• 한국융합학회논문지
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• 제9권11호
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• pp.465-477
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• 2018

본 연구의 목적은 3주간의 고지대 스키 트레이닝이 크로스컨트리 스키 선수의 근기능에 미치는 영향을 분석하여 향후 크로스컨트리 스키 선수들의 근기능 향상 및 과학적 훈련프로그램 구성을 위한 기초 자료를 제공하는데 있다. 연구대상자는 크로스컨트리 스키 남자 대학 선수 6명을 대상으로 실시하였으며, 주기별과 고지대 트레이닝이 크로스컨트리 스키 선수들에 미치는 영향을 확인하기 위하여 일반선형모델 반복측정(General Linear Model ANOVA with repeated measure)과 대응표본 t 검정(Paired Samples t-test)을 적용하여 분석하였다. 고지대 스키 트레이닝을 3주간 실시한 결과 신체조성은 변화가 나타나지 않았지만, 어깨관절, 허리관절, 무릎관절, 발목관절의 등속성 근기능이 감소되는 것을 확인할 수 있었다. 따라서 SP기간과 같은 스키 트레이닝 기간 중에도 지속적인 근력훈련을 실시하여야 할 것으로 사료되면 이에 대한 추가 연구가 필요할 것으로 판단된다.

• 한국운동역학회지
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• 제22권1호
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• pp.95-104
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• 2012

The purpose of this study targeted to national cross-country skiers representatives was to implement hypothetical experiment on their patterns of the movements and analysis on kinematic variables occurred while double polling was conducted between starting and finishing phase of 56 meters. Furthermore, it aimed to provide a set of quantitative data to illustrate how to improve one's skill and performance of sprint. In our experiments, we conducted 3-dimension analysis of cycle characteristics, joint angle(hip, knee and elbow), and pole angle. The results showed that at the starting phase, the players did not show a significant difference in attributes of time and distance. In heat 1 where elbow angle and polling starts, the pole angle was noticeably high in heat 1. At the finishing phase, there was a considerable distinction with a high frequency in performing a short polling time and high speed in heat 3. The players showed large extension between the flexion and of the hip angle which indicates high contribution given from the movement of lower body(hip, knee).

• 한국운동역학회지
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• 제21권3호
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• pp.259-268
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• 2011

This study aimed to examine the kinematic characteristics of the national elite cross-country skiers' double poling technique and to provide the quantitative data for better performance. Four male elite cross-country roller skiers skied maximum velocity with Double Pole technique. The cycle characteristics with angles of elbow, hip, and knee joint were analyzed. The results showed that CM velocity of the body was increased with the third cycle, the cycle time and length were also increased. The poling time and recovery time rate showed with 32.79%, 67.44% respectively. The joint angles with elbow, hip and knee were $106^{\circ}$, $133.14^{\circ}$ $156.87^{\circ}$ at pole in event, $158.94^{\circ}$, $65.7^{\circ}$, $140.19^{\circ}$ at pole out event. Elite skiers should decrease double poling time rate and increase recovery time rate in order to improve the double poling performance. The cycle length and velocity of the double poling should be increased for the better performance. The elbow angle should be minimized at pole in event with maximum extension until pole out event. The hip and knee angles should be increased for the recovery phase.

• 한국운동역학회지
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• 제29권1호
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• pp.1-8
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• 2019

Objective: The purpose of this study was to confirm that the cross-country ski sprint course in PyeongChang, where the 2018 Winter Olympics course was to utilize wearable devices equipped with inertial measurement unit (IMU), global positioning system (GPS) and heart rates sensor. Method: For the data collection, two national level cross-country (XC) skiers performed classic technique on the entire sprint course. We analyzed cycle characteristics, range of motion on double poling (DP) technique, average velocity, and displacement of 3 points according to the terrain. Results: The absolute cycle time gradually decreased during starting, middle and finish sections. While the length of the DP increased and the heart rates tended to increase for men skier. In addition, the results indicated that range of motion of knee joint during starting and finish section decreased more than middle section. The errors of latitude and longitude data collected through GPS were within 3 m from 3 points. Conclusion: Through the first case study in Korea, which analyzed the location and condition of XC skiers in the entire sprint course in real time, confirmed that feedback was available in the field using various wearable sensors.