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Aiming to determine the association between joint range of motion (ROM) and muscle strength; and, the effect of age and menarche on those two factors; 132 pre-and post-menarche dancers, aged 12–14 years were assessed for joint ROM and for muscle strength at the hip, knee and ankle and foot joints.  En-pointe  ROM was significantly correlated with ankle plantar-flexors’ (r = −.184) and with ankle dorsiflexors’ muscle strength (r = −.221). Hip external rotation ROM was significantly correlated with knee extensors’ strength (r = −.263). Pre-menarche dancers had higher joint ROM compared with post-menarche dancers; yet, dancers at post-menarche were stronger compared to dancers at pre-menarche. The slope coefficient was negative at the age of 12 in hip external rotation and in  en-pointe  (−0.80 and −0.52, respectively) and became steeper with age (age 13: −3.52 and −3.28, respectively; age 14: −6.31 and −4.42, respectively). Along maturation, dancers with high joints ROM showed reduced muscle strength. Pre-menarche dancers have higher joint ROM, yet reduced muscle strength, compared with post-menarche dancers. As the association between joint ROM and muscle strength might be involved with growth and development, young dancers should be screened along pubertal stages in order to decide the correct curricula and to prevent future injuries.

research in sports medicine

Is there an association between joint range of motion and muscle strength in young female dancers? And, does it depend on the effects of age and menarche?