Have you experienced that your attentions is more focused in the morning than late afternoon?
Have you wondered what is the best time in the day to have a job interview?
Is it better to have an operation in the morning or in the afternoon?
These and many other questions are explored in the superb book by Daniel Pink, When-The scientific secrets of perfect timing. This book reviews the literature of chronobiology, psychology, and behavior economics and describes the effect of time of day on human behavior. For example, students do significantly better if they take math tests in the morning than late afternoon or parolees have a much higher chance of being paroled early morning or right after the judge has taken a break than before lunch or late afternoon. Read Pink’s book or watch his JCCSF presentation and use the information to change your own timing patterns to optimize your health and performance.
This blog has been reprinted from: Peper, E., Lin, I-M., Harvey, R., & Perez, J. (2017). How posture affects memory recall and mood. Biofeedback, 45 (2), 36-41.
When I sat collapsed looking down, negative memories flooded me and I found it difficult to shift and think of positive memories. While sitting erect, I found it easier to think of positive memories. -Student participant
The link between posture and mood is embedded in idiomatic phrases such as walking tall, standing proud, and an upstanding citizen, versus collapsed, defeated, or in a slump–Language suggests that posture and mood/emotions are connected. Slumped posture is commonly observed in depression (Canales et al., 2010; Michalak et al., 2009) and adapting an upright posture increases positive affect, reduces fatigue, and increases energy in people with mild to moderate depression (Wilkes et al., 2017; Peper & Lin, 2012).
This blog describes in detail our research study that demonstrated how posture affects memory recall (Peper et al, 2017). Our findings may explain why depression is increasing the more people use cell phones. More importantly, learning posture awareness and siting more upright at home and in the office may be an effective somatic self-healing strategy to increase positive affect and decrease depression.
Most psychotherapies tend to focus on the mind component of the body-mind relationship. On the other hand, exercise and posture focus on the body component of the mind/emotion/body relationship. Physical activity in general has been demonstrated to improve mood and exercise has been successfully used to treat depression with lower recidivism rates than pharmaceuticals such as sertraline (Zoloft) (Babyak et al., 2000). Although the role of exercise as a treatment strategy for depression has been accepted, the role of posture is not commonly included in cognitive behavior therapy (CBT) or biofeedback or neurofeedback therapy.
The link between posture, emotions and cognition to counter symptoms of depression and low energy have been suggested by Wilkes et al. (2017) and Peper and Lin (2012), . Peper and Lin (2012) demonstrated that if people tried skipping rather than walking in a slouched posture, subjective energy after the exercise was significantly higher. Among the participants who had reported the highest level of depression during the last two years, there was a significant decrease of subjective energy when they walked in slouched position as compared to those who reported a low level of depression. Earlier, Wilson and Peper (2004) demonstrated that in a collapsed posture, students more easily accessed hopeless, powerless, defeated and other negative memories as compared to memories accessed in an upright position. More recently, Tsai, Peper, and Lin (2016) showed that when participants sat in a collapsed position, evoking positive thoughts required more “brain activation” (i.e. greater mental effort) compared to that required when walking in an upright position.
Even hormone levels also appear to change in a collapsed posture (Carney, Cuddy, & Yap, 2010). For example, two minutes of standing in a collapsed position significantly decreased testosterone and increased cortisol as compared to a ‘power posture,’ which significantly increased testosterone and decreased cortisol while standing. As Professor Amy Cuddy pointed out in herTechnology, Entertainment and Design (TED) talk, “By changing posture, you not only present yourself differently to the world around you, you actually change your hormones” (Cuddy, 2012). Although there appears to be controversy about the results of this study, the overall findings match mammalian behavior of dominance and submission. From my perspective, the concepts underlying Cuddy’s TED talk are correct and are reconfirmed in our research on the effect of posture. For more detail about the controversy, see the article by Susan Dominusin in the New York Times, “When the revolution came for Amy Cuddy,”, and Amy Cuddy’s response (Dominus, 2017;Singal and Dahl, 2016).
