Knee and Ankle Strength and Lower Extremity Power in Adolescent Female Ballet Dancers

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Abstract

The aims of this study were twofold: 1. to compare the strength of four muscle groups of the lower limb (quadriceps [Q], hamstrings [H], plantar flexors [PF], and dorsiflexors [DF]) between female adolescent ballet dancers (BALs) and basketball players (BBs) over three angular velocities (30°, 60° and 90°/sec) and two types of contraction (eccentric and concentric); and 2. to compare peak and mean power between the BALs and BBs. Eleven BALs (age: 15.8 + 1.2 years; stature: 163.9 ± 6.2 cm; body mass: 56.3 + 5.7 kg; Tanner stage 4: N = 10, stage 5: N = 1) and ten BBs (age: 15.8 + 1.0 years; stature: 172.5 + 5.8 cm; body mass: 63.2 + 10.0 kg; Tanner stage 4: N = 7, stage 5: N = 3) volunteered to participate. Each participant performed one habituation session and one testing session on a Biodex isokinetic dynamometer to determine peak torque. Three angular velocities (30°, 60° and 907sec) were used for each muscle group. To determine absolute and relative peak and mean power, participants performed a 30 second anaerobic Wingate test on a cycle ergometer. There were no significant differences in peak torque for Q, H, PF, and DF between the groups. Basketball players produced greater absolute peak power [569.7 ± 82.2 vs. 454.6 ± 79.3 W (p

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Kenne, E., & Unnithan, V. B. (2008). Knee and Ankle Strength and Lower Extremity Power in Adolescent Female Ballet Dancers. Journal of Dance Medicine and Science, 12(2), 59–65. https://doi.org/10.1177/1089313X0801200204

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