Effects of HRV Biofeedback, Interoceptive Training, and Mindfulness on Stress in University Students and Staff

NCT ID: NCT06695715

Last Updated: 2024-11-19

Basic Information

• Recruitment Status: NOT_YET_RECRUITING
• Clinical Phase: NA
• Total Enrollment: 120 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2025-01-31
• Study Completion Date: 2026-02-28

Brief Summary

The goal of this clinical trial is to learn if Heart Rate Variability Biofeedback (HRV-BF), Mindfulness programs, and Interoception training can reduce stress, improve well-being, and induce brain changes in university students and staff at the University of Seville. The main questions it aims to answer are:

• Does HRV-BF training reduce stress, improve emotional regulation, and cause measurable brain changes in participants?
• Does Mindfulness training reduce perceived stress, improve mental health, and lead to changes in brain activity?
• Does Interoception training enhance emotional self-regulation, reduce stress, and produce changes in brain function?
• How do the effects on the brain compare between the different types of training (HRV-BF, Mindfulness, and Interoception)?

If there is a comparison group: Researchers will compare participants who receive HRV-BF, Mindfulness, and Interoception training to a waitlist control group to see if any of these interventions lead to greater reductions in stress, improvement in emotional regulation, or brain activity changes.

Participants will:

• Complete pre- and post-training assessments to measure stress levels, anxiety, emotional regulation, and brain activity using EEG (electroencephalography).
• Participate in one of three interventions:

HRV-BF training, where participants learn to use biofeedback to improve heart rate variability and manage stress.

Mindfulness-based stress reduction, which involves meditation and mindful awareness techniques to reduce stress and improve mental health.

Interoception training, where participants learn to focus on internal bodily signals (like heartbeat and breath) to improve emotional regulation and manage stress.

Each intervention will last six weeks, and participants will be assessed at the beginning and end of the program. This study aims to determine which intervention is most effective at reducing stress, improving mental health, and producing beneficial changes in brain activity in university community members.

