Medical Problems of Performing ArtistsMedical Problems of Performing Artists

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Achilles and Patellar Tendon Morphology in Dancers with and without Tendon Pain

Kornelia Kulig, Kari C. Oki, Yu-Jen Chang, Gregory R. Bashford
From: Medical Problems of Performing Artists: Volume 29 Number 4: Page 221 (December 2014)

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Abstract: OBJECTIVES: To examine Achilles and patellar tendon morphology in dancers with and without tendon pain. METHODS: 53 dancers with and without Achilles and/or patellar tendon pain participated. Eleven age-matched non-dancers served as controls. Longitudinal ultrasound images of the middle and distal Achilles and proximal and distal patellar tendons were acquired. To assess macromorphology, the thickness of the middle and distal Achilles and proximal and distal patellar tendons were measured. Micromorphology was analyzed by selecting 2 x 2-mm2 regions of interest in the tendons; spectral analysis using the fast Fourier transform was run for several kernels (2 x 2-mm2 subimages) within each image, and the peak spatial frequency (PSF) was extracted. A one-way ANOVA compared asymptomatic, symptomatic, and control tendon thickness and PSF. RESULTS: Macromorphology: There was no significant difference between asymptomatic and symptomatic dancers in middle or distal Achilles tendon thickness and distal patellar tendon thickness. Proximal patellar tendons in control subjects were thinner than those in asymptomatic (p=0.036) and symptomatic (p=0.003) dancers. Micromorphology: There was no significant difference in PSF between asymptomatic and symptomatic dancers and controls in the Achilles or patellar tendon. CONCLUSION: Increased proximal patellar tendon thickness without changes in tendon micromorphology suggests that tendon adaptations are more likely activity-related and less likely influenced by degeneration.
https://doi.org/10.21091/mppa.2014.4044

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