Jurnal Sains Keolahragaan dan Kesehatan

Comparison of Whole Body Reaction Time Between Singles and Doubles Badminton Players Aged 14–17 Years

Mar'ie Muhammad — 2025-12-16

Whole Body Reaction Time (WBRT) is an important biomotor component in the performance of badminton athletes, especially in responding to unexpected stimuli during matches. This study aims to compare the WBRT between male singles and doubles badminton athletes aged 14–17 years. The research used a quantitative comparative approach with purposive sampling technique. The population consisted of 60 athletes at PB Taqi Arena, West Bandung Regency. Based on the inclusion criteria, 37 athletes were selected as samples, consisting of 18 singles and 19 doubles athletes. Data collection was conducted on May 3–4, 2025. Measurements included anthropometry (Omron Karada Scan HBF-375), height (Stature Meter OneMed HT701), and WBRT (Whole Body Reaction Measuring Equipment Takei TKK-5408). Shapiro–Wilk normality test results indicated normal distribution in both groups (p > 0.05). The average WBRT for singles athletes was 0.286 ± 0.024 seconds, while for doubles athletes it was 0.260 ± 0.021 seconds. The independent samples t-test showed a significant difference between the two groups (p = 0.002). These findings indicate that doubles athletes have better whole body reaction speed compared to singles athletes. This difference is likely influenced by tactical demands and playing patterns in doubles, which require quick responses to stimuli from both opponents and partners. These results can serve as a basis for designing specific training programs based on match type to optimally improve athletes' reaction performance.

Keywords: badminton, reaction time, whole body reaction, singles and doubles events.

Lower-Body Power, Body Composition, and Agility Performance Among Youth Badminton Athletes

Rafif Rifqi Naufal Hasyim — 2025-12-16

Agility is an important component in badminton. Agility is the ability to move with

speed and accuracy to reach the shuttlecock in various corners of the court. This

study aims to analyze the correlation between lower-limb power and body

composition on agility performance in badminton athletes. Participants were 27

female badminton athletes aged 15.44 ± 0.97 years. Body composition (height, body

fat percentage - BF%, body mass, BMI, skeletal whole body muscle - SM%),

countermovement jump - CMJ, and t-test agility was measured. The data was

analyzed using descriptive statistics, Spearman correlation test and hierarchical

multiple regression. Spearman correlation test showed that there was no significant

relationship with agility (r = -0.40, p = 0.884). Hierarchical regression analysis

showed that age, body composition, and CMJ only explained 17.4% of the variance

in agility, with a statistically insignificant contribution (ΔR² = 0.019, p = 0.483).

Among the independent variables, BF% had a strong positive relationship with

body mass (r = 0.763, p < 0.01), indicating that the higher BF%, the higher the

body mass. Meanwhile, SM% had a significant negative correlation with BF% (r =

-0.498, p < 0.01) and body mass (r = -0.506; p < 0.01), indicating that the higher

SM%, the lower the BF% and body mass. Although the variables tested did not

contribute significantly to agility, various previous studies have shown that training

programs such as plyometrics, core strength training, and Velocity-Based

Resistance Training (VBRT) are effective in increasing lower-limb power, which

also affects agility.

Keywords: agility, body fat, skeletal muscle, lower-limb power, CMJ, youth,

badminton

Leisure Time Habits and Physical Activity Levels in Junior High School Students in the Kepulauan Seribu, Jakarta

Raisa Ganeswara — 2025-12-16

Physical activity during adolescence plays a vital role in supporting optimal

physical and mental development. This study aimed to assess physical activity levels

and sedentary behavior among junior high school students in Thousand Islands

regency of Jakarta, Indonesia. The research involved 215 students from grades VII

and VIII, consisting of 104 males and 109 females. Physical activity levels were

assessed using a modified version of the International Physical Activity

Questionnaire (IPAQ) tailored for adolescents. The results indicated that the

majority of students on both islands demonstrated moderate to high levels of

physical activity, with a relatively low prevalence of sedentary behavior. These

findings suggest that the students’ engagement in active routines is influenced by

the geographic and socio-cultural characteristics of their island environment,

which promote outdoor and communal activities. However, a small portion of

students reported low activity levels, emphasizing the need for context-sensitive

interventions to sustain and enhance active behaviors. This study highlights the

importance of integrating localized health promotion strategies to prevent the long-

term risks of obesity, metabolic disorders, and mental health challenges. The results

serve as a valuable reference for health policymakers and educators in designing

effective physical activity programs for youth in remote and coastal communities.

Keywords: children, jakarta, leisure, physical activity, sedentary

Smart Strategies To Prevent Acl Injuries: What Does The Research Say About Fifa 11+?