The purpose of our study is to expand on our observations with more than 3,000 students and workshop participants. We observed that body posture and position affects recall of emotional memory. Moreover, a history of self-described depression appears to affect the recall of either positive or negative memories.
Subjects: 216 college students (65 males; 142 females; 9 undeclared), average age: 24.6 years (SD = 7.6) participated in a regularly planned classroom demonstration regarding the relationship between posture and mood. As an evaluation of a classroom activity, this report of findings was exempted from Institutional Review Board oversight.
While sitting in a class, students filled out a short, anonymous questionnaire, which asked them to rate their history of depression over the last two years, their level of depression and energy at this moment, and how easy it was for them to change their moods and energy level (on a scale from 1–10). The students also rated the extent they became emotionally absorbed or “captured” by their positive or negative memory recall. Half of the students were asked to rate how they sat in front of their computer, tablet, or mobile device on a scale from 1 (sitting upright) to 10 (completely slouched).
Two different sitting postures were clearly defined for participants: slouched/collapsed and erect/upright as shown in Figure 1. To assume the collapsed position, they were asked to slouch and look down while slightly rounding the back. For the erect position, they were asked to sit upright with a slight arch in their back, while looking upward.
Figure 1. Sitting in a collapsed position and upright position (photo by Jana Asenbrennerova). Reprinted by permission from Gorter and Peper (2011).
After experiencing both postures, half the students sat in the collapsed position while the other half sat in the upright position. While in this position, they were asked to recall/evoke as many hopeless, helpless, powerless, or defeated memories as possible, one after the other, for 30 seconds.
After 30 seconds they were reminded to keep their same position and let go of thinking negative memories. They were then asked to recall/evoke only positive, optimistic, or empowering memories for 30 seconds.
They were then asked to switch positions. Those who were collapsed switched to sitting erect, and those who were erect switched to sitting collapsed. Then they were again asked to recall/evoke as many hopeless, helpless, powerless, or defeated memories as possible one after the other for 30 seconds. After 30 seconds they were reminded to keep their same position and again let go of thinking of negative memories. They were then asked to recall/evoke only positive, optimistic, or empowering memories for 30 seconds, while still retaining the second posture.
They then rated their subjective experience in recalling negative or positive memories and the degree to which they were absorbed or captured by the memories in each position, and in which position it was easier to recall positive or negative experiences.
86% of the participants reported that it was easier to recall/access negative memories in the collapsed position than in the erect position, which was significantly different as determined by one-way ANOVA (F(1,430)=110.193, p < 0.01) and 87% of participants reported that it was easier to recall/access positive images in the erect position than in the collapsed position, which was significantly different as determined by one-way ANOVA (F(1,430)=173.861, p < 0.01) as shown in Figure 2.
Figure 2. Percent of respondents who reported that it was easier to recall positive or negative memories in an upright or slouched posture.
The difficulty or ease of recalling negative or positive memories varied depending on position as shown in Figure 3.
Figure 3. The relative subjective rating in the ease or difficulty of recalling negative and positive memories in collapsed and upright positions.
The participants with a high level of depression over the last two years (top 23% of participants who scored 7 or higher on the scale of 1–10) reported that it was significantly more difficult to change their mood from negative to positive (t(110) = 4.08, p < 0.01) than was reported by those with a low level of depression (lowest 29% of the participants who scored 3 or less on the scale of 1–10). It was significantly easier for more depressed students to recall/evoke negative memories in the collapsed posture (t(109) = 2.55, p = 0.01) and in the upright posture (t(110) = 2.41, p ≦0.05 he) and no significant difference in recalling positive memories in either posture, as shown in Figure 4.
Figure 4. Differences is in memory access for participants with a history of least or most depression.
