**3. Positive psychology and healthy lifestyles: what the science shows**

Research exploring the impact of healthy lifestyle practices on mental and emotional well-being and vice versa is growing. We'll cite a few examples. Research suggests that healthy nutrition can impact mood. An association between depressive symptoms and poor nutrition has been found in several studies, with the mediating role of gut microbiota posited as one mechanism of action. In a study by Jacka and colleagues [3], moderately to severely depressed individuals were randomly assigned to two groups—those who ate a Mediterranean style eating pattern with social support and those who received social support only. A depression remission rate of 32% occurred among the participants in the dietary and social support intervention group as compared with only 8% of the participants who received the social support only.

The research team of Parletta [4] observed reductions in depression when study participants adhered to the Mediterranean style eating pattern and consumed a variety of nuts and vegetables. These studies suggest that diets high in plants are essential in treating depression and decreasing negative effect. Additional studies show that predominantly plant-based diet can increase positive affect [5–8].

A large epidemiologic study of over 80,000 individuals in the United Kingdom demonstrated a dose-response relationship between consuming fruits and vegetables and happiness even after controlling for numerous confounding factors known to influence emotional well-being [7]. In a longitudinal study, participants who consumed eight or more servings of fruits and vegetables every day had the highest levels of subjective well-being [9]. Although more research is needed, these kinds of studies provide initial evidence that nutritional interventions should be considered essential when looking at achieving not only physical health, but also mental and emotional health.

Regular physical activity has also long been strongly associated with better mood and preventing and treating depression [10–13]. In fact, exercise is comparable to antidepressant medications for relieving depression [14]. Some of the mechanisms by which physical activity can be mood enhancing include boost in endorphins and other neurotransmitters, regulation of the hypothalamic-pituitary-adrenal axis, increased neurogenesis psychological distraction, and improved self-efficacy [15–17]. Even a walk as short as 10–15 min has been shown to be sufficient to boost positive effect [18].

Higher intensity aerobic exercise and resistance exercise may confer additional mood enhancing benefits [19, 20]. More research is needed to better understand the influence of different forms of exercise and different dosing and durations on mental health and the achievement of total well-being or positive health.

Sleep is another pillar of a total healthy lifestyle with 7–9 h of high-quality sleep per night recommended [21]. Lack of sleep has been shown to make individuals be more sensitive to negativity [22]. Sleep-deprived individuals were more than twice as likely to remember words with negative connotations in a memory task. Chronic insomnia can be a predictor of depression in subsequent years [23, 24] showed that sleep deprivation is also associated with anxiety disorders. Hence, getting adequate sleep is an important intervention for addressing mood disorders.

The reinforcing reciprocal link between these healthy activities and mood has been demonstrated by additional studies that show healthy lifestyles boost mood and positive emotions are associated with greater achievement and adherence to healthy activities. Positive effect drives positive lifestyle choices [25, 26].

Positive emotions can be fostered through a variety of positive psychology interventions, such as savoring, expressing gratitude supporting others, nurturing a sense of meaning and purpose. Moreover, positive emotions experienced during healthy activities prompt engagement in healthy eating and physical activity [26] and have been associated with increased utilization of preventive services [27]. Positive emotions can even forecast behavioral engagement and healthy lifestyle practices 15 months later [28, 29].

The upward spiral theory describes this reinforcing phenomenon through which pleasant intrinsic and natural emotions increase motivation and positive health behaviors by activating thought action repertoires that lead to exploring new things, building on an individual's physical, psychological, and social resources [26, 30, 31]. For example, when an individual experiences positive emotions by engaging in physical activities, he is driven to go back and re-engage in those activities over and over again. This upward, reinforcing nature is enhanced by associated benefits, called vantage resources. A happier person, for example, may be able to make more friends and expand social connections. These social supports further drive healthy, positive behaviors that increase health and happiness. Hence, an upward, outward spiral of health and happiness occurs.

Positive psychology-based activities, when prescribed in healthcare and counseling settings, have been used for managing stress and lessen negative emotions. Advancing the integration of positive psychology into health care is also essential for boosting positive emotions to enhance health and well-being. Proposed mechanisms of action for positive affect and happiness leading to improved health and longevity include improved cardiovascular health, better endocrine regulation, lower inflammation, bolstered immune system, and increased telomere length [32].

