Resumen:
Common psychological factors, such as anxiety or neurotic personality traits, seem to be associated with pain suffered by athletes. Gastrocnemius muscles present a high prevalence for injury in athletes. These muscles are a region in which myofascial pain syndrome (MPS) frequently develops. Myofascial pain syndrome is characterized by the presence of active myofascial trigger points (MTrPs). This study compared different personality and anxiety symptoms between athletes with and without active MTrPs in the gastrocnemius. A case-control study was conducted in an outpatient clinic. Athletes who performed moderate or vigorous physical activity according to the International Physical Activity Questionnaire were included. Fifty paired-matched athletes with and without active MTrPs in their gastrocnemius muscles (n = 25 in each group) were recruited. Different personality traits (neuroticism, extraversion, psychoticism, and sincerity) and anxiety (state and trait) were evaluated by the Eysenck Personality Questionnaire and State-Trait Anxiety Inventory, respectively. Statistically significant differences (p < 0.01) with an effect size from moderate to large (d = 0.75–1.29) were found for greater neurot...