1. Introduction

The Japanese economy grew steadily before the ‘Bubble economy’ collapsed in the early 1990s. However, during the 1990s, it stopped growing. This situation induced extreme stress in society, leading to worsened mental health. Accordingly, suicides increased starting in the late 90s. Since 1998, there have been over 30,000 suicides over 14 years [1]. According to a survey by the Metropolitan Police Department, among cases with a document clearly indicating the cause of the suicide, about 47% were preceded by health problems, including mental health. In response, what is required of us is neither healing nor escaping from stress [2]. Rather, what is required is enhancing resilience to stress and learning from it, and then proactively changing the situation.

1.1.  Resilience

The concept of resilience has drawn recent attention for various reasons. Resilience refers to the ability to recover from stress and fight against stress to improve the situation. Resilience is a term derived from physics originally used to reflect ‘elasticity and repulsion.’ In the 1970s, the study of resilience began in child psychiatry. Those with a healthy personality, despite having an adverse childhood, were considered highly resilient [3]. The study of resilience has now spread to recovery from war experience and post-traumatic stress disorder (PTSD) resulting from natural disasters like earthquakes and typhoons. It refers not only to recovery of normal mental health status, but the ability to fight against stresses, overcome, learn, and then change the situation [4- 7].

How a person recognizes a stressful situation will in part determine whether the resulting state is despair or growth. Self-image, that is, how one thinks and feels about the self, is a critical point here [8].

Munakata suggests that “self-image is the immobilized past memory of experience with self-interpretation and the memory synchronized with the self” and “a belief of self-image is named self-image script.” He says that self-image determines the perspective for interpreting a stressful situation. High resilience to one’s self-image is associated with high self-affirmation [9], problem-solving [10], self-expression, independence [11], and reduced depression [12].

2.       Methods

2.1.  Recruitment of participants

Participants were recruited from a metropolitan area, especially around Bunkyou-ku in Tokyo, and an announcement was created in some local newspapers. The citizen lecture on stress management was carried out at public facility A in Bunkyou-ku, Tokyo, 1 month after the Great East Japan Earthquake. There were 56 participants. After the lecture, we introduced the SAT resilience program and the Shakkiri exercise program as stress management programs. We asked participants to join the program in advance, and 55 participants were pre-registered on March 11, 2011. The intervention seminars took place in conference rooms A and B in the same public facility from 13:00 to 15:00.

2.2.  Intervention subjects

There were 17 participants (3 male, 14 female) in the SAT resilience program (SAT group), and 9 (9 female) in the exercise program (Shakkiri exercise). Participants ranged from 21 to 78 years old, and participation rate from the civic lecture was 47.3%. Participants selected one of the stress management programs.

2.3.  Invention protocol

1. Intervention preparation (30 min)

First, all subjects assembled in conference room A. We announced a brief description of the programs and asked the subjects to sign a consent form. Second, centrifuge tubes were given to each subject, and their saliva was collected. Each participant then answered an anonymous psychological questionnaire with a unique number. Collected saliva samples were closed and stored in a polystyrene foam box with ice packs box immediately to be sent for professional biochemical examination (SRL Co., Ltd) on the same day. Each subject had two centrifuge tubes for saliva collection and signed with their unique number and name by Katakana for saliva examination. We marked the collected centrifuge tubes to indicate pre-/post-intervention when tubes were collected. Immediately after the seminar, the box was sent for saliva examination. Delivery was specified for the next day.

2. SAT resilience program (1 hour)

The SAT resilience improvement sheet and the surrogate facial representative list were given to subjects in the conference room A. SAT therapy developer lectured on the SAT resilience program with these documents. He demonstrated image work modeling exercise with the resilience improvement sheet, and later, all subjects practiced the image work modeling exercises.