Miftahudin Sigit — 2025-12-16

Background: Anterior cruciate ligament (ACL) injury is one of the most serious

and frequently occurring injuries among youth football players. Such injuries not

only disrupt athletic performance and training continuity but also pose long-term

risks to an athlete's career and knee joint health. Neuromuscular-based preventive

approaches have become a central focus in modern sports science to reduce the

incidence of non-contact injuries. Objective: This systematic review aims to

evaluate the scientific evidence regarding the effectiveness of the FIFA 11+

program in reducing the risk of ACL injuries among adolescent and young football

players. Methods: A comprehensive literature search was conducted through

PubMed, Scopus, ScienceDirect, and Google Scholar for studies published between

2008 and 2024. The inclusion criteria included randomized controlled trials

(RCTs), prospective cohort studies, and systematic reviews or meta-analyses that

assessed the impact of the FIFA 11+ program on ACL injury prevention. Results:

A total of 10 studies met the inclusion criteria. Most of these studies demonstrated

that implementation of the FIFA 11+ program reduced ACL injury risk by 30–77%,

improved neuromuscular stability, and enhanced postural control and dynamic

balance. The program's effectiveness was highly influenced by coach adherence,

supervision quality, and training frequency of at least two to three sessions per

week. Conclusion: The FIFA 11+ program has been proven to be an effective, low-

cost, and easily implementable warm-up strategy for ACL injury prevention among

youth football players in Indonesia. It has the potential to serve as a sustainable

national model for neuromuscular-based injury prevention.

Keywords: ACL injury, injury prevention, FIFA 11+, neuromuscular training,

youth football, coach education

Comparison of Body Composition between Raiders and Defenders in Kabaddi: Muscle Mass and Fat Percentage

Muhammad Wahyu Triatmaja — 2025-12-16

Kabaddi is a complex game with high intensity, where each player must have good

aerobic and anaerobic capacity. Considering the playing position, body

composition needs to be taken into account, because ideal body composition is a

determining factor in an athlete's performance. This study aims to determine the

body composition of kabaddi players and compare the characteristics of muscle

mass (kg) and fat percentage (%) between raiders and defenders. This study uses a

comparative quantitative method with a sample size of 19 kabaddi athletes from

East Java. Body composition measurements were taken using InBody H20, which

measures muscle mass and fat percentage. Data analysis was performed using the

t-test with the help of SPSS software. The results of this study showed that there was

no significant difference in muscle mass between raiders and defenders (p=0.223),

and there was no significant difference in fat percentage (p=0.930). The conclusion

is that even though the raider and defender positions have different roles, the

balance between muscle mass and body fat percentage is one of the factors that

supports optimal performance. Due to the complementary and dynamic playing

patterns in kabaddi, athletes from both positions have almost equivalent physical

requirements, which leads to similar body compositions.

Keywords: kabaddi, body composition, muscle mass, fat percentage

Identification of Community-Based Football Activities in Yogyakarta: A Philosophical Review

Andhika Djalu Sembada — 2025-12-16

Football is not always professional and is not entirely competitive or achievement-

oriented. Football can also be carried out as a recreational activity. Community-

based football, more familiarly known as fun football, represents football activities

that are recreational in nature. This study aims to identify the philosophical values

contained in community-based football activities in Yogyakarta. Using a

qualitative-philosophical approach (ethnography, phenomenology, hermeneutics),

this study explores how community football is not only understood as a physical

activity but also as a medium for reflecting humanistic values, solidarity, and local

identity. Data were collected through participatory observation, in-depth

interviews with respondents (consisting of players, coaches, team administrators,

and field managers), as well as text analysis from relevant documents. The research

results show that community football in Yogyakarta contains philosophical values

such as mutual cooperation, togetherness, and happiness. This activity also serves

as a space for negotiation between local traditions and modernity, which can have

a positive impact on the sports tourism sector. The study concludes that community-

based football in Yogyakarta is a social practice rich in philosophical meaning, as

well as a form of resistance to the commercialization of sports.

Keywords: philosophical, community, football, yogyakarta.

A Preliminary Study on the Need for Psychological Interventions for Injury Rehabilitation in Youth Footballer

Putu Satwika — 2025-12-16

Psychological responses can also be found in injured soccer players. There is

limited literature on the availability of psychological interventions that can help

athletes return to training and competition after injury in the Indonesian context.

This study aims to analyze the need for psychological interventions to support post-

injury medical rehabilitation in adolescent soccer athletes. Rapid Qualitative

Assessment A survey was conducted with a youth soccer player, a coach, and a

physiotherapist to understand the cognitive, emotional, and behavioral responses

of youth soccer players undergoing injury rehabilitation. Data analysis was

conducted using thematic analysis to generate themes regarding player reactions

to injury, support received, and expectations regarding needed psychological

interventions. Based on the resulting themes, intervention needs were identified

related to managing negative emotions and interpretations due to injury, fostering

motivation for recovery and encouraging behaviors that support rehabilitation, and

social support. These needs can serve as a reference in determining psychological

intervention methods for assisting youth soccer players who experience injuries..

