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      Journal of Scientific Coaching for Training
      Online ISSN : 2434-3307
      Print ISSN : 2433-6742
      Current issue
      Journal of Scientific Coaching for Training VOL.3 NO.1
      Showing 1-3 articles out of 3 articles from the selected issue
      • Yuta KIKUCHI, Rikiya SUNAKAWA, Takuya MASUZAWA
        2020 Volume 3 Issue 1 Pages 3-11
        Published: 2020
        Released: September 11, 2020
        This study aimed to clarify the influence of training using slackline on balance ability. The subject was a rugby player of 18 healthy male college students. Subjects were divided into three groups (slack line group; SL, front and side bridge group; FS, control group; Cnt), training was conducted twice a week for 4 weeks. We measured center of gravity fluctuation, muscle strength, reaction jump test before and after training, ratings of perceived exertion (RPE) was recorded every time immediately after training. The speed of the center of gravity fluctuation was significantly decreased after SL and FS training. The back strength did not change between SL and FS, and Cnt showed a decreasing trend. The value of RPE was significantly lower in SL than in FS. It was suggested that the training using the slack line improved the balance ability as much as the stabilization type trunk training, and the subject felt the training strength small.
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      • Rina Terada, Tatsuki Naka, Norihiro Shima, Masaaki Kanno
        2020 Volume 3 Issue 1 Pages 12-17
        Published: 2020
        Released: September 11, 2020
        It is shown that chair stand power index considering the influence of leg length is more relevant to muscle strength, power, and muscle cross section, rather than sit-to-stand time index (STS-T). This study aimed to investigate the relationship between movement ability and 10-repetition STS-T as well as sit-to-stand power index (STS-P) calculated by body height and chair legs length. The subjects were 2055 men and women aged 20 to 97 years. Both indices, STS-T and STS-P were found to be related to 10m fast walking and stair climbing. Classification by age resulted in higher correlation coefficient as the age increased. The correlation coefficient of 10m fast walking was found to be high than in stair climbing. STS-T and STS-P determination is suggested to be useful to estimate movement ability or stairs climbing in the elderly, who has fall risk in the determination, and to be available as simple and indirect assessment of walking ability.
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      • Takahiro Igawa, Yusuke Okazaki
        2020 Volume 3 Issue 1 Pages 18-24
        Published: 2020
        Released: September 11, 2020
        This study aimed to examine the effects of coordination exercises on the running, agility and jumping abilities of 15 preschool children who participated in a series of exercise classes. The classes were held 15 times a week over the course of three months, with the 1st (Pre), 8th (Mid),and 15th (Post) measurements being taken for data analysis. The measurement items used to assess the participants’ abilities were a number of exercises, including the 10m run, pro agility run, four sensor agility, vertical jump, and rebound jump. The results indicate that, for the items other than the rebound jump, the participants’ scores during the Mid and Post sessions were higher when compared to the Pre session. Additionally, after calculating the effect size, the first half of the exercise classes was found to be higher than the second half; In addition, in 4 sensor agility, both genders showed the highest value. From these results, it was found that coordination exercises performed by preschool children had a positive effect on improving their running, agility and jumping abilities. Furthermore, it became clear that the effect became higher in the early stage of exercise. For the rebound jump skill, it is necessary to add a ballistic jumping motion that is performed within a short contact time to the program for a long time.
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