Medical practitioners can prescribe activities such as hobbies that produce a sense of flow, mindfulness practices, meaningful activities such as volunteering acts of kindness and social connection.

Although further research is needed about how prescribing these kinds of activities in a healthcare setting can impact ultimate outcomes, integration of a few these practices into medical practice warrants attention.

### **4. Key positive psychology interventions**

One framework posited by the founder of the field of positive psychology Martin Seligman is the PERMA framework—P for positive emotions, E for engagement, R for relationships, M for meaning, and A for accomplishment [33]. These five elements in the PERMA model summarize different kinds of positive psychology-based activities that can be prescribed for achieving well-being and happiness. In addition, mindfulness, which is commonly defined as paying attention to present moment experience with an attitude of acceptance or nonjudgement [34], can also be prescribed for patients who are interested.

Mindfulness practice of self-regulation, attention to the immediate experience, and an orientation of nonjudgmental openness [35] can have a number of positive health effects. The mindfulness-based stress reduction (MBSR) program developed by Jon Kabat Zin [36] has been widely studied, particularly in reducing stress resulting from chronic pain. Mindfulness is an umbrella term that refers to a variety of practices that promote control one's attention and breath, including various meditation practices.

*Positive Psychology and Healthy Lifestyles for Health and Happiness DOI: http://dx.doi.org/10.5772/intechopen.107518*

In addition to triggering beneficial physiologic effects, such as lowering blood pressure, mindfulness practices have been associated with improvements in a variety of mental health disorders, including anxiety and depression, managing physical pain, supporting substance use recovery, reducing stress in general, and promoting well-being [37–39].

When recommending mindfulness, as with any positive psychology-based interventions, practitioners need to keep in mind the patient's preferences, culture, and spiritual and religious beliefs. In some cases, negative outcomes have been reported, such as worsening depression, especially among people with a history of substance use or psychiatric illness [40].

### **4.1 PERMA**

P—positive emotions can be triggered through activities such as gratitude practice, acts of kindness, forgiveness, and savoring. These activities not only boost positive emotions, but also positive thoughts, positive behaviors, and need satisfaction [41]. Engaging in such activities serves as a protective factor to reduce the impact of stressors and risk factors, such as rumination and loneliness and allow for adaptive coping.

E—engagement, also termed flow, occurs when one is engaged in a task with a balance of the perceived challenge and the personal skills in conducting that activity. Individuals who achieve this flow state have reported some of the highest levels of happiness [41]. This flow experience is intense involvement in the activity momentto-moment with the potential to function at once fullest capacity [42, 43]. Examples of being in flow are creating art, playing a musical instrument, working on crafts, gardening, doing physical activity.

R—relationships and social connections represent the element of PERMA with the most robust longitudinal studies showing the link between relationships social connections and health and well-being [44]. Even short moments of connection with strangers can lead to positive interactions, called micro-moments of connectivity, which have been associated with positive health benefits [45]. Social support has been shown to help individuals maintain a healthy body mass index, control their blood sugar, decrease depressive symptoms, mitigate post-traumatic stress disorder, and improve their overall mental wellbeing. The Harvard development study [44], a cohort study of over eight decades, concluded that the single most important factor in physical health, happiness, and longevity is social connections.

M—meaning is the element in the PERMA model with significant health and wellbeing benefits. Research shows that having a purpose in life has a positive influence on biological, psychological, and behavioral outcomes and has a protective role in heart disease [46]. In fact, those with a higher sense of purpose use preventive healthcare services more regularly and experience fewer nights spent in the hospital [27]. Higher levels of meaning had been associated with decreased likelihood of negative health outcomes and increased positive health outcomes [46].

A—accomplishment is an essential human need. Individuals strive for goals and those who experience feelings of accomplishment by using their skills and realizing their goals feel successful and contribute to their overall sense of well-being [33].

Meaningful self-directed goals that can be feasibly achieved and provide that sense of accomplishment are essential for the overall approach to flourishing and wellbeing. Health care can facilitate positive psychology interventions by asking questions during the medical encounter about the patient's activities that boost their positive

emotions, their social connections, and their sense of meaning. Practitioners can demonstrate the essential role of positive psychology-based activities on one's health by showing that they are taking these interventions just as seriously as prescribing medications.

