Knee and ankle strength and lower extremity power in adolescent female ballet dancers

Ellinor Kenne, Viswanath B. Unnithan

Research output: Contribution to journalArticle

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 90°/sec) 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 < .05)], relative peak power [9.1 ± 1.3 vs. 8.1 ± 1.0 W/kg body mass (p < .05)], absolute mean power [428.4 ± 53.9 vs. 333.7 ± 68.2 W (p < .05)] and relative mean power [6.83 ± 0.7 vs. 5.9 ± 0.7 W/kg (p < .05)] than BALs. Ballet dancers and BBs had similar isokinetically measured lower extremity muscular strength, but BALs generated lower levels of peak power and mean power compared to BBs.
Original languageEnglish
Pages (from-to)59-65
Number of pages7
JournalJournal of Dance Medicine & Science
Volume12
Issue number2
Publication statusPublished - 1 Jun 2008

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Dimercaprol
Ankle
Lower Extremity
Knee
Basketball
Torque
Muscle Strength
Muscles

Cite this

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title = "Knee and ankle strength and lower extremity power in adolescent female ballet dancers",
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 90°/sec) 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 < .05)], relative peak power [9.1 ± 1.3 vs. 8.1 ± 1.0 W/kg body mass (p < .05)], absolute mean power [428.4 ± 53.9 vs. 333.7 ± 68.2 W (p < .05)] and relative mean power [6.83 ± 0.7 vs. 5.9 ± 0.7 W/kg (p < .05)] than BALs. Ballet dancers and BBs had similar isokinetically measured lower extremity muscular strength, but BALs generated lower levels of peak power and mean power compared to BBs.",
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Knee and ankle strength and lower extremity power in adolescent female ballet dancers. / Kenne, Ellinor; Unnithan, Viswanath B.

In: Journal of Dance Medicine & Science, Vol. 12, No. 2, 01.06.2008, p. 59-65.

Research output: Contribution to journalArticle

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AB - 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 90°/sec) 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 < .05)], relative peak power [9.1 ± 1.3 vs. 8.1 ± 1.0 W/kg body mass (p < .05)], absolute mean power [428.4 ± 53.9 vs. 333.7 ± 68.2 W (p < .05)] and relative mean power [6.83 ± 0.7 vs. 5.9 ± 0.7 W/kg (p < .05)] than BALs. Ballet dancers and BBs had similar isokinetically measured lower extremity muscular strength, but BALs generated lower levels of peak power and mean power compared to BBs.

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