Kenryu Aoyagi

Kanto Gakuin University · College of Economics

In archery, avoiding postural tremor while aiming is one of the most important factors improving performance. Thus, efforts have been made to automatically detect shooting events and use basic statistics of tremor during the aiming period to predict the total score the archer will achieve. However, although they require many shots, previous shootin...

A key skill in archery is the ability to suppress postural tremor while aiming at a target. Providing feedback during daily archery practice is a potentially effective way of suppressing tremor. However, postural tremor is subtle and difficult to measure using vision-based techniques. This article proposes a feedback method that uses a bow equipped...

In Japan, some elementary schools have an environment for extracurricular sports activities. However, due to the declining population and burdens on teachers, this arrangement has been difficult to sustain. As a result, some regions have transitioned from school-based extracurricular sports activities to community-based sports activities, and this...

Studies have shown the potential effects of sedentary behavior and physical activity on not only physical and mental health but also academic performance in children. Nevertheless, studies have only focused on either sedentary behavior or physical activity. Examining the joint effects of both behaviors on academic performance provides detailed insi...

Lack of sufficient physical activity in youth is a worldwide concern. School-based extracurricular sports activities (SBECSA) are considered a central opportunity to increase youth physical activity. However, the factors that influence students’ participation in SBECSA are not well established. Therefore, the purpose of the present study was to cla...

Problem Statement: There is a notable burden placed on teachers to coach and manage school-based extracurricular sports activities. Outside of decreasing the time teachers are engaged in these activities, increasing teacher expertise may reduce this burden. However, the relationship between these burdens and teacher expertise is not well understood...

School-based extracurricular sports activity (SBECSA) has widely spread in Japan as a means for youth to play sports or exercise. Especially in junior high school and high school, SBECSA is actively conducted with a high participation rate of students. There have also been reports that elementary schools in some Japanese municipalities also have SB...

Recently, the carry-over of physical fitness or physical activity from childhood to adulthood has been actively discussed. However, the carry-over effect of participation in organized sports is not well understood, despite the fact that organized sports participation has a number of positive effects on physical, mental, and social aspects. Therefor...

Considering the benefits of participating in school-based extracurricular sports activities (SBECSA), providing active SBECSA is important. However, heavy burden on teachers in coaching and management of SBECSA has been reported. Additionally, appropriate allowance and role allotment have not been discussed enough. It is necessary to understand the...

Problem Statement: Many youths participate in school-based extracurricular sports activities (SBECSA). These SBECSAs contribute to positive youth development. However, SBECSAs sometimes require the outsourcing of human resources. The major reason is difficulty to manage SBECSAs by employing teachers as the primary coaching resources. Using external...

Although studies conducted to understand why athletes do not use Performance Enhancing Drugs (PEDs) are becoming more common, little is known about the problem from the “elite” athlete’s perspective. This study qualitatively identified the factors that had influenced the decisions not to dope of twelve retired Japanese elite athletes (six males and...

Objective: The present study was conducted to examine the effects of providing equipment for use during school recess on elementary school children's physical activity. Methods: In this cross-sectional study, 98 fifth-grade children (63 boys) from two elementary schools were assigned to an intervention group (n = 39) or a control group (n = 59). Th...

Outdoor education contributes to positive youth development. Existing outdoor education in Japan has been conducted only in an “episodic” manner with a “single activity” basis in “imitation nature”, although regular and various activities in “grand nature” have been considered more valuable for the growth of children. Therefore, the purposes of the...

School-based extracurricular sports activities are beneficial for positive youth development. However, there is a shortage of appropriate in-school coaches, and therefore recruitment of external coaches has been considered as one solution to this. A previous study has reported four model strategies of organizational promotion to recruit external co...

This study aimed to examine the importance of expected qualifications for external coaches and their differences between junior high and high schools. The participants were 253 teachers at public junior high and public high schools. A cross-sectional self-administrated questionnaire survey was conducted. The questionnaire was developed based on a p...

Use of external coaches for school-based extracurricular sports activities has been promoted because of the lack of teachers who can coach expertly and the large burden placed on teachers when coaching and managing such activities. However, it has been reported that securing external coaches through human resources is difficult. To promote the use...

In competitive sports, the enhancing of physical abilities, technical skills, and psychological states is vital for excelling in competition. A team’ s psychological wellbeing is often the deciding factor in team sport success. Nevertheless, few efficient strategies have been made for boosting teams’ psychological states, particularly during matche...

School-based extracurricular sports activity (SBECSA) is a beneficial activity for positive youth development. However, there are some problems regarding the management of SBECSA, such as the lack of SBECSA teachers who can coach expertly and the great burden for SBECSA teachers. Although the number of external coaches has not been sufficient, recr...

Participating in school-based extracurricular sports activities is valuable for the healthy development of children and adolescents. The use of external coaches (outsourcing human resources) has been suggested to support teachers in coaching and managing such activities. However, hiring external coaches is difficult, and their number is insufficien...

Promoting engagement of external coaches in school-based extracurricular sports activities (SBECSA) is valuable for positive youth development. However, the number of external coaches is insufficient. When trying to enhance recruitment and engagement of external coaches, registrants of sports leader banks are a good potential source of external coa...

School-based extracurricular sports activity (SBECSA) has developed as an opportunity that adolescents play sports in Japan. However, there are some issues to maintain active SBECSA such as lack of teacher who can coach SBECSA expertly, and large imposition of teachers to manage SBECSA. For resolving these issues, promoting engagement of external c...