### **5. Positive psychology in health care**

During the clinical encounter, the practitioner can start a dialog about positive activities and ask the patients to consider exploring resources and trying different ones to see what best aligns with their interests and situation. Practitioners who would like to fully integrate positive psychology approaches into their practice for facilitating positive health might consider a structured redesign of their practice to include formal positive psychology assessments and prescriptions. A number of validated assessments of positive emotions and life satisfaction, such as the Satisfaction with Life Scale developed by Ed Diener [47], can be used. While standard of practice includes routine assessments of depression, anxiety, and stress, the emotional and mental health assessments can be expanded to also assess positive affect.

After an assessment of negative and positive emotions, the practitioner can include in the treatment or health maintenance plan, not only recommendations for a healthy diet, physical activity, sleep, and activities to manage stress, but also positive activities. Primary care and specialty settings may only have the bandwidth to conduct brief discussions of positive well-being activities—although showing that the practitioner takes positive activities as seriously as other healthy lifestyles is essential.

Positive psychology topics for discussion during the clinical encounter can vary widely. A few common ones include harnessing optimism, personal character strengths, practicing gratitude, finding meaningful activities. As time is short in a busy clinical practice, patients can be encouraged to consider doing a few exercises on their own. They can be asked to write down their vision of optimal health and happiness and the steps and activities they could do to achieve that vision. Patients could be prompted to consider their strengths and how they have successfully applied their strengths to achieve goals in the past. Keep a gratitude journal with entries of three good things in their lives once or twice a week could be another exercise. Dedicating some time to identify what is meaning in one's life or remembering recent positive events and writing them down can also enhance positive affect. Providing a handout or webpage number of options, encouraging the patients to choose at least one, and following up at the next visit along with other medical updates could be an easy strategy for integrating these approaches into the patient action plans. Acknowledging that individuals from different cultures, personalities, interests, and past experiences may benefit differently and emphasizing the need to explore various activities can help patient's comfort level for pursuing them [2].

Patients can also be referred to other members of the healthcare team or external behavioral health professionals, health coaches, and spiritual counselors for assessments, discussions, and follow-up. They can be referred to community and digital resources. A number of digital apps designed to help individuals track and boost their positive emotions, their personal strengths, and positive activities. In addition, various mindfulness and stress management classes in the community, hobby groups, volunteer organizations, and senior centers can provide opportunities for PERMA activities.

Health professionals can also bring positive interactions into the examining room, shifting the conversation during those encounters to build positive emotions. These

interactions can be as simple as asking the patients what has gone well in their lives since they were last seen and also ending encounters with a question about what went well during the encounter.

A few examples of questions that can be asked include: What happened in the past week that made you smile. What in your life brings you joy? What's a favorite activity that you have done recently? What's something that you are looking forward to in the coming week? Is there something fun you'd like to do in the near future?

Coaches have been integrating positive psychology techniques into healthy behavior counseling for over two decades, such as combined positive psychology and motivational interviewing practices. Health professionals who are counseling for health behavior change can learn from these practices. Both motivational interviewing and positive psychology coaching have their roots in person-centered theory. Integrating positive psychology into coaching harnesses the upward spiral theory we introduced earlier. Positive visioning is another method to help engage patients to look at a positive future when they make their changes, during that positive visioning, they are already boosting their positive emotions.

Positive interactions with patients create positivity resonance for both the patient and for the health practitioner. The work of Barbara Fredrickson and colleagues [48] shows that positivity resonance leads to physiologic benefits, such as boosts of the parasympathetic nervous system, when a synchrony of positive emotions occurs between individuals or within a group.

Another essential aspect of positive psychology is character strengths. Health practitioners and individuals can identify their individual strengths either informally by making an assessment of family and friends and what they notice as the individual's strengths or more formally, through a validated questionnaire at viacharacter.org. Making a concerted effort to identify one's strengths and use them on a regular basis can boost one's well-being. Health practitioners can encourage patients to identify their character strengths and build them into their action plans for health behavior change and positive health.

A coach or health practitioner can bring these strengths out by asking questions such as: Tell me about your past achievements. How did you make it happen? Think back over the previous week or month; when were you at your best? Among your family or friends what are you most famous for?