3. Shakkiri exercise program (1 hour)

We instructed subjects to arrive with exercise clothes. The exercise program called Shakkiri exercise was demonstrated by its developer in conference room B. First, the effects of Shakkiri exercise were described, which include releasing shoulder stiffness, leading to mental and physical refreshment. Following the instructions, subjects sat on chairs and practiced Shakkiri exercise with music.

4. Psychological test and saliva collection (30min)

Both groups gathered again in conference room A after program completion.

Centrifuge tubes were handed out to each subject and their saliva was collected. Participants then answered the psychological questionnaire using their unique number, and no name was signed. Collected saliva was stored and delivered in the same way as in pre-intervention.

5. Collecting the questionnaire at 1-month follow-up

The same questionnaires were administered to subjects with a reply envelope to return the papers 1 month post-intervention. We sent a reminder to improve response rates.

6. Ethical considerations

We explained to participants orally and in writing that they would not be personally identified, and that the participation would be of their own free will. Approval was obtained from the Ethical Committee of the Graduate School of Comprehensive Human Sciences, University of Tsukuba.

7. Contents of the psychological questionnaire
8. Mental Resilience Scale (21 items, 63 points) [13]
9. Self-Affirmation Scale (10 items, 20 points) [14]
10. Self-Representation Behavioral Scale (10 items, 20 points) [14]
11. Problem Solving Behavioral Scale (10 items, 20 points) [15]
12. Mental Independence Behavioral Scale (10 items, 15 points) [15]
13. Mental Support from Family Scale (10 items, 10 points) [16]
14. Mental Support from Others Scale (10 items, 10 points) [17]
15. Self-Rating Depression Scale (SDS; 20 items, 80 points) [18] [19]
16. State-Trait Anxiety Inventory (STAI; 20 items, 80 points) [20] [21]
17. Face sheet items

Age, sex, occupation, counseling experience, and existence of present mental stress.

2.4.  Intervention details

1. SAT resilience program

SAT therapy assumes that resilience is increased by belief in one’s self-image, representing the self without others’ feelings or thoughts, and active problem solving. There is a structured self-image sheet based on the theoretical assumptions of SAT therapy. Participants were guided individually to follow the instructions with the self-image sheet. They created imaginary siblings and children with surrogate facial representatives. They were advised to look at the surrogate facial representatives daily.

2. Shakkiri exercise program

After warming up, participants stretched their bodies with light music while sitting on a chair. Rhythmic motion activates secretion of serotonin, leading to mental stability [22]. For cool down, participants were sprinkled with a scent and they relaxed their body with eyes closed. This program is intended to relax the body and soul. They were advised to practice Shakkiri exercise daily.

2.5.  Hypothesized intervention effects

For the SAT resilience program, we hypothesized that intervention effects would show improved anxiety, depression, and increased salivary SIgA at post-intervention. Further, self-image (script) would show improved self-representation, mental independence, self-affirmation, and problem-solving behavior. Depression in particular would decrease over 1 month. On the other hand, effects of Shakkiri exercise would include improved anxiety, depression, and increased salivary SIgA. However, self-image factors are not hypothesized to change. Further, depression would not continue decreasing over 1 month.

2.6.  Analysis

SPSS (version 19.0) was used for statistical analysis. Cronbach’s alpha was computed to test reliability. Correlations were estimated using Spearman’s rank-order correlation to study criterion-related validity based on SDS as the external criterion. Pre-/post-intervention results for psychological measured were measured using the Mann–Whitney U-test. For the 1-month follow-up, we used the Wilcoxon signed-rank test, with Bonferroni correction after the Friedman test.

Table 1. Reliability and validity of each scale

3.       Results

3.1.  Reliability and validity of scale analysis

Reliability of each scale as measured by Cronbach’s alpha is shown as Table 1. Most were over 0.7, except perceived mental support from others post-intervention. Spearman’s rank-order correlation measured criterion-related validity with SDS as the criterion variable.

Note: a) Cronbach’s alpha b) Criterion-related validity based on SDS as the criterion. Each scale was studied by correlation analysis.