For all participants, there was a significant correlation (r = 0.4) between subjective energy level and ease with which they could change from negative to positive mood. There were no significance differences for gender in all measures except that males reported a significantly higher energy level than females (M = 5.5, SD = 3.0 and M = 4.7, SD = 3.8, respectively; t(203) = 2.78, p < 0.01).
A subset of students also had rated their posture when sitting in front of a computer or using a digital device (tablet or cell phone) on a scale from 1 (upright) to 10 (completely slouched). The students with the highest levels of depression over the last two years reporting slouching significantly more than those with the lowest level of depression over the last two years (M = 6.4, SD = 3.5 and M = 4.6, SD = 2.6; t(46) = 3.5, p < 0.01).
There were no other order effects except of accessing fewer negative memories in the collapsed posture after accessing positive memories in the erect posture (t(159)=2.7, p < 0.01). Approximately half of the students who also rated being “captured” by their positive or negative memories were significantly more captured by the negative memories in the collapsed posture than in the erect posture (t(197) = 6.8, p < 0.01) and were significantly more captured by positive memories in the erect posture than the collapsed posture (t(197) = 7.6, p < 0.01), as shown in Figure 5.
Figure 5. Subjective rating of being captured by negative and positive memories depending upon position.
Posture significantly influenced access to negative and positive memory recall and confirms the report by Wilson and Peper (2004). The collapsed/slouched position was associated with significantly easier access to negative memories. This is a useful clinical observation because ruminating on negative memories tends to decrease subjective energy and increase depressive feelings (Michi et al., 2015). When working with clients to change their cognition, especially in the treatment of depression, the posture may affect the outcome. Thus, therapists should consider posture retraining as a clinical intervention. This would include teaching clients to change their posture in the office and at home as a strategy to optimize access to positive memories and thereby reduce access or fixation on negative memories. Thus if one is in a negative mood, then slouching could maintain this negative mood while changing body posture to an erect posture, would make it easier to shift moods.
Physiologically, an erect body posture allows participants to breathe more diaphragmatically because the diaphragm has more space for descent. It is easier for participants to learn slower breathing and increased heart rate variability while sitting erect as compared to collapsed, as shown in Figure 6 (Mason et al., 2017).
Figure 6. Effect of posture on respiratory breathing pattern and heart rate variability.
The collapsed position also tends to increase neck and shoulder symptoms This position is often observed in people who work at the computer or are constantly looking at their cell phone—a position sometimes labeled as the i-Neck.
Implication for therapy
In most biofeedback and neurofeedback training sessions, posture is not assessed and clients sit in a comfortable chair, which automatically causes a slouched position. Similarly, at home, most clients sit on an easy chair or couch, which lets them slouch as they watch TV or surf the web. Finally, most people slouch when looking at their cellphone, tablet, or the computer screen (Guan et al., 2016). They usually only become aware of slouching when they experience neck, shoulder, or back discomfort.
Clients and therapists are usually not aware that a slouched posture may decrease the client’s energy level and increase the prevalence of a negative mood. Thus, we recommend that therapists incorporate posture awareness and training to optimize access to positive imagery and increase energy.
Babyak, M., Blumenthal, J. A., Herman, S., Khatri, P., Doraiswamy, M., Moore, K., … Krishnan, K. R. (2000). Exercise treatment for major depression: maintenance of therapeutic benefit at 10 months. Psychosomatic Medicine, 62(5), 633–638.
Canales, J. Z., Cordas, T. A., Fiquer, J. T., Cavalcante, A. F., & Moreno, R. A. (2010). Posture and body image in individuals with major depressive disorder: A controlled study. Revista brasileira de psiquiatria, 32(4), 375–380.
Guan, X., Fan, G., Chen, Z., Zeng, Y., Zhang, H., Hu, A., … He, S. (2016). Gender difference in mobile phone use and the impact of digital device exposure on neck posture. Ergonomics, 59(11), 1453–1461.
