Anterior knee laxity in young women varies with their menstrual cycle

Abstract

We studied 16 women 21-23 years old with regular menstrual cycles (28±4 days) and no history of knee injury. From their basal body temperatures and the serum concentrations of estradiol and progesterone, the follicular, ovulatory, and luteal phases were delineated. Using a KT-2000 arthrometer, anterior displacement at 89 N and 134 N and anterior terminal stiffness (N/mm) at 134 N were measured two or three times every week over a 4-week period. Eight men 21-23 years old were also measured. In women the anterior displacement at 89 N varied between the follicular and the ovulatory phase and between the follicular and the luteal phase (P<0.05) and at 134 N between the follicular and the luteal phase (P<0.05). There were no statistical differences in the anterior displacement with time in men, nor in anterior terminal stiffness in either sex. We conclude that anterior cruciate ligament laxity in women might be dependent on the concentrations of hormones. et à 134 N entre la phase folliculaire et lutéale (p<0,05). Il n'y avait pas de différences statistiques dans le déplace-ment antérieur chez les hommes, ni dans la raideur terminale antérieure dans l'un et l'autre sexe. Nous concluons que la laxité du ligament croisé antérieur chez la femme peut être dépendante des concentrations hormonales. Résumé

Does Anteromedial Portal Drilling Improve Footprint Placement in Anterior Cruciate Ligament Reconstruction?

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“…Findings of studies on the effects of the menstrual cycle on knee joint laxity are summarized in Figure 1. Five of the eleven studies observed significant associations between the menstrual cycle and anterior knee laxity and all five reported that laxity increased during the ovulatory or luteal phases of the cycle [75][76][77][78][79][80]. Furthermore, a meta-analysis of nine studies found that anterior knee laxity was greater in the ovulatory phase than in the luteal phase and was lowest in the follicular phase [81].…”

Sex Hormones and Neuromuscular Control System

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