While walking on split-belt treadmills (two belts running at different speeds), the slower limb shows longer anterior steps than the limb dragged by the faster belt. After returning to basal conditions, the step length asymmetry is transiently reversed (after-effect). The lower limb joint dynamics, however, were not thoroughly investigated. In this study, 12 healthy adults walked on a force-sensorised split-belt treadmill for 15 min. Belts rotated at 0.4 m s−1 on both sides, or 0.4 and 1.2 m s−1 under the non-dominant and dominant legs, respectively. Spatiotemporal step parameters, ankle power and work, and the actual mean velocity of the body’s centre of mass (CoM) were computed. On the faster side, ankle power and work increased, while step length and stance time decreased. The mean velocity of the CoM slightly decreased. As an after-effect, modest converse asymmetries developed, fading within 2–5 min. These results may help to decide which belt should be assigned to the paretic and the unaffected lower limb when split-belt walking is applied for rehabilitation research in hemiparesis.

Dynamic asymmetries do not match spatiotemporal step asymmetries during split-belt walking / S. Scarano, L. Tesio, V. Rota, V. Cerina, L. Catino, C. Malloggi. - In: SYMMETRY. - ISSN 2073-8994. - 13:6(2021 Jun 19), pp. 1089.1-1089.16. [10.3390/sym13061089]

Dynamic asymmetries do not match spatiotemporal step asymmetries during split-belt walking

S. Scarano
Primo
;
L. Tesio
Secondo
;
V. Rota;L. Catino
Penultimo
;
2021-06-19

Abstract

While walking on split-belt treadmills (two belts running at different speeds), the slower limb shows longer anterior steps than the limb dragged by the faster belt. After returning to basal conditions, the step length asymmetry is transiently reversed (after-effect). The lower limb joint dynamics, however, were not thoroughly investigated. In this study, 12 healthy adults walked on a force-sensorised split-belt treadmill for 15 min. Belts rotated at 0.4 m s−1 on both sides, or 0.4 and 1.2 m s−1 under the non-dominant and dominant legs, respectively. Spatiotemporal step parameters, ankle power and work, and the actual mean velocity of the body’s centre of mass (CoM) were computed. On the faster side, ankle power and work increased, while step length and stance time decreased. The mean velocity of the CoM slightly decreased. As an after-effect, modest converse asymmetries developed, fading within 2–5 min. These results may help to decide which belt should be assigned to the paretic and the unaffected lower limb when split-belt walking is applied for rehabilitation research in hemiparesis.
asymmetry; rehabilitation; split-belt treadmill; walking
Settore MED/34 - Medicina Fisica e Riabilitativa
https://www.mdpi.com/2073-8994/13/6/1089
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/857504
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