In this paper, we tried to find out the difference of CoM displacement, CoM velocity and Foot-pressure between draw motion and takeout motion in curling’s delivery motion. To do this, we experimented for 10 female athletes of curling national team(all athletes are in her 20th~30th ages) to carry out draw motion and takeout motion from backline to near hogline in state of speed limit. The limited speed was 3.80~3.90 sec for draw and 2.97~3.07 sec for takeout. From the experiments, we obtained the result like followings. 1. Draw motion is more increase than takeout motion in displacement of horizontal direction of CoM displacement. 2. Takeout motion is more increase than draw motion in displacement of vertical direction of CoM displacement. 3. Takeout motion is faster than draw motion in both of horizontal and vertical direction of CoM max. velocity. 4. Takeout motion is higher than draw motion in pressure of fore-foot and mid-foot of foot-pressure 5. Draw motion is higher than takeout motion in pressure of fore-foot and mid-foot of foot-pressure These result means that the characteristics of techniques for draw motion and takeout motion is differ from each other and it is necessary to take different training protocol individually to enhance athletes’s performance. And further research will contains another things like that the pursuit of curling stone’s rut by various delivery techniques
Purpose The purpose of the study was to perform a comparative analysis of the YANG Hak Seon technique carried out by "K" athlete with the kinematical data of "Y" athlete and propose a method to improve the YANG Hak Seon technique of "K" athlete. Method The subject recruited for the study was a male athlete from Korean national team (Age: 21, height: 1.65 m, body weight: 59.6 kg, and career: 11 years). Four high - speed cameras were used to analyze the 3D motion of the YANG Hak Seon technique performed by "K" athlete. The variables selected for analysis were the velocity of COM, displacement of COM, the rotational & torsional angle of the trunk and rotational & torsional angular velocity of the trunk. The results obtained were compared to the preexisting data of the "Y" athlete (data set from the published research). Results Firstly, the horizontal displacement of the YANG Hak Seon technique of the "K" athlete was observed to be shorter along with lower vertical displacement during landing compared to “Y” athlete. In addition, the overall horizontal velocity was low and vertical velocity was not generated which rises during the BC (board contact) phase. Although the rotational angular velocity of the trunk was lower during the BC, HC (horse contact) phase and LD (landing) phase, torsional angular velocity was higher during the LD. Conclusion In order to improve the completeness of the YANG Hak Seon technique of the K player, it is necessary to enter with a fast and low posture on the footplate during the initial phase. In the BC phase, it is essential to raise the COM simultaneously while landing on the footplate and increase the rotational angular velocity of the trunk.
To provide the distribution of cardiorespiratory fitness including Bruce treadmill exercise time and estimated peak oxygen uptake (VO2peak) and investigate association with cardiorespiratory fitness and metabolic syndrome, sedentary lifestyle, or education level among Korean adults. Analysis of data on 2,006 adults (19-64 yr) who had completed a maximal grade treadmill exercise test, from the Sports Institute of Sports Science Fitness Standards (KISS FitS) project 2014-2015. The mean maximal exercise time was 11’26’‘, 11’18’‘, 11’06’‘, 10’03’‘ and 8’51’‘ (minutes and seconds) for men 19-29, 30-39, 40-49, 50-59 and 60-64 years of age, respectively, for women, it was 9’49’‘, 9’09’‘, 8’42’‘, 8’01’‘ and 7’33’‘ for the corresponding age groups. The mean peak oxygen uptake was estimated as 42.3, 41.8, 41.2, 37.6 and 33.6 ml/kg/minute for men 19-29, 30-39, 40-49, 50-59 and 60-64 years of age, respectively, For women, it was 34.0, 31.8, 30.3, 28.0 and 26.4 ml/kg/minute for the corresponding age groups. A positive association between cardiorespiratory fitness level and education level was observed for both men and women. Furthermore, participants with sedentary lifestyle had a significantly lower cardiorespiratory fitness than participants with activity lifestyle. Finally, Men with moderate and high fitness level had 50% and 87% lower odds for the metabolic syndrome, and women had 48% and 50% lower odds for the metabolic syndrome, respectively, than the ones with low fitness level after adjustment for age, smoking, alcohol intake, and sedentary lifestyle. These results can be used to track future Korean assessments and to evaluated interventions. The differences in fitness status by education level, sedentary lifestyle or metabolic syndrome can also be used to develop health policies, program and educational services.
