comfort During Episiotomy Repair

The goal of this clinical trial is to learn about the effects of three different interventions-breastfeeding, using a stress ball, or wearing virtual reality (VR) goggles-on pain, anxiety, and stress during episiotomy repair (stitching) after childbirth. It also aims to examine how these methods affect a mother's comfort after the procedure. The main questions it aims to answer are: Does breastfeeding, using a stress ball, or using VR goggles lower the mother's pain and anxiety during the repair? Do these interventions reduce the mother's biological stress levels, measured by saliva cortisol tests? Do these methods lead to higher postpartum comfort levels for the mother in the first 24 hours after birth? Researcher will compare these three intervention groups to a "control group" (mothers receiving standard hospital care) to see which approach is most effective. Participants will: Be randomly assigned to one of four groups: Breastfeeding, VR Goggles, Stress Ball, or Standard Care. Use their assigned intervention throughout the entire episiotomy repair process. Provide saliva samples before and after the procedure to measure stress hormones (cortisol). Rate their pain and anxiety levels using clinical scales twice: once before the procedure begins and once immediately after it is finished. Complete a survey about their comfort levels between 6 and 24 hours after the delivery.

Gender: FEMALE

Ages: 18 Years - 45 Years

Updated: 2026-04-03

1 state

Episiotomy
Breastfeeding
Virtual Reality
+10
NOT YET RECRUITING

NCT07464860

Feasibility of Breathwork Intervention With Older Adults After Knee Surgery

Postoperative complications after surgical procedures, including following total knee arthroplasty (TKA), have a negative impact on the health and well-being of surgical patients. Older adults (≥65 years) are particularly vulnerable to postoperative complications and their associated morbidities due to the biological aging process. Older adults comprise nearly half of surgical patients worldwide, and this number is expected to increase in the next 10-20 years as the aging population continues to grow. TKA is the most common procedure undergone by older adults, and the rate of TKA procedures is also expected to rise. Despite perioperative guidelines and protocols to prevent postoperative complications, the prevalence of postoperative complications following TKA is approximately 12%. Given these statistics, millions of older adults undergoing TKA may be at risk for postoperative complications and their associated morbidities in the coming decades. Therefore, additional interventions are needed to combat postoperative complications in this population. The body's natural response to surgery, also known as the surgical stress response (SSR), contributes to postoperative complications through complex mechanisms involving the autonomic nervous system (ANS). Increased sympathetic nervous system (SNS) activity, or the body's fight-or-flight response, causes dysregulation in feedback systems that regulate the stress response, potentially leading to poorer outcomes. Interventions, such as breathwork, that induce the parasympathetic nervous system (PNS), or the body's rest-and-digest response, have been shown to balance the ANS, regulate stress biology, and improve outcomes. This study will examine the feasibility of adding a breathwork intervention (Box Breathing), compared to an attention control, to standard perioperative care for older adults undergoing TKA. This study will also examine the proof of concept that Box Breathing, compared to an attention control, may help regulate the SSR by assessing an objective measure of stress-related biology, diurnal cortisol rhythm, and gathering self-report information on pain, anxiety, depression, and quality of recovery following TKA.

Gender: All

Ages: 65 Years - Any

Updated: 2026-03-11

Surgical Stress Response
Stress Physiological
Stress Physiology
+11
NOT YET RECRUITING

NCT07401810

Facial Yoga in Menopausal Women

Purpose: The purpose of this study is to evaluate the effects of a structured facial yoga-based behavioral intervention on perceived stress, cognitive control, cognitive flexibility, and salivary cortisol levels in women during the menopausal period. The study aims to determine whether a non-pharmacological and non-invasive behavioral intervention can support psychological and cognitive functioning and reduce biological stress responses in menopausal women. Design: This study is designed as a randomized, controlled, pretest-posttest experimental trial with a post-intervention follow-up assessment. Eligible participants will be randomly assigned to either an intervention group or a control (usual care) group. Outcomes will be assessed at baseline, immediately after the intervention, and at follow-up to evaluate both the immediate and sustained effects of the intervention. Method: A total of 100 menopausal women aged 45-65 years will be recruited from a menopause outpatient clinic and randomly allocated to either the intervention group or the control group. The intervention group will participate in a 12-week online facial yoga program consisting of two 60-minute sessions per week. In this study, facial yoga refers to a non-pharmacological and non-invasive behavioral intervention focusing on facial myofascial relaxation, breathing regulation, and body awareness for stress regulation and cognitive functioning. The program will include facial myofascial relaxation techniques, basic yoga postures suitable for all physical levels, and structured breathing exercises. All sessions will be conducted online in a group format, and no audio or video recordings will be taken. The control group will continue to receive routine outpatient care during the study period and will be offered the facial yoga program after the completion of follow-up assessments, upon request. Data will be collected at three time points: at baseline prior to the intervention, immediately after completion of the 12-week intervention, and at 8 weeks following the intervention as a follow-up assessment. Perceived stress, cognitive control, and cognitive flexibility will be assessed using validated self-report questionnaires. Salivary cortisol samples will be collected under standardized morning conditions at each assessment point to evaluate biological stress response. Hypotheses: H1: Menopausal women participating in the facial yoga intervention will demonstrate a significant reduction in perceived stress levels compared to the control group at post-intervention and follow-up assessments. H2: Menopausal women participating in the facial yoga intervention will demonstrate a significant reduction in salivary cortisol levels compared to the control group at post-intervention and follow-up assessments. H3: Menopausal women participating in the facial yoga intervention will demonstrate a significant improvement in cognitive control and cognitive flexibility compared to the control group at post-intervention and follow-up assessments.

