Muscle Strength Clinical Trial
Official title:
Evaluation of Foot Posture, Muscle Strength, Functional Performance, and Postural Control in Children With Isolated Gastrocnemius Tightness
Studies on gastrocnemius tightness in healthy children are limited, but there is evidence that ankle dorsiflexion decreases with increasing age in children. It is not known whether gastrocnemius tightness is a normal finding in children, but recurrent leg pain is common in children. It is also known that flexible flatfoot is a normal observation in developing children and that the medial longitudinal arch develops during the first decade of life. Both foot morphology and ankle dorsiflexion change in developing children; however, it is not known whether there is a relationship between them or not. In the literature, there is no study evaluating foot posture, muscle strength, functional performance, and postural control in children with isolated gastrocnemius muscle tightness. It was planned to evaluate postural control using computerized dynamic posturography (Biodex Balance System), lower extremity muscle strength using a hand-held dynamometer, foot posture using the Foot Posture Index (FPI-6), and functional performance using single-foot-double-foot jump tests in healthy children with isolated gastrocnemius muscle tightness.
Since the gastrocnemius muscle spans both joints, the kinematics of the ankle joint are influenced by knee flexion. According to Kendall & McCreary's assessment of normal joint motion angles, when the knee joint is in extension, the passive dorsiflexion angle of the ankle is approximately 20°, and with knee flexion, the angle can approach 30° due to the relaxation of the gastrocnemius. During the midstance phase of walking, the ankle joint allows for 8-10° of dorsiflexion movement. The evaluation of gastrocnemius muscle tightness is conducted using the Silfverskiold method. However, there are variations in the definitions proposed for the detection of isolated gastrocnemius tightness. In our investigation, when ankle dorsiflexion rises by at least 10° more in knee flexion than knee extension, isolated gastrocnemius tightness will be taken into account. Isolated gastrocnemius tightness during walking can result in compensatory effects on the lower extremity and foot, causing biomechanical changes such as pes planus, talus eversion, rearfoot pronation, and various symptoms such as plantar fasciitis, leg pain, metatarsalgia, and Achilles tendinopathy. The association between increased rearfoot pronation and isolated gastrocnemius tightness has been demonstrated in the literature. Regardless of the etiology of rearfoot pronation, adaptive isolated gastrocnemius shortening will occur in conjunction with talar plantar flexion. Isolated gastrocnemius tightness causing plantar flexion at the ankle joint and pronation at the subtalar joint also hinders the normal distribution of load on the plantar surface during weight-bearing. Reviewing the literature, it is observed that the effects of isolated gastrocnemius tightness on foot posture, functional parameters, and gait dynamics, especially rearfoot pronation, are reported. Studies on gastrocnemius tightness in healthy children are limited, but there is evidence that ankle dorsiflexion decreases with age in children. While it is unknown whether gastrocnemius shortening is a normal finding in children, recurrent leg pain is common in children. Additionally, flexible flatfoot is considered a normal observation in developing children, and it is known that the medial longitudinal arch develops in the first ten years of life. Both foot morphology and ankle dorsiflexion change in developing children, but it is unknown whether there is a relationship between the two. In the literature, there is no study evaluating foot posture, muscle strength, functional performance, and postural control in children with isolated gastrocnemius muscle shortening. In our study, we plan to assess postural control using computerized dynamic posturography (Biodex Balance System), lower extremity muscle strength using a hand-held dynamometer, foot posture using the Foot Posture Index (FPI-6), and functional performance using single-leg and double-leg hop tests in healthy children with isolated gastrocnemius muscle shortening. ;
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