Objective: The purpose of this study was to provide data on gait characteristics of K-pop professional dancers. Method: Participants were divided into four groups: male dancers (n=10, age: $28.2{\pm}3.4years$, height: $175{\pm}6cm$, weight: $68.9{\pm}5.6kg$), female ...
Objective: The purpose of this study was to provide data on gait characteristics of K-pop professional dancers. Method: Participants were divided into four groups: male dancers (n=10, age: $28.2{\pm}3.4years$, height: $175{\pm}6cm$, weight: $68.9{\pm}5.6kg$), female dancers (n=10, age: $26.7{\pm}3.1years$, height: $162{\pm}4cm$, weight: $52.1{\pm}3.7kg$), non-dancer males (n=10, age: $25.2{\pm}2.6years$, height: $171{\pm}6cm$, weight: $66.4{\pm}5.3kg$), or non-dancer females (n=10, age: $26.2{\pm}3.0years$, height: $161{\pm}5cm$, weight: $56.4{\pm}6.7kg$). Twelve infrared cameras (Qualisys, Oqus 500, Sweden, 150 Hz.) were used to capture three-dimensional motion data. Gait motion data of professional dancers and ordinary persons were obtained. Results: K-pop dancers' dynamic stability during the female toe off event and the male heel contact event was better compared with that of ordinary persons in the front-rear direction. In addition, the results showed a significant difference in the margin of stability (MoS). However, the medial-lateral direction of both female and male dancers during heel contact and the toe off event was more stable compared with ordinary person, who exhibited an increased MoS than did the dancers. Conclusion: This study aimed to investigate the gait characteristics of K-pop professional dancers in comparison with ordinary persons using gait parameters and MoS. The stability of K-pop professional dancers' dynamic gait in the front-rear direction was better than that in the medial-lateral direction. Therefore, further studies in which the dance movements of K-pop dancers are sub-divided and analyzed will be necessary to reduce related injury.
Objective: The purpose of this study was to provide data on gait characteristics of K-pop professional dancers. Method: Participants were divided into four groups: male dancers (n=10, age: $28.2{\pm}3.4years$, height: $175{\pm}6cm$, weight: $68.9{\pm}5.6kg$), female dancers (n=10, age: $26.7{\pm}3.1years$, height: $162{\pm}4cm$, weight: $52.1{\pm}3.7kg$), non-dancer males (n=10, age: $25.2{\pm}2.6years$, height: $171{\pm}6cm$, weight: $66.4{\pm}5.3kg$), or non-dancer females (n=10, age: $26.2{\pm}3.0years$, height: $161{\pm}5cm$, weight: $56.4{\pm}6.7kg$). Twelve infrared cameras (Qualisys, Oqus 500, Sweden, 150 Hz.) were used to capture three-dimensional motion data. Gait motion data of professional dancers and ordinary persons were obtained. Results: K-pop dancers' dynamic stability during the female toe off event and the male heel contact event was better compared with that of ordinary persons in the front-rear direction. In addition, the results showed a significant difference in the margin of stability (MoS). However, the medial-lateral direction of both female and male dancers during heel contact and the toe off event was more stable compared with ordinary person, who exhibited an increased MoS than did the dancers. Conclusion: This study aimed to investigate the gait characteristics of K-pop professional dancers in comparison with ordinary persons using gait parameters and MoS. The stability of K-pop professional dancers' dynamic gait in the front-rear direction was better than that in the medial-lateral direction. Therefore, further studies in which the dance movements of K-pop dancers are sub-divided and analyzed will be necessary to reduce related injury.
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제안 방법
Human coordinates were set according to the marker set of Visual 3D, and three-dimensional (3D) images were obtained. In order to acquire data on the usual gait motions of 20 ordinary persons and 20 professional dancers, they were asked to walk three times along a 9-m-long runway at a self- preferred speed without controlling gait speed.
, USA), an application program, variables were derived. In order to evaluate gait stability in the subjects, data on the base of support (BoS) in gait motion, the position of the center of mass (PCoM), the velocity of the center of mass (VCoM), extrapolated center of mass (XCoM) and the margin of stability (MoS) were used (Figure 1). Gait para meters (cadence: number of steps per min, step length: length from the heel of the back foot to the heel of the front foot, step width: right and left length of the right foot and left foot, swing time: swing phase time, double limb support time, speed: gait speed) were compared between the groups.
Studies on K-pop dancers are scarce, despite South Korea being the birthplace of K-pop, which prompts researchers to proactively provide relevant biomechanical information (Jang, Hong & Kim, 2016). Therefore, the present study sought to investigate differences in gait stability between K-pop professional dancers as well as ordinary persons and, thus, to evaluate gait stability in professional dancers.
대상 데이터
After receiving consent from the subjects, the present study was conducted. Twelve infrared cameras (Oqus-5, Qualisys, Sweden) were used to analyze gait movementrelated data. Human coordinates were set according to the marker set of Visual 3D, and three-dimensional (3D) images were obtained.
성능/효과
The results of the present study showed that MoS at heel contact in the anterior-posterior direction was greater in male dancers > female dancers > females > males, while MoS at toe off was greater in female dancers > male dancers > males > females, thereby indicating that professional dancers might walk more stably compared with ordinary persons.
PCoM was the smallest in male dancers, but it was not statistically significant. There was no statistically significant difference in mean VCoM and XCoM between the four groups, but mean VCoM and XCoM were greater in ordinary subjects than in dancers. There was a statistically significant difference in MoS between the four groups (p =.
후속연구
Therefore, further studies are needed to systemically subdivide and analyze K-pop dancers' movements and investigate their characteristics in depth.
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