Keywords: analysis needs, interventions psychology, rehabilitation injury, youth soccer

The Effect of Complex Training Method On The Improvement of Leg and Arm Power in Muay Thai Club Members

Harun Harun — 2025-12-16

Power is key element in Muay Thai to executing quick attacks and avoiding

opponent attacks, Therefore, developing power through a structured training

program is crucial for Muay Thai athletes to improve their performance in the

fighting arena. The aim of this study is to investigate the effect of complex training

on improving leg and arm power among members of a Muay Thai club. This study

employed a one group pre-test post-test design with 15 participants. The complex

training program was carried out in 12 sessions over 4 weeks. The Standing long

jump Test was used to measure leg power, while the Medicine ball chest pass Test

was used to measure arm power. Data were analyzed using the Shapiro-Wilk

normality test, homogeneity test, and paired sample t-test with SPSS version 27.

The findings revealed that leg power increased by 8.87% (from 201.53 ± 24.26 cm

to 219.40 ± 31.55 cm), but this increase was not statistically significant (p = 0.132;

p > 0.05). Meanwhile, arm power increased by 20.16% (from 332.93 ± 74.49 cm

to 400.07 ± 53.77 cm) with a statistically significant difference (p = 0.015; p <

0.05). Complex training significantly improved arm power but did not significantly

affect leg power.

Keywords: complex training, leg power, arm power, muay thai.

Improving Young Athletes' Life Skills Through An Integrated Early Age Football Competition Model In The Framework Of Positive Youth Development

Lalu Hulfian — 2025-12-16

The background of this research is based on the importance of developing young

athletes, emphasizing not only technical sports skills but also character

development, social skills, and readiness to face life's challenges. This study aims

to analyze the effectiveness of an integrated competition model in improving the life

skills of young athletes as part of Positive Youth Development (PYD) efforts. The

research method used was a quasi-experimental design with a pretest-posttest

control group. The research subjects consisted of young athletes aged 12–16 years

with a total sample of 48 athletes (24 experimental; 24 control). The

average -pretest score of the experimental group was 142.8 ± 9.4 and increased in

the posttest to 147.1 ± 8.7 (Δ = +4.33). The control group increased from 141.9 ±

9.1 to 142.1 ± 8.5 (Δ = +0.17). The treatment effect showed a significant difference

(t = 8.29; p < 0.001) with a Cohen's d effect size of 1.69. The integrated competition

model resulted in the largest improvements in teamwork (20%) and communication

(18%). These findings confirm that combining competitive elements with life skills

learning structures is an effective strategy in supporting Positive Youth

Development.

Keywords: life skills, young athletes, integrated competition model, positive youth development

Sports Injury Patterns and Incidence Among Adolescent Pencak Silat Athletes

Yudhi Teguh Pambudi — 2025-12-16

The expanding popularity of Pencak Silat, particularly in the full-contact sparring

category, exposes athletes to significant injury risks caused by intrinsic and

extrinsic factors, including the implementation of complex new regulations.

Therefore, a comprehensive understanding of these rules by referees is critical to

mitigate injuries and prioritize athlete safety. This study aims to analyze the

incidence of injuries among pencak silat athletes participating in the Pekan

Olahraga Pelajar Daerah, a regional multi-event Regional Student Sports Week in

Indonesia at the district level in the regencies of Banyumas, Cilacap, Purbalingga,

and Banjarnegara, Central Java Province. This study employed a cross-sectional

survey design, involving 142 adolescent pencak silat athletes selected through

purposive sampling. Data were collected using a structured questionnaire adapted

from Fuller et al and supplemented by interviews to validate responses. The

questionnaire focused on athlete demographics, injury characteristics, and affected

body regions. Data were analyzed using descriptive statistics, including frequency

distribution and percentage calculations, to provide an empirical overview of injury

patterns and incidence rates. The majority of injuries occurred during training

sessions (87%) rather than competitions (27%). Chronic injuries were more

prevalent (85%) compared to acute injuries (15%). The lower extremities were the

most affected body parts (77%), particularly the knee (26%), ankle (24%), and hip

(24%). Pencak silat athletes are more prone to chronic injuries, particularly in the

lower extremities. Injury prevention efforts should focus on proper warm-up

routines, injury education, and enhancing technical skills to minimize injury risks

during both training and competition.

Keywords: pencak silat, sports injuries, injury assessment, injury prevention.