72 Somatization and Headaches in people with insomnia during the COVID-19 Pandemic: the benefit of exercise.
Authors: Henderson-Arredondo Kymberly , Jankowski Samantha , Suckow Emmett , Desai Shivani , Reich-Fuehrer Melissa , Hildebrand Lindsey , Killgore William D.S. 
Published: December 2023

Objective:

Stress is well known to increase the severity of somatization and insomnia. A recent major stressor that could have influenced the severity of these presentations was world-wide COVID-19 Pandemic. Somatization is the physical expression of stress and emotional distress that can manifest itself throughout various corporal domains and can be a comorbidity to insomnia. Headaches represent some of the most common complaints associated with brain injuries and neurological disorders but are common in somaticized disorders as well. In large survey study we examined whether exercise was associated with severity of somatization and headaches. We hypothesized that both healthy individuals and those with insomnia who exercised during the pandemic would report less severe somatic symptoms and headaches than those who did not.

Participants and Methods:

A large survey was sent out to 4,073 individuals to measure their experience in numerous domains during the COVID-19 pandemic. This survey included a short symptom questionnaire used to measure somatization and the Insomnia Scale Index to measure insomnia. These questionnaires were administered along with a “yes or no” question on whether the participants exercised regularly in that period. A univariate ANOVA was performed to analyze the data to determine if exercise during the pandemic was beneficial in the reduction of somatic symptoms and headache severity. Furthermore, these tests were run to determine if the effect was greater on those with insomnia.

Results:

The effect of insomnia and exercise on total somatic symptoms were significant at F(1, 3445)=650.5, p<0.001 and F(1, 3445)=26.1, p<0.001, respectively. For reported headache severity, there was a significant effect of exercise F(1, 4073)=14.5, p<0.001 and insomnia F(1, 4073)=160.5, p<0.001; therefore, those who exercised reported less severe headaches and those who suffered from insomnia reported more severe somatic symptoms. This meant that those who exercised reported less severe somatization and headaches than those who didn’t and those with insomnia reported more severe somatization and headaches than healthy individuals. However, the interaction between exercise and insomnia on overall somatization severity was not significant at F(1, 3445)=3.4, p=0.066 nor for reported headache severity F(1, 4073)=0.81, p=0.370. Despite there not being a significant interaction, the benefit of exercise was slightly greater on healthy individuals than those with insomnia.

Conclusions:

Those with insomnia reported more severe headaches and overall somatic symptoms than non-insomniacs regardless of whether they exercised or not. Exercise did make a difference on the reported severity of headaches and somatization in both groups; however, the benefit of exercise on headaches and somatization was greater in individuals who do not suffer from insomnia. Thus, exercise was noted to be beneficial to those in the general population and those suffering from insomnia as it can potentially reduce the severity of somatization and headaches. Of course, this research was cross sectional and correlational, so the directionality of the effects cannot be inferred. For future research, it would be instrumental to use experimental methods to help determine the duration and type of exercise that may optimize its potential benefits on headaches and somatic symptoms.