Detailed Description

All people experience stress at certain times, as it is a natural response to threats. However, a complex interaction of social, technological, work-related, and environmental factors has contributed to a prolonged stress response, leading to a rise in chronic anxiety problems throughout the 21st century. According to the National Health Survey, 6.7% of adults report chronic anxiety. Furthermore, there is a significant gender gap, with prevalence being twice as high in women as in men (9.1% in women and 4.3% in men). Members of the university community are not immune to this issue. Several recent studies have highlighted that, for example, university students are exposed to alarmingly high levels of stress. According to various surveys, 35% of higher education students suffer from anxiety, and 30% suffer from depression. Moreover, this is a global phenomenon. In the United States, a survey by the American College Health Association shows that stress has become the most serious obstacle to studying among American students; in the United Kingdom, another study shows that 45% of students report feeling stressed by their courses. Gender, as a demographic factor, also seems to play a significant role, as female students are the most affected, not only by stress but also by other aspects of mental health. In fact, this represents another problem: most university students report, in addition to stress, a large number of symptoms associated with mental health problems, such as sadness, lack of energy or motivation, anxiety, depression, hopelessness, insomnia, irritability, mood swings, panic, or self-harm ideations. Another aspect that has negatively impacted not only stress but also the mental health of the student population worldwide has been the COVID-19 pandemic. Several studies have shown an increase in stress among university students from various countries, both European and non-European, following the start of the pandemic. Regarding the working members of the university community, such as teaching and research staff (PDI) or administrative and service staff (PTGAS), chronic work-related stress and associated pathologies, such as burnout syndrome, are among the leading emerging psychosocial risks. In this population, sociodemographic factors such as age and gender play a fundamental role, with younger staff and, within this group, women, scoring the highest in areas related to emotional exhaustion and stress. In particular, among the PDI, younger women in the social sciences, in the early stages of their professional development, with lower contractual figures and high teaching loads, experience higher levels of stress. Both stress and other mental health issues decrease quality of life, increase absenteeism among workers and students, and reduce professional and academic performance within the university community. Therefore, the development of preventive and palliative strategies, within the university itself, to reduce the impact of stress and protect the health and well-being of its members is highly recommended. By implementing these measures and promoting a culture of well-being, universities can help mitigate the negative impact of stress and improve the quality of life of their community members. In this context, it is a priority to develop new, cost-effective, and accessible stress reduction programs within the university space. Three approaches that meet these criteria are Heart Rate Variability Biofeedback (HRV-BF), Mindfulness-based programs (MBPs), and Interoception Training programs (ITPs). Heart Rate Variability (HRV) is the temporal variation between successive heartbeats (RR intervals) and serves as a quantitative biomarker of the autonomic nervous system (ANS) balance and physiological stress. Dysregulation of the ANS, mainly increased sympathetic activity and decreased parasympathetic activity (vagal hypofunction), is a common feature of chronic stress, anxiety, and mood disorders and appears to be a central biological substrate linking these disorders to a range of physical dysfunctions. Alterations in the functioning of the autonomic nervous system that promote a decrease in vagal (parasympathetic) activity are reflected in reductions in HRV indices, which in turn are associated with emotional dysregulation, decreased psychological flexibility, and faulty social engagement-disorders linked to hypoactivity in the prefrontal cortex. Similarly, work-related stress has been shown to reduce HRV. On the other hand, high HRV indicates greater parasympathetic activity and better self-regulation, which is associated with a lower cardiovascular risk and better cognitive performance. Together, these findings support the idea that HRV could represent a useful endophenotype for psychological/physical comorbidities, and its measurement and routine application should be recommended to assess the effectiveness of training based on these measures for emotional regulation dysfunctions. Indeed, HRV is currently considered a biomarker of the ANS function associated with both physical and mental health and well-being. Biofeedback is a way of helping individuals develop greater awareness and the ability to regulate their physiological functioning using signals from their own bodies to improve their well-being, health, and performance. Specifically, HRV biofeedback is a well-established and empirically supported technique to improve emotional self-regulation and alleviate symptoms of stress, anxiety, and other psychophysiological disorders. Quantitative studies suggest that HRV-BF training reduces anxiety by 26%, fatigue by 15%, blood pressure by 10%, cholesterol by 14%, and increases fitness levels by 40%. During HRV-BF training, individuals learn to breathe slowly, gradually reaching the optimal breathing frequency that maximizes HRV. Additionally, it has recently been shown that this training induces plastic changes in brain activity and connectivity in regions related to emotion regulation and executive functions. Although there are numerous studies highlighting the effectiveness of HRV-BF in reducing stress, most of them rely on subjective measures obtained through self-reports, so there is a need for research that includes both neuropsychological and physiological parameters when analyzing the effectiveness of biofeedback training in preventing and reducing stress in high-demand work or academic environments. Mindfulness has been defined as "paying attention in a particular way, on purpose, in the present moment, and without judgment". The first mindfulness-based stress reduction (MBSR) program was developed over 50 years ago by Jon Kabat-Zinn, and since then, countless scientific studies have demonstrated the effectiveness of MBPs in reducing stress, as well as their efficacy in treating anxiety and depression disorders. In fact, a recent randomized clinical trial has shown that MBPs are as effective as escitalopram (first-choice medication) in treating anxiety disorders. Various formats of MBPs for stress reduction among university community members have been used in several studies, varying primarily in the focus of attention, duration, or the traditional in-person nature of the training versus those guided by new technologies (apps). Despite this variability, all these studies show a positive effect of these programs on perceived stress in this population. Also, like HRV-BF, all reviewed studies rely on self-reports of stress without measuring or evaluating any psychophysiological or neurophysiological parameters (objective). In conclusion, the success of MBPs in reducing or mitigating stress in university community members makes these techniques a useful tool for preventing psychosocial risks, such as stress, in university settings. In recent years, our understanding of the physiological changes associated with mindfulness practice, as well as the potential mechanisms underlying its efficacy and effectiveness as a treatment for various mental disorders, has significantly advanced. For example, it is widely accepted that the implementation of an MBP in non-clinical samples leads to an increase in HRV. On the other hand, similarly to the case of HRV-BF, mindfulness practice can modulate prefrontal cortex activity, promoting emotional regulation, cognitive control, attentional stability, and resilience to stress. These changes may underlie many of the cognitive and emotional benefits associated with mindfulness training. However, individual responses to mindfulness practices can vary, and further research is needed to fully understand the underlying mechanisms of these effects. Interoception is the process by which the nervous system perceives, interprets, and integrates signals from within the body, including sensations from internal organs and physiological states. This encompasses sensory signaling (neural and humoral), perceptual processing, and the psychological representation of such sensations. In simpler terms, interoception is the ability to feel and understand what is happening inside the body, such as heartbeat, breathing, hunger or fullness, thirst, and body temperature. Interoception plays a key role in emotion regulation, decision-making, self-awareness, and health regulation. Some authors suggest that interoception plays a key role in emotional experience, as it allows individuals to recognize their emotional states and regulate them. It has also been shown that emotional dysregulation can result in distorted perceptions of interoceptive information, and vice versa, that training interoception improves emotional regulation and helps reduce anxiet. In fact, recent studies have shown that interoception training can improve mental health outcomes, including emotional regulation and stress management, and it is considered a promising intervention for those suffering from high levels of stress and anxiety. Recent research into interoception has led to the development of interoceptive training programs, which have proven effective in reducing stress, improving emotion regulation, and increasing mindfulness. A growing body of evidence suggests that ITPs can enhance emotional awareness and regulation and improve autonomic nervous system regulation, potentially contributing to reduced anxiety and stress. To summarize, interoception-based interventions provide promising strategies for reducing stress and improving well-being by fostering greater body awareness and self-regulation. Like HRV-BF and MBPs, ITPs can be easily implemented in university settings and may represent a cost-effective alternative for managing stress. However, like mindfulness, it would benefit from more research into the neurophysiological and cognitive effects of such training, especially in terms of potential changes in brain activity related to emotional regulation and stress reduction.

