This study aims to determine the effect of skipping combination with body weight training on cardiorespiratory endurance and BMI as an effort to prevent Covid 19 for overweight adolescents. This research is an experimental research. In this study, treatment was given in the form of skipping exercise combined with body weight training for 8 weeks with a frequency of 3 times / week, an intensity of 60%-70% MHR with a duration of 30 minutes. The population in this study were teenagers. Sampling was done by purposive sampling on adolescents aged between 17-21 years and overweight. Instrument used to measure VO2 max with MFT (multistage fitness test) and measurement of height and weight to determine BMI. The data analysis technique used prerequisite test and paired t test. Based on the results of the cardiorespiratory endurance data analysis, the t-count value was 10.495 with a significance value of 0.000, it can be concluded that there is a significant effect of skipping combination with body weight training on cardiorespiratory endurance in overweight adolescents. The mean value of the cardiorespiratory endurance pretest was 34.92 and the posttest average increased to 40.05. While the results of the analysis on BMI data obtained a t-count value of 15.293 with a significance value of 0.000, it can be concluded that there is a significant effect of skipping combination with body weight training on BMI in overweight adolescents. The mean value of the BMI pretest was 26.60 and the posttest average BMI decreased to 22.19. So it can be concluded that skipping exercises combined with body weight training can increase cardiorespiratory endurance and reduce BMI as an effort to prevent Covid 19 for overweight adolescents.

The study purpose. This study aims to see: (1) The difference in the effect of barbell squat and resistance band squat exercises on the increase in leg power. (2) The difference in influence between players who have high leg height and low leg length on the increase in leg power. (3) The interaction of barbell squat and resistance band squat exercises with leg length (high and low) to increase the power of volleyball extracurricular participants. Materials and Methods. This is an experimental research using a 2 × 2 factorial design. The population in this study were 38 volleyball extracurricular participants at SMA Negeri 1 Sedayu. The sample in this study may be 20 people. Instruments used for measuring: a tape measure for the length of the legs and a vertical jump for the power of the legs. The data analysis technique used was two-way ANOVA. Results. The result showed that (1) There was a significant effect between barbell squat and resistance band squat exercises on the increase in the power of volleyball extracurricular participants, with an F value of 65.789 and a significance value of p = 0.000 (<0.05). The squat group has a higher resistance band (good) compared to the barbell squat group with an average difference of 2.5. (2) There was a significant difference in the effect of players who have high leg height and low leg length on the increase in leg power of volleyball extracurricular participants, it is proven that the F value is 38.000 and the significance value is p = 0.000 (<0.05). Players who have high leg length are higher (good) compared to players who have low leg length with an average difference of 1.90. (3) There was a significant interaction between barbell squat and resistance band squat and leg length (high and low) on the leg power increase of volleyball extracurricular members, with an F value of 88.256 and a significance of p = 0.000 (<0.05). Conclusions. There was a significant difference in the effect of barbell squats and resistance band squats on increasing leg power, there was a significant difference in the effect between players who have high leg length and low leg length on the increase in leg power, and There is a significant interaction between barbell squats and squat resistance bands and leg length (high and low) on the increase in leg power of volleyball extracurricular participants.

Tricet method of weight training is an exercise that involves using three types of tools to train one group muscle in the sequence order, but with different types of exercises for each set and without breaks between sets. Exercise with this method is able to provide maximum response to a group of muscles that are trained so that the potential for muscle development is more optimal. This paper investigates this method by giving a treatment in the form of weight training with the tricet method to be carried out 3 times a week, with exercise intensity of 70% to 80% or One Maximum Repetition (1RM), 3 sets, and 8-12 repetitions with the aim of increasing muscle hypertrophy. The results of the pre and post-test hypertrophy t-test analysis of arm, chest, thigh, and calf muscles in the experimental group showed a significant difference (p < 0.05). This investigation concluded that weight training based on the tricet method is able to increase hypertrophy over body large muscle.

Penelitian ini bertujuan untuk mengetahui pengaruh latihan shadow langkah berurutan dan bersilangan, serta perbedaan diantara keduanya terhadap meningkatkan kelincahan footwork pada atlet bulutangkis   PB Wiratama Jaya Yogyakarta. Penelitian ini merupakan penelitian eksperimen semu, dengan desain two group pre-test post-test design. Sampel dalam penelitian ini berjumlah 22 atlet putra. Instrumen dalam penelitian ini menggunakan tes rangkaian olah kaki yang dikemukakan oleh Tohar. Teknik analisis data pada uji hipotesis menggunakan uji t. Hasil penelitian menunjukan: pertama, ada pengaruh latihan shadow langkah berurutan terhadap kelincahan footwork atlet PB Wiratama Jaya Yogyakarta dengan  nilai t sebesar -4,5 dan signifikansi hitung sebesar 0,001. Kedua, ada pengaruh latihan shadow langkah bersilangan terhadap kelincahan footwork atlet PB Wiratama Jaya Yogyakarta dengan nilai t sebesar -4,667 dan signifikansi hitung sebesar 0,001, dan ketiga tidak terdapat perbedaan yang signifikan antara latihan shadow langkah berurutan dan shadow langkah bersilangan dalam peningkatan kelincahan footwork atlet PB Wiratama Jaya Yogyakarta. Hal ini berdasarkan data yang diperoleh dari nilai t sebesar -1,353 dengan signifikansi sebesar 0,191. The effects of shadow practice using sequential steps and crossing steps to footwork athlete agility AbstractThis study aims to determine the effect of shadow practice with sequential steps and crossing step of footwork athletes agility PB Wiratama Jaya Yogyakarta, knowing the difference of shadow practice with sequential steps and crossing steps in improving footwork athletic agility PB Wiratama Jaya Yogyakarta. This research is quasi-experimental research, using two-group pre-test post-test design. Sample of this study is 22 son athletes. Instruments in this study using a test foot circuit presented by Tohar. Data analysis technique of hypothesis using t-test. The results show that: first, there is the effect of shadow sequential step exercise on footwork athletes agility PB Wiratama Jaya Yogyakarta. It is proved by obtaining t value equal to -4,5 with significance count equal to 0,001. Second, there is the effect of the crossing steps shadow practice on footwork athlete agility PB Wiratama Jaya Yogyakarta. This is proved by obtaining t value equal to -4,667 with significance count equal to 0,001. And the third there is no significant difference between shadow sequential steps and shadow crossing steps in increasing agility footwork athletes PB Wiratama Jaya Yogyakarta. This is based on data obtained from the value of t -1.353 with significance is 0.191.

