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Walking and postural balance are extremely important to obtain food and to work. Both are critical for quality of life and ability to survive. While walking reflects musculoskeletal and cardiopulmonary systems, postural balance depends on body size, muscle tone, visual, vestibular and nervous systems. Since GH and IGF-I act on all these systems, we decided to study those parameters in a cohort of individuals with severe short stature due to untreated isolated GH deficiency (IGHD) caused by a mutation in the GHRH receptor gene. These IGHD subjects, despite reduction in muscle mass, are very active and have normal longevity.
In a cross-sectional study, we assessed walking (by a 6-min walk test), postural balance (by force platform) and fall risk (by the 'Timed Up and Go' test) in 31 IGHD and 40 matched health controls.
The percentage of the walked distance measured in relation to the predicted one was similar in groups, but higher in IGHD, when corrected by the leg length. Absolute postural balance data showed similar velocity of unipodal support in the two groups, and better values, with open and closed eyes and unipodal support, in IGHD, but these differences became non-significant when corrected for height and lower-limb length. The time in 'Timed Up and Go' test was higher in IGHD cohort, but still below the cut-off value for fall risk.
IGHD subjects exhibit satisfactory walking and postural balance, without increase in fall risk.
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Santana-Ribeiro, Ananda A.; Moreira-Brasileiro, Giulliana A.; Aguiar-Oliveira, Manuel H.; Salvatori, Roberto; Carvalho, Vitor O.; Alvim-Pereira, Claudia K.; Araujo-Daniel, Carlos R.; Reis-Costa, Julia G.; Andrade-Guimaraes, Alana L.; Oliveira-Santos, Alecia A.; Vieira, Edgar; and Gois-Junior, Miburge B., "Walking and postural balance in adults with severe short stature due to isolated GH deficiency" (2019). Department of Physical Therapy Faculty Publications. 10.
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