Mason, L., Joy, M., Peper, E., & Harvey, R, A. (2017). Posture Matters. Poster presented at the 48th Annual Meeting of the Association for Applied Psychophysiology and Biofeedback, Chicago, IL March, 2017. Abstract published in Applied Psychophysiology and Biofeedback, 42(2), 148.
Michalak, J., Troje, N. F., Fischer, J., Vollmar, P., Heidenreich, T., & Schulte, D. (2009). Embodiment of sadness and depression: Gait patterns associated with dysphoric mood. Psychosomatic Medicine, 71(5), 580–587.
Michl, L. C., McLaughlin, K. A., Shepherd, K., & Nolen-Hoeksema, S. (2013). Rumination as a mechanism linking stressful life events to symptoms of depression and anxiety: Longitudinal evidence in early adolescents and adults. Journal of Abnormal Psychology, 122(2), 339.
Wilkes, C., Kydd, R., Sagar, M., & Broadbent, E. (2017). Upright posture improves affect and fatigue in people with depressive symptoms. Journal of Behavior Therapy and Experimental Psychiatry, 54, 143–149.
We thank Frank Andrasik for his constructive comments.
Through millions of years, movement was part of our biological necessity.. Movement was necessary to hunt, to escape predators, to explore and to find a mate. Organisms developed a brain (nervous system) to coordinate movement as eloquently explain by neuroscientist Daniel Wolpert in his 2011 TED talk, The Real Reasons for Brains.
It is only recently that we limit movement by sitting, driving, taking the escalator, or controlling equipment that performs the actual physical labor. We interfere with our evolutionary developed physiology when we reduce or even eliminate movement for the sake of efficiency. Lack of movement, “sitting disease”, is a significant contributor and causal factor in illness. It also increases the stress response, negative mood and depression and reduces cognitive activity. Take charge and reduce illness when you integrate purposeful exercise (walking, running, dancing, etc.) into your life style.
Exercise is the most effective behavioral technique for self-regulation of mood in healthy people as summarized in the superb article, The Effects of Acute Exercise on Mood, Cognition, Neurophysiology, and Neurochemical Pathways: A Review, Dr. Julia C. Basso and Wendy A. Suzuki of the Center for Neural Science, New York University, New York, NY, USA. The robust research findings show that acute exercise improves mood, significantly reduces depression, tension, anger, fatigue, and confusion. In addition, acute exercise improves symptoms associated with psychological disorders such as depression, anxiety, schizophrenia, and post-traumatic stress disorder. Exercise decreases the risk of type 2 diabetes, coronary heart disease and stress-related blood pressure response by inhibiting the sympathetic nervous system response to stress. For a detailed summary, see the blogs, What is the best single thing we can do for our health and Healthy movement is the new aging.
Finally, the authors also review the relevant neurophysiological, and neurochemical processes that are affected by exercise. What is most interesting are the findings that “acute exercise primarily enhances executive functions dependent on the prefrontal cortex including attention, working memory, problem solving, cognitive flexibility, verbal fluency, decision making, and inhibitory control. These positive changes have been demonstrated to occur with very low to very high exercise intensities, with effects lasting for up to two hours after the end of the exercise bout.”
As the authors state, “We show that the three most consistent cognitive/behavioral effects of a single bout of exercise in humans are improved executive functions, enhanced mood states, and decreased stress levels.”
Even though the findings are clear that movement/exercise is a powerful “drug” to improve our health, most health professionals focus on sitting treatment and prescribing pharmaceutical agents. Possibly, a treatment session should start with fun physical exercise and followed by therapy. Remember, if you feel blah, have lower energy, feel frustrated or irritated, get up and move. Movement and exercise will change your mood. You will experience what Peper and Lin (2012), have shown that less than minute of skipping in place will significantly improve your subjective energy level and mood. Get up and skip in place, then observe how much better you feel. Then sit again read the article by Dr. Julia C. Basso and Wendy A. Suzuki, http://content.iospress.com/download/brain-plasticity/bpl160040?id=brain-plasticity%2Fbpl160040