Gender: FEMALE

Ages: 45 Years - 65 Years

Updated: 2026-02-10

Menopause
Stress, Psychological
Cortisol
+6
RECRUITING

NCT07351799

Mindfulness and Meditation Based Lactation Education on Maternal Breastmilk in the Neonatal ICU

The purpose of this research is to investigate associations between mindfulness and meditation techniques and changes in maternal breastmilk in the mother pumping for her NICU infant.

Gender: FEMALE

Ages: 20 Years - Any

Updated: 2026-01-20

1 state

Lactation
Mindfulness
NICU
+8
RECRUITING

NCT07258433

Effects of PeptiSleep on Sleep Quality in Healthy Adults

Examining the effects of PeptiSleep, a plant-based sleep aid, on sleep quality in healthy adults

Gender: All

Ages: 18 Years - 65 Years

Updated: 2026-01-08

1 state

Sleep
Wearable Technology
Cortisol
+2
RECRUITING

NCT07319117

Evaluation of the Impact of a Nutritional Formulation on Cognitive Performance Following Stress Exposure.

The proposed project will evaluate the synergistic effects of a nutritional formulation, 'Think Tank' on cognitive performance following exposure to a psychological and physical stressor. Adopting a double-blind repeated measures cross-over design, middle-aged females (40-60 years) will be recruited to take part in a two-stage research study that will examine whether the formulation enhances cognitive performance and subjective well-being following the challenge of a stressor, compared to placebo. Cognitive assessments will examine the impact of the nutritional formulation on working memory, sustained attention, cognitive flexibility and inhibitory control. The study will also assess physiological (heart rate, blood pressure and cortisol) and subjective (well-being, anxiety, positive and negative mood, stress) markers of stress reactivity. The study will also explore levels sleep quality, mental and physical fatigue, effort, productivity, and perceived impact of the intervention.

Gender: FEMALE

Ages: 40 Years - 60 Years

Updated: 2026-01-06

1 state

Cognitive Assessment
Working Memory
Executive Function (Cognition)
+14
RECRUITING

NCT06687304

Light in Healthcare Environment (Ljus i sjukhusmiljö)

The goal of this clinical trial is to learn if light can enhance the feeling of well-being and sleep quality in Radiographers. It will also find out if there is an optimal recipe for light. The main questions it aims to answer are: * Will alertness, energy levels, and sleep quality increase in radiographers when the lighting is differed? * What light recipe is the most beneficial for the personnel? Researchers will compare no enhanced light environment to different enhanced light environment to see if the enhanced light is beneficial for radiographers. Participants will: * Will work in an enhanced light environment or a non-enhanced light environment * Answer surveys * Take saliva sample

Gender: All

Ages: 21 Years - Any

Updated: 2025-12-02

1 state

Sleep Quality
Well-being
Melatonin
+2
ACTIVE NOT RECRUITING

NCT04563676

Physiopathology and Sequelae of COVID-19 Infection

The data obtained from Covid-19 infections seem to suggest that the immunogenesis of Covid-19 could in some cases be the result of immune dysregulation. On the other hand, endocrine damage is possible at the tile of Covid-19 infection (mainly thyroid,adrenal, and hypothalamus). These disorders are autoimmune or linked to degeneration. The main objective is to assess the thyroid function (thyrotropic axis) as well as the corticotropic adrenal function of patients who have had Copvid-19 pneumonia. The secondary objectives is to describe the pathophysiological mechanisms of pulmonary and vasculothrombotic involvement of Covid-19

Gender: All

Ages: 18 Years - Any

Updated: 2025-05-29

Covid19
TSH
Cortisol