Spring steel is one type of material that is widely used in various engineering applications, such as vehicle suspension systems and equipment that require resistance to dynamic loads. Spring steel possesses various mechanical characteristics that are strongly influenced by the microstructure of the material. These characteristics remain consistently affected throughout the entire material. Heating that occurs due to exposure to flame can alter certain microstructural properties of spring steel and affect its performance. In this study, an analysis was carried out on all changes in the microstructure of spring steel caused by flame heating, as well as its effect on the hardness of the material. The results of the study showed that heating can indeed cause changes in the microstructural phase and a decrease in fatigue resistance of the spring steel.

Elderly aged 60-70 years will experience changes in body condition, both physical and mental changes such as decreased physical fitness and cognitive disorders. This study aims to determine the level of fitness and cognitive disorders of elderly aged 60-70 years who participate in Tai Chi gymnastics. The method used is descriptive analytical with a Cross Sectional approach. The subjects of the study were 20 elderly aged 60-70 years, using a purposive sampling technique. The data collection technique for physical fitness levels was measured through the Six minutes walk test, while cognitive disorders used the mini-mental state examination (MMSE) questionnaire. The results of the study showed that the average level of male fitness was in the moderate fitness category (40.3%), the good category was (50%) and the very good category (6.3%), while female physical fitness was in the moderate fitness category (75%) and the very good category (25%). Research Results Cognitive disorders in elderly men who were in the normal category were 87.5% and probable cognitive disorders were 12.5%, while in elderly women cognitive disorders were in the normal category were 100%. In conclusion, the level of physical fitness of the elderly is in the good category, while cognitive disorders of the elderly are in the normal category

The training program in sports is the most important thing in achieving an achievement that is the main target of each team. This factor is none other than the existence of long-term coaching and various training programs. This factor is none other than the existence of long-term coaching and various training programs. A coach provides a variety or varied training program to be evaluated at the end of the training. The purpose of the evaluation itself is to correct mistakes from either the training program or the athlete. The research method of evaluating the CIPP program (context, input, process, product) using quantitative and qualitative descriptive methods. The results of the research on the Evaluation of the Coaching of the Futsal Club Mitra Fc U-20 Sumenep Regency, received a score of 3.35 which is categorized as very good. 3) Process The results of the research on the Evaluation of the Futsal Club Mitra Fc U-20 Sumenep Regency, received a score of 3.35 which is in the very good category. 4) Product The results of the research on the Evaluation of the Futsal Club Mitra Fc U-20 Sumenep Regency, received a score of 3.31 which is in the very good category. Based on the results of the research that has been carried out, there are the following conclusions: 1. Aspects of context, input, process, product. With good performance indicators, excellent efforts, and good results.
 

Taekwondo is a martial arts sport that requires a combination of technique, tactics, and optimal physical condition to support athletes' performance. In the kyorugi category, components of physical conditions such as strength, speed, endurance, flexibility, and explosiveness are elements in determining the success of athletes in competitions. many athletes have not reached maximum performance due to the lack of targeted physical condition development. This study aims to analyze the needs of the physical condition components of taekwondo athletes in the kyorugi category in the Gresik Regency team. The research method used is an ex-post facto  with a descriptive approach. The research subjects consisted of 8 athletes, athletes with measurements including sit-up, abdominal rollers, single leg squats, splits, standing broad jumps, and multistage fitness tests. The results showed that physical components such as speed, abdominal muscle strength, leg strength, muscle explosiveness, core strength, and endurance had a significant influence on athlete performance. flexibility was not found to be the main distinguishing factor between medal-winning and non-medal-winning athletes. The conclusion of this study is that the development of training programs that focus on increasing strength, endurance, and explosiveness is essential to support the achievements of taekwondo athletes in the kyorugi category.

This research was conducted to look at team components starting from the strengths and weaknesses of the team so that it can be used as evaluation material to make better improvements to the team to face the next match. This research also aims to confirm the findings of video analysis in the final match of the East Java Floorball men's team at the 2024 Aceh-Sumut PON XXI exhibition. This research methodology uses quantitative descriptive, which uses match video analysis data to paint a picture or reveal information about the facts. facts about the final field for the men's floorball team in East Java. The sample from this research was the East Java Floorball men's team who were the core players or who only played in the final round. The researcher's data sheet on video match analysis served as a tool. The quantitative descriptive data analysis method was applied using figures obtained from video study findings and evaluation results. From the results of video analysis of the final match of the East Java Floorball men's team, when compared with other strategies, it was found that the tactics of passing and controlling the ball gave the best results. Players gain an advantage when the opposing team has the ball as a result of frequently using this method and developing their game. The East Java Floorball men's team has better ball control than its opponents because their passing technique and ball control are superior.

The development of sepak takraw originates from a traditional game that originally developed in North Sumatra, West Sumatra, South Sumatra. This sepak takraw game has various names for this type of game in various regions, such as the famous one in Riau, namely high rago, in Bengkulu it is called Cepak, in Sumatra and Jambi it is called sapak rago, while in South Sulawesi it is known as Marraga - Akraga. South Sulawesi, North Sumatra, South Sumatra and West Sumatra are places that produce rattan which will be used as raw material for making takraw balls. Double event sepak takraw is a sepak takraw game played by two people in one team, the way of playing is slightly different from the general sepak takraw game. The difference is that the serve is generally carried out in a ditekong or half circle for the ball thrower and also a circle in the middle of each team's area which has the function of kicking the initial ball which is often called a serve but in this study a double event game is used where the serve is done alone so that
the kicker or throwing is done alone.