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Showing 3 results for Thoracolumbar
Amir Ali Jafarnezhadgero , Milad Piran Hamlabadi ,
Volume 24, Issue 2 (7-2022)
Abstract
Background and Objective: The use of lumbar braces affects kinetics and kinematics. This study evaluated the effects of two types of simple and sensor thoracolumbosacral braces on electromyography activity of selected muscles in patients with kyphosis during running.
Methods: This quasi-experimental study was performed on 15 males with kyphosis. The subjects performed a running task in three conditions: without braces, with simple braces, and with sensor braces. An 8-channel wireless electromyography system was used to record the activity of the muscles of the lower back and lower limbs during running.
Results: There was no significant difference between the tested conditions in response to loading, middle support and swing; however, during push-off, the median frequency of the gastrocnemius muscle was greater when running with a simple brace compared with running without brace (P<0.05). In addition, the median frequency of the semitendinosus muscle was significantly higher while running with sensor brace compared with simple brace (P<0.05).
Conclusion: Using brace, especially sensor brace, can improve muscle activities in patients with kyphosis.
Milad Piran Hamlabadi , Amir Ali Jafarnezhadgero ,
Volume 24, Issue 3 (10-2022)
Abstract
Background and Objective: One of the ways to correct kyphosis is to use braces. This study was done to determine the effects of two types of simple and sensor thoracolumbosacral braces on ground reaction force components during walking in males with kyphosis.
Methods: In this quasi-experimental study, 15 males with kyphosis did three walking trials on the force platform without a brace, with a simple brace and with a sensor brace. Ground reaction force data were collected using Bertec force plates.
Results: There was no difference in peal forces, free moment and loading rate values during walking with and without braces.
Conclusion: Using a brace does not affect walking kinetics in males with kyphosis.
Milad Piran Hamlabadi , Amir Ali Jafarnezhadgero ,
Volume 25, Issue 3 (10-2023)
Abstract
Background and Objective: Using lumbar orthoses changes the running mechanics. An essential biomechanical factor in rehabilitation and injury prevention is the co-contraction of the knee and ankle joints. Therefore, this study aimed to investigate the effect of 2 types of thoracolumbosacral braces on ankle and knee joint co-contraction in people with kyphosis during running.
Methods: This quasi-experimental study was conducted on 15 men aged 18-25 years suffering from kyphosis greater than 40 degrees in the Biomechanics Laboratory of the University of Mohaghegh Ardabili Health Center during the summer of 2020. Each participant randomly performed 3 running tests in each condition: without a brace, with a sensor brace, and with a simple brace. The test consisted of electromyographic data of the selected lower limb muscles, which also recorded the contraction of the knee and ankle muscles in the right leg when running at a constant speed.
Results: The results showed a reduction of the general knee co-contraction while using a sensory brace compared to without the brace by 6% during the loading phase (P<0.05). Additionally, using a simple brace compared to the condition without a brace, the ankle-directed contraction during the push-off phase decreased by 38% (P<0.05). Directed vastus medialis and lateralis co-contraction while using a sensory brace increased by about 49% compared to without the brace at the loading phase and increased by about 47% at the mid-stance phase without a brace condition compared to the simple brace condition (P<0.05).
Conclusion: General knee co-contraction after using a sensory brace was lower than when a simple brace was used.
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