Although the scientific evidence on the benefits of HRV-BF (Heart Rate Variability Biofeedback), MBPs (Mindfulness-Based Programs), and ITPs (Interoception Training Programs) in relation to stress reduction is more than notable, to the best of our knowledge, there are no randomized experimental studies analyzing the effectiveness of HRV-BF, MBPs, and ITPs in the prevention and/or reduction of stress that rely on the evaluation of variables of different natures: psychological, neuropsychological, psychophysiological, and neurophysiological. Furthermore, it would be of great interest to conduct a long-term evaluation of the effects of these training programs.

The aim of this project is to analyze the impact of a HRV-BF training program, an MBP, and an ITP among members of the University of Seville community, evaluating their effects on stress in both women and men through neuropsychological, psychophysiological, and brain activity measures.

Conditions

Stress; Anxiety

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: HEALTH_SERVICES_RESEARCH
• Blinding Strategy: NONE

Study Groups

Mindfulness

The Mindfulness Training program will be based on the Mindfulness-Based Stress Reduction (MBSR) program and Jon Kabat-Zinn's Mindful Awareness practices, but will also include elements of self-compassion and acceptance.

Intervention: During the six weeks of the program, participants will take part in a guided 45-minute formal session. Examples of formal guided meditations include mindfulness of breath and mindfulness of thoughts, feelings, and physiological sensations. Informal meditation practices will consist of brief pauses throughout the day, during which participants will voluntarily direct their attention to the present moment without judgment. Finally, participants will be provided with 10 audio recordings of guided meditations, recorded by a member of the research team, to support formal meditation at home (10-15 minutes four times a week), as well as a series of readings focused on the concepts of acceptance and self-compassion.

Group Type: EXPERIMENTAL

Mindfulness Training Program

Intervention Type: BEHAVIORAL

This mindfulness training program is based on the Mindfulness-Based Stress Reduction (MBSR) model developed by Jon Kabat-Zinn, incorporating elements of self-compassion and acceptance. What sets this program apart is its integration of both formal and informal practices. Participants engage in 45-minute guided sessions focused on breath awareness and the observation of thoughts, emotions, and physical sensations. Additionally, informal practices include brief daily moments of present-moment awareness. Participants will also receive 10 audio recordings for at-home practice, enhancing the program's accessibility and supporting consistency.

HRV Biofeedback Training (HRV-BF)

The HRV BF training will last for 6 weeks. There will be five training sessions per week, including four home sessions and one in-person session at the Neurociencia del Bienestar group laboratory (CTS-1129) at the Faculty of Psychology of the University of Seville. Each session will last 20 minutes. The laboratory session will be conducted using the Procomp Infiniti biofeedback equipment (Thought Technologies). For the home HRV-BF sessions, we will use a novel methodology recently described (Schumann et al., 2021). The heart rate will be recorded using a sensor embedded in a strap that will be worn around the participant's chest (H10/H7 heart rate sensor; Polar Electro Oy, Kempele, Finland). Via Bluetooth, the mobile app EliteHRV (Elite HRV LLC, 2017) will collect data from the sensor, store the recordings, and display the heart rate. The heart rate oscillations will be shown on the participants' smartphone screens as real-time visual feedback of their heart rate.

Group Type: EXPERIMENTAL

HRV Biofeedback

Intervention Type: BEHAVIORAL

This HRV biofeedback training program is distinguished by its combination of advanced technology and a novel at-home methodology. Participants will engage in five weekly sessions, with four conducted at home using a heart rate sensor and the EliteHRV mobile app, which provides real-time feedback on heart rate variability. One session per week will take place in the lab, utilizing the Procomp Infiniti biofeedback system. The at-home approach is based on recent research (Schumann et al., 2021), offering participants a flexible yet structured method to practice biofeedback and improve heart rate variability over the six-week program.

