Change in Gastrocnemius Pennation Angle According to Ankle Dorsiflexion among University Students

Title & Authors
Change in Gastrocnemius Pennation Angle According to Ankle Dorsiflexion among University Students
Kim, Ji-Seon; Seo, Byoung-Do; Shin, Hyung-Soo; Shin, Hee-Joon; Ju, Joung-Youl;

Abstract
This study aimed to investigate the influence of the ankle dorsiflexion angle ($\small{0^{\circ}}$, $\small{10^{\circ}}$, and $\small{20^{\circ}}$) on the effectiveness of gastrocnemius stretching angle. The subjects of this study were 25 young man and female women. In all participants, the pennation angle of the medial head of the gastrocnemius was evaluated using ultrasonography at an ankle dorsiflexion angle of $\small{0^{\circ}}$, $\small{10^{\circ}}$, or $\small{20^{\circ}}$. Repeated measures analysis of variance was uesd to test for differences between ankle dorsiflexion angles. The independent t-test was performed to determine the significance of sex differences. The results of this study showed that the gastrocnemius pennation angle decreased as the ankle dorsiflexion angle increased, with significant interaction between each angle of ankle dorsiflexion angle (p<0.01). Sex comparison showed that the pennation angle was greater in man than in women, but the difference was not significant (p>0.05). According to the sex the gastrocnemius pennation angle is decreased as the ankle dorsiflexion angle increased (p<0.01). These results suggest that the end range of dorsiflexion is more beneficial for gastrocnemius stretching than a small range. Further studies are needed to investigate the influence of other factors, such as stretching angle and application time, on gastrocnemius stretching.
Keywords
Dorsiflexion Angle;Gastrocnemius;Pennation Angle;Stretch;Ultrasonography;
Language
Korean
Cited by
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