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The main problem is that service is only considered as the beginning of a match. When in fact service is a very important thing in a match, because service is a fast way to get points. One important part of the tennis serve is the skill of coiling or body rotation. The purpose of this service is to provide coiling exercises that are analyzed kinovea application. This service is carried out for 6 weeks with a frequency of 3 times per week. At the beginning and at the end of the meeting the partners' coiling skills were analyzed using the kinovea app. Partners are 30 South Sulawesi novice tennis athletes aged 14-16 years. The result of this dedication was an average increase in coiling skills of 1,267. So this service is necessary in improving coiling skills in order to be able to score points quickly in a match of tennis.

The main problem is the decreased level of fitness and concentration. The reason is technological advances so that a person does not need the energy to carry out his activities and can be recorded and stored in an online database. The author provides a community service solution with low-impact aerobic dance to increase cardiovascular endurance and concentration in 36 female students aged 18-20 years. The pretest at the first meeting, low-impact aerobic dance material is 30 minutes long, 3 times per week is carried out for 6 weeks, and ends with a posttest. The pretest and posttests used the Multi-Stage 20m Shuttle Run Fitness Test for cardiovascular endurance and the Grid Concentration Test for concentration. There was an average increase in cardiovascular endurance of 3.34 and concentration of 2.11. This dedication is necessary for increasing cardiovascular endurance and concentration so that daily activities do not experience fatigue and still have energy reserves to carry out other activities and be more focused.

Ada tiga pondasi utama yang penting dan wajib dipedomani untuk mencapai target prestasi atlet yaitu, potensi genetik, kecukupan nutrisi dan latihan terprogram. Nutrisi yang tepat akan sangat membantu penampilan optimal atlet saat bertanding. Selain itu nutrisi ini dibutuhkan pula pada kerja biologik tubuh, untuk penyediaan energi tubuh pada saat seorang atlet melakukan berbagai aktivitas fisik, misalnya pada saat latihan, bertanding dan saat pemulihan. Nutrisi juga dibutuhkan untuk memperbaiki atau mengganti sel tubuh yang rusak. Banyak pelatih atau atlet yang menganggap bahwa asupan nutrisi pada atlet sama saja dengan yang bukan atlet. Kenyataannya tidak demikian, asupan nutrisi pada atlet disiapkan berdasarkan pengetahuan tentang dominasi energi yang akan digunakan, peran sumber nutrisi tertentu pada proses penyediaan energi. Dalam hal ini termasuk pula tentang pemberian suplemen dan usaha khusus berupa modifikasi yang dilakukan terhadap asupan nutrisi pada waktu tertentu, dalam upaya meningkatkan kinerja atlet. dari workshop yang telah dilaksanakan ini para atlet bisa mencapai prestasi maksimal melalui pengaturan makan yang tepat dan variatif.