This study aims to determine how much influence aerobic exercise and weight training have on body fat and vital capacity. This study used an experimental method with a randomized control group pretest-posttest design. The population in this study were 68 female members at the Fitness Center, Faculty of Sport Science, Yogyakarta State University who participated in the weight loss program. The sample in this study was taken purposively by determining the number of members who participated in the training program with the criteria that active members were at least 2 months practicing before the treatment was carried out and women aged 18-25 years. Through these criteria, the sample obtained is as many as 54 people. Of the 54 people, they were divided randomly into three groups, namely the aerobic exercise group of 18 people, the weight training group of 18 people, and the control group of 18 people. The instrument used to measure and collect body fat data used a skinfold caliper, while the vital lung capacity was measured using a spirometer with a Vitalograph brand. The data analysis technique used the normality test, namely the Kolmogorov-Smirnov Test. This test is carried out to determine whether the data has a normal distribution. The homogeneity test used the Levene's Test with the F test. To test the research hypothesis, it was done using Analysis of Variance (ANOVA). This test was conducted to determine the difference in the mean value of the variables between the pretest and posttest in the experimental group. The results of the research analysis showed that aerobic exercise can reduce body fat by 4.651% and increase the vital lung capacity of members at the Fitness Center by 0.2167 liters / BTPS. Weight training can reduce body fat by 2.969%. Weight training can increase the vital capacity of the lungs by 0.1583 liters / BTPS. Aerobic exercise can reduce body fat by 1.68617% higher than weight training. Aerobic exercise can increase the ability of vital lung capacity 0.05833 liters / BTPS higher than weight training. Pengaruh latihan aerobik dan latihan beban terhadap lemak tubuh dan kapasitas vital paru AbstrakPenelitian ini bertujuan untuk mengetahui seberapa besar pengaruh latihan aerobik dan latihan beban terhadap lemak tubuh dan kapasitas vital. Penelitian ini menggunakan metode eksperimen dengan Randomized Control Group Pretest-Posttest Desain. Populasi pada penelitian ini adalah member perempuan di Fitness Center Fakultas Ilmu Keolahragaan Universitas Negeri Yogyakarta yang mengikuti program penurunan berat badan yaitu sebanyak 68 orang. Sampel pada penelitian diambil secara purposive dengan menentukan jumlah member yang mengikuti program latihan dengan kriteria yaitu member aktif minimal 2 bulan berlatih sebelum perlakuan dilaksanakan dan wanita usia 18-25 tahun. Melalui kriteria tersebut maka sampel yang diperoleh yaitu sebanyak 54 orang. Dari 54 orang tersebut dibagi menjadi tiga kelompok secara random, yaitu kelompok latihan aerobik sebanyak 18 orang, kelompok latihan beban sebanyak 18 orang, dan kelompok kontrol sebanyak 18 orang. Instrumen yang digunakan untuk mengukur dan mengumpulkan data lemak tubuh dengan menggunakan skinfold caliper, sedangkan untuk mengukur kemampuan kapasitas vital paru menggunakan spirometer Merk Vitalograph. Teknik analisis data menggunakan uji normalitas yaitu Kolmogorov-Smirnov Test. Uji ini dilakukan untuk mengetahui apakah data mempunyai sebaran yang berdistribusi normal. Uji homogenitas menggunakan uji Levene’s Test dengan uji F. Untuk menguji hipotesis penelitian dilakukan dengan menggunakan Analisis Variansi (ANAVA). Uji ini dilakukan untuk mengetahui perbedaan rerata nilai dari variabel antara pretest dan posttest pada kelompok eksperimen. Hasil analisis penelitian menunjukkan bahwa latihan aerobik dapat menurunkan lemak tubuh sebesar 4,651 % dan meningkatkan kapasitas vital paru pada member di Fitness Center sebesar 0,2167 liter/BTPS. Latihan beban dapat menurunkan lemak tubuh sebesar 2,969 %. Latihan beban dapat meningkatkan kapasitas vital paru sebesar 0,1583 liter/BTPS. Latihan aerobik dapat menurunkan lemak tubuh lebih tinggi 1,68617 % dibanding latihan beban. Latihan aerobik dapat meningkatkan kemampuan kapasitas vital paru lebih tinggi 0,05833 liter/BTPS dibanding latihan beban.