Interoceptive Training

During the 6 weeks of the program, participants in this group will complete a 45-minute formal guided interoceptive training session at the Faculty of Psychology. During these sessions, the focus will be on developing internal body awareness through various strategies. Participants will learn to pay attention to internal sensations such as breathing and muscle tension using guided techniques. The program will include exercises to feel the flow of breath and relax specific areas of the body. The trainer will provide feedback and adjust techniques based on the participants' needs. Instructions will be given on how to integrate these practices into daily life to improve self-care and self-regulation. Finally, participants will be provided with 10 audio recordings of guided interoceptive exercises, recorded by a member of the research team, to support formal training at home (10-15 minutes, four times a week).

Group Type: EXPERIMENTAL

Interoception Training

Intervention Type: BEHAVIORAL

The interoception training program stands out by its focus on developing internal body awareness through structured guided sessions. Participants will engage in weekly 45-minute formal sessions at the university, where they will learn to focus on internal sensations like breath and muscle tension using specific techniques. Additionally, participants will receive 10 guided interoceptive exercises to practice at home, four times a week. This program not only focuses on the physical sensations but also integrates these practices into daily life, aiming to improve self-care and self-regulation over the six weeks, with personalized feedback provided.

Waiting list control group

Participants assigned to the waitlist control group will be key to ensuring the validity and reliability of the results of this project, allowing for precise and controlled comparisons of the effectiveness of the different training programs. These participants will also be evaluated at the beggining and the end, even though they will not participate in any training program. Once the program is completed, they will be offered the opportunity to participate in some of the training programs used in this project.

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

Mindfulness Training Program

This mindfulness training program is based on the Mindfulness-Based Stress Reduction (MBSR) model developed by Jon Kabat-Zinn, incorporating elements of self-compassion and acceptance. What sets this program apart is its integration of both formal and informal practices. Participants engage in 45-minute guided sessions focused on breath awareness and the observation of thoughts, emotions, and physical sensations. Additionally, informal practices include brief daily moments of present-moment awareness. Participants will also receive 10 audio recordings for at-home practice, enhancing the program's accessibility and supporting consistency.

Intervention Type: BEHAVIORAL

HRV Biofeedback

This HRV biofeedback training program is distinguished by its combination of advanced technology and a novel at-home methodology. Participants will engage in five weekly sessions, with four conducted at home using a heart rate sensor and the EliteHRV mobile app, which provides real-time feedback on heart rate variability. One session per week will take place in the lab, utilizing the Procomp Infiniti biofeedback system. The at-home approach is based on recent research (Schumann et al., 2021), offering participants a flexible yet structured method to practice biofeedback and improve heart rate variability over the six-week program.

Intervention Type: BEHAVIORAL

Interoception Training

The interoception training program stands out by its focus on developing internal body awareness through structured guided sessions. Participants will engage in weekly 45-minute formal sessions at the university, where they will learn to focus on internal sensations like breath and muscle tension using specific techniques. Additionally, participants will receive 10 guided interoceptive exercises to practice at home, four times a week. This program not only focuses on the physical sensations but also integrates these practices into daily life, aiming to improve self-care and self-regulation over the six weeks, with personalized feedback provided.

Intervention Type: BEHAVIORAL

Eligibility Criteria

Inclusion Criteria

• Members of the University of Seville community over 18 years old (students, teaching staff, and administration and service staff)
• Be able to attend at least five of the six weeks of the Heart Rate Variability Biofeedback (HRV-BF) and Mindfulness (PEM) training programs
• Have a smartphone.

Exclusion Criteria

• Members of the University of Seville community who are experiencing severe anxiety or depression; a serious mental illness, such as hypomania or psychotic episodes; recent grief or a major loss; any heart disease; any other serious physical or mental health condition that may affect their ability to participate in the training program.

• Minimum Eligible Age: 18 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

University of Seville

OTHER

Sponsor Role: lead

Responsible Party

Francisco M. Ocaña Campos

PhD. Associate Professor of Psychobiology. Principal Investigator of the Wellness Neuroscience Group-

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Francisco M Ocaña, PhD

Role: PRINCIPAL_INVESTIGATOR

Wellness Neuroscience Group. University of Seville

Locations

Faculty Of Psychology. University of Seville

Seville, Seville, Spain

Countries

Spain

Central Contacts

Francisco M Ocaña, PhD

Role: CONTACT

fmocana@us.es

+34 954 55 77 75

Emilio Durán, PhD

Role: CONTACT

durang@us.es

+34 954554401

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Other Identifiers

SICEIA-2024-002431

Identifier Type: -

Identifier Source: org_study_id