N = 26, *p < .05; **p < .01

3.2.  Change in SIgA

In general, changes in SIgA are associated with reduced physical ability and changes in mucosal tissue, as  well as a weakened immune system [23]. Willemsen (2002) found that, among 78 males and 79 females, males show greater secretion of SIgA than females do during an active coping task [24] [25]. A large-scale epidemiological study of 2153 adults showed that males secrete more saliva as well as SIgA. However, this decreases with age, and lower socioeconomic status is associated with reduced saliva production [26]. Therefore, we considered potential bias from age and sex in the comparison between the SAT group (age range 34 to 60, 9 females) and the exercise group (age range 32 to 57, 9 females). Both the SAT group and the exercise group showed increased secretion of immunoglobulin SIgA, showing improved immunity (Figs. 1 and 2).

Wilcoxon signed-rank test (*p = 0.05)  N = 9

Pre-intervention – post-intervention (z = -2.429, p = 0.015)

Wilcoxon signed-rank test (*p = 0.05)  N = 9

Pre-intervention – post-intervention (z = -1.836, p = 0.012)

3.3.  State anxiety and depression

For the SAT group, a significant difference in depression and anxiety was observed between pre- and post-intervention and pre-intervention and the 1-month follow-up (Fig. 3), but there was no such difference between post-intervention and the 1-month follow-up. There were significant differences between pre- and post-intervention and the 1-month follow-up, with sample size of 17 (all SAT program participants).

A significant difference in depression was also observed pre-/post-intervention in the exercise group. However, there was no such difference at the 1-month follow-up, and no trend even at the 10% level. A significant difference in state anxiety was not observed pre-/post-intervention or between pre-intervention and the 1-month follow-up, nor was there a trend at the 10% level (Fig. 4)

Friedman test (x² = 16.710, p < 0.001) N=9

Wilcoxon signed-rank test, pre- – post-intervention (z = -2.677, p = 0.007); pre-intervention – 1-month follow-up (z = -2.668, p = 0.008)

Bonferroni correction  * < .025

Friedman test (x² = 0.800, p = 0.670) N = 9

3.4.  Changes in self-image script

In the SAT group, a significant difference in problem-solving behavior was observed between pre- and post-intervention and pre-intervention and the 1-month follow-up at the 5% level (Fig 5). A significant difference in self-affirmation was observed between pre-intervention and 1-month follow-up (Fig. 6). A trend at the 10% level were observed for mental resilience and self-representation. Significant differences in mental resilience and self-representation were observed for pre-/post-intervention and the 1-month follow-up at the 5% level.

In the exercise group, a significant difference in mental resilience and depression was observed pre-/post-intervention. At the 1-month follow-up, a significant difference was not observed, nor was there a trend at the 10% level. No significant differences were observed for self-affirmation, self-representation, problem-solving, or mental independence pre-/post-intervention or at the 1-month follow-up, nor was there was trend at the 10% level.

Friedman test (x² = 9.750, p = 0.008) N = 9

Wilcoxon signed-rank test, pre- – post-intervention (z = -2.492, p = 0.013); pre-intervention – 1-month follow-up (z = -2.490, p = 0.013)

Bonferroni correction  *< .025

Friedman test (x² = 11.655, p = 0.003) N = 9

Wilcoxon signed-rank test, pre- – post-intervention (z = -1.975, p = 0.048); pre-intervention – 1-month follow-up (z = -2.374, p = 0.0176)

Bonferroni correction  *< .025

3.5.  Mental support from family

A significant difference in both groups was observed, though this was a trend at the 10% level for the SAT group. A significant difference in mental support from family was observed at pre- and post-intervention and at the 1-month follow-up.

4.       Discussion

We comparatively studied the SAT resilience program as the intervention group and an exercise group as the control group. We measured state anxiety, depression, and secretion of immunoglobulin in saliva (SIgA) at pre- and post-intervention. In the SAT group, a significant difference was observed in state anxiety, depression, and SIgA.

