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P6

CROSS-SECTIONAL AREA OF THE ACHILLES TENDON IN YOUNG

AND ELDERLY WOMEN

Heidi Abrahamsen, Nina Beyer, Kirsten Neergaard, Michael Kjaer, Per Aagaard, S

Peter Magnusson

Sports Medicine Research Center / Team Danmark Test Center, Dept. Radiology, Bispebjerg

Hospital, Copenhagen

INTRODUCTION: The aging process is reportedly associated with connective

tissue changes, although no data exists to substantiate such changes in elderly

women. The present study investigated the effect of age on the crosssectional

area (CSA) of the Achilles tendon.

METHODS: The CSA was obtained with MRI in young (Y) healthy untrained

women (n=9, age=290.7 yrs (meanSE)) and elderly (E) healthy untrained women

(n=10, 79.41.9 yrs). Mean CSA was obtained from 3 measures 3 cm proximal

to the Achilles tendon insertion. CV for the measures was 3.4 %. Achilles

tendon force was obtained from maximal isometric ankle moment and moment

arm data from MRI. Pearson correlation coefficients and unpaired t-tests

were used for statistical evaluation.

RESULTS: (meanSE) Y and E did not differ in height (Y: 1673 cm, E: 1633 cm)

or weight (Y: 71.34.4 kg, E: 62.13.6 kg). Achilles tendon CSA was greater in E

(56.3+3.0 mm 2 ) compared to Y (46.0+ 1.9 mm 2 ), P 0.01. Tendon force was greater

in Y (1930393 N) compared to E (982107 N), P

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