Altered Postural Control during the Luteal Phase in Women with Premenstrual Symptoms

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Abstract
The purpose of this study was to investigate postural control in women with and without premenstrual symptoms (PMS) in three hormonally verified phases of the menstrual cycle. Thirty-two women were recruited to participate in the study and 25 of these women were included in the results. Menstrual cycle phases were determined by sex hormone analyses in serum and LH detection in urine. A prospective rating of PMS was used to divide the subjects into two groups: one with PMS (cyclic) and one without (non-cyclic). For measurement of postural control, subjects stood on a force platform (AMTI) in two-legged stance (eyes open and closed) and one-legged stance (eyes open and closed). There were no significant differences in the two-legged stance between the phases of the menstrual cycle or between groups. In one-legged stance with eyes open, there was a significant increase in postural displacement in the mid-luteal phase in the cyclic group, but no differences were detected between phases in the non-cyclic group. These findings may be related to the previously reported increased injury rate and psychomotor slowing in the luteal phase in women with PMS.