In the exercise group a significant difference was observed in depression and SIgA, excluding state anxiety. This result was similar to previous findings on cancer patients. One type of SAT imagery therapy, three-generation therapy (participants image their mother’s womb and go back three generations, and then change their brief self-image by changing the image of crisis in the womb), developed in 2009, was carried out on cancer patients in the form of both group intervention and DVD intervention [27]. It showed that state anxiety and depression decreased significantly and SIgA increased significantly. It has also been reported that exercise increases SIgA secretion [28].

In this study, which used SAT imagery therapy, mental health and an immunity indicator (SIgA) improved between pre- and post-intervention. Changing the self-image can occur between pre- and post-intervention, a change particularly evident in problem-solving behavior. The intervention group had memories that their parent contacted their true self in terms of strictness, expression, and sadness. Therefore, they did not experience the feeling of being protected by the parent, and they had feelings of fear, anxiety, panic, self-hatred, and a sense of helplessness with regard to their true self. They even felt hopeless for the future. With daily observance of the surrogate facial representations of wished family, it is expected they would not feel fear, anxiety, self-hatred, panic, or helplessness.

Once the subjects engaged daily with the facial representation of wished  family (SKP), their expectations of family decreased, and their family image improved. This has been shown in actual SKP therapy. It is thought that improving the family image, including parents and facial images of wished family (SKP), decreases feelings of fear, anxiety, and self-hatred, as well as improving self-image. Some benefits of this view of the self-image include, “it is less likely to get emotional,” “able to judge while confirming each fact,” and “try to make a forecast and plan before new initiatives.” This facilitates the ability to forecast to solve the problem independently, helping to improve state anxiety and depression as well as immunity. A significant difference was observed in self-image, state anxiety, and self-affirmation in the SAT group from pre-intervention to 1-month. To compare with the exercise group, the SAT sample was reduced to 9. There was no difference at the 5% level, but there was a trend at the 10% level. For the entire SAT group (17 participants), there was a significant difference in self-affirmation, self-representation, and problem-solving, but not mental independence between pre-intervention and 1-month follow-up. State anxiety, depression, and mental resilience also significantly improved. The SAT resilience program improved mental health not only in the short term, but also 1 month later. Resilience developed into the strength to recover from stress, fight against stress, and improve. The self-image script of self-affirmation, self-representation, problem-solving, and mental resilience remained. State anxiety and depression seemed to be prevented. However, there was not an appropriate control group for the 17 participants. Thus, the implications remain unclear. Previous research on nurses did not find a significant difference in the non-intervention group for a short-term intervention.

In a group intervention that applied SKP imagery therapy, characteristic anxiety decreased after 6 months. This was apparently caused by improvement of the self-image script, reflecting self-value and characteristic behavior including problem-solving, self-repression, and emotion recognition [29]. Only self-affirmation changed significantly in a comparison of the assertion training group; however, in SKP imagery therapy, all self-image script factors—self-value and characteristic behavior including depression and problem-solving—changed significantly [30]. Given these considerations, the findings should extend to the general population. Further research with larger control groups is required. This appears to be a sustainable effect, however, as a short-term intervention of company management improved characteristic behaviors including self-repression, anxiety, and depression up to a 6-month follow-up [31].

This study was an intervention study of resilience among the general population on their resistance to daily stresses. Because of the earthquake in eastern Japan, some of the participants might have been under unusual stresses. Regarding this situation, we should consider individual intervention. Several issues remain for future study. Sample size should be increased for both groups. Further, the SAT therapy should be extended beyond the simple SAT method to the clinical three-generation therapy method, even for the short term. Therefore, to apply three-generation therapy, development is required to be appropriate for group work and sustainable effects. We will consider developing the short program as well as a 3-day training program moving forward.

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