Six weeks of intensive rehearsals for the Swan Lake ballet shows ultrasound tissue characterization changes of the Achilles tendons in dancers
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Six weeks of intensive rehearsals for the Swan Lake ballet shows ultrasound tissue characterization changes of the Achilles tendons in dancers. / Anker-Petersen, Charlotte; Juul-Kristensen, Birgit; Antflick, Jarrod; Aagaard, Henrik; Myers, Christopher; Boesen, Anders Ploug; Boyle, Eleanor; Hölmich, Per; Thorborg, Kristian.
I: Scandinavian Journal of Medicine and Science in Sports, Bind 31, Nr. 11, 2021, s. 2133-2143.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Six weeks of intensive rehearsals for the Swan Lake ballet shows ultrasound tissue characterization changes of the Achilles tendons in dancers
AU - Anker-Petersen, Charlotte
AU - Juul-Kristensen, Birgit
AU - Antflick, Jarrod
AU - Aagaard, Henrik
AU - Myers, Christopher
AU - Boesen, Anders Ploug
AU - Boyle, Eleanor
AU - Hölmich, Per
AU - Thorborg, Kristian
N1 - Publisher Copyright: © 2021 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
PY - 2021
Y1 - 2021
N2 - The objective was to investigate, first, whether six weeks of intensive ballet dance exposure is associated with structural and clinical changes in the Achilles tendon; second, the importance of demographics, self-reported Achilles pain, and generalized joint hypermobility (GJH). Data were collected at baseline and at six weeks’ follow-up, using Achilles tendon ultrasound tissue characteristics (UTC) as primary outcome (percentage distribution of echo-type I–IV: type I = intact and aligned bundles, type II = discontinuous/wavy bundles, type III = fibrillar, and type IV = amorphous cells/fluid). Secondary outcomes included clinical signs of Achilles tendinopathy, Achilles tendon pain during single-leg heel raise, self-reported symptoms (VISA-A questionnaire), and GJH. Sixty-three ballet dancers (aged 18–41) participated. From baseline to follow-up, UTC echo-type I decreased significantly (β = −3.6, p = 0.001; 95% CI: −5.8;−1.4), whereas echo-type II increased significantly (β = 3.2, p < 0.0001, 95% CI: 1.6;4.8). Furthermore, a significant effect of limb (left limb showed decreased echo-type I and increased echo-type III + IV) and sex (women showed decreased echo-type I and increased in type II) was found. No significant changes in the remaining secondary outcomes were found. Ballet dancers showed structural changes in UTC, corresponding to a decreased echo-type I distribution after six weeks of rehearsing for Swan Lake ballet. No changes in self-reported symptoms, clinical signs of Achilles tendinopathy, and single-leg heel raise test were seen from pre- to post-rehearsal. Thus, UTC changes in the Achilles tendon seem to appear earlier than clinical signs of tendinopathy.
AB - The objective was to investigate, first, whether six weeks of intensive ballet dance exposure is associated with structural and clinical changes in the Achilles tendon; second, the importance of demographics, self-reported Achilles pain, and generalized joint hypermobility (GJH). Data were collected at baseline and at six weeks’ follow-up, using Achilles tendon ultrasound tissue characteristics (UTC) as primary outcome (percentage distribution of echo-type I–IV: type I = intact and aligned bundles, type II = discontinuous/wavy bundles, type III = fibrillar, and type IV = amorphous cells/fluid). Secondary outcomes included clinical signs of Achilles tendinopathy, Achilles tendon pain during single-leg heel raise, self-reported symptoms (VISA-A questionnaire), and GJH. Sixty-three ballet dancers (aged 18–41) participated. From baseline to follow-up, UTC echo-type I decreased significantly (β = −3.6, p = 0.001; 95% CI: −5.8;−1.4), whereas echo-type II increased significantly (β = 3.2, p < 0.0001, 95% CI: 1.6;4.8). Furthermore, a significant effect of limb (left limb showed decreased echo-type I and increased echo-type III + IV) and sex (women showed decreased echo-type I and increased in type II) was found. No significant changes in the remaining secondary outcomes were found. Ballet dancers showed structural changes in UTC, corresponding to a decreased echo-type I distribution after six weeks of rehearsing for Swan Lake ballet. No changes in self-reported symptoms, clinical signs of Achilles tendinopathy, and single-leg heel raise test were seen from pre- to post-rehearsal. Thus, UTC changes in the Achilles tendon seem to appear earlier than clinical signs of tendinopathy.
KW - dance
KW - diagnostic imaging
KW - physical activity
KW - tendinopathy
U2 - 10.1111/sms.14034
DO - 10.1111/sms.14034
M3 - Journal article
C2 - 34407248
AN - SCOPUS:85113588331
VL - 31
SP - 2133
EP - 2143
JO - Scandinavian Journal of Medicine & Science in Sports
JF - Scandinavian Journal of Medicine & Science in Sports
SN - 0905-7188
IS - 11
ER -
ID: 304877987