Sport is a medium for people to gather and has become a new necessity in life. One of the most popular sports that many compete in is athletics. VO2Max is one of the supporting achievements of athletes, especially branch athletes who require good physical condition. Based on information from the management of the Indonesian Athletics Association in the city of Lubuklinggau, athlete performance tends to decline from the 2019 Provincial Sports Week in Prabumulih City where athletes running the 1,500m middle distance did not achieve good results. , athletes were only able to finish in 10th and 13th place. In the research used, this was experimental research using a one group pretest posttest design, where this research method was used to look for cause and effect or the influence of one variable on another variable. The population of this study were all 10 athletic athletes from the city of Lubuklinggau. The sampling technique was random sampling. This research involved 10 athletic athletes from the city of Lubuklinggau with 16 treatments in the form of interval training exercises, giving results where the average VO2Max before was 42.15 which changed to 44.12 after being given interval training treatment. Meanwhile, the results of scientific tests through the paired sample t test show that there is an influence of interval training on the VO2Max results of Lubuk Linggau City athletic athletes because the tcount is (5.625 - 1.833). Based on the findings of the research results above, this research can be concluded that the average VO2Max before was 42.15 which changed to 44.12 after being given interval training treatment. The results of statistical tests using the paired sample t test show that there is an influence of interval training on the VO2Max results of Lubuk Linggau City athletic athletes.

This study aims to determine the Physical Condition of SMBR FC (Semen Baturaja Futsal Club) Futsal Athletes. The sample in this study were SMBR FC (Semen Baturaja Futsal Club) futsal athletes totaling 10 people. This type of research is quantitative descriptive research, the instrument used consists of balke test, vertical jump test, sprint test, and shuttle run test. Based on data processing carried out with a statistical system, athletes who get the perfect category are 3 people with a percentage (30%), a very good category is 2 people with a percentage (20%), a good category is 4 people with a percentage (40%), a sufficient category is 1 person with a percentage (10%), while the category is lacking none with a percentage (0%). Thus, the physical condition of SMBR FC (Semen Baturaja Futsal Club) futsal athletes can be categorized as good.

The problem in this research is whether there is an effect of arm muscle strength training on the lower serve ability of volleyball extracurricular students at SMP Negeri 4 Muara Enim. This study aims to determine the effect of arm muscle strength training on lower serve ability in volleyball extracurricular students at SMP Negeri 4 Muara Enim. This type of research is experimental research, using a one group pretest-posttest design method. The population in this study were extracurricular volleyball students at SMP Negeri 4 Muara Enim, totaling 45 people with 25 boys and 20 girls. Meanwhile, the sample in this study were all male students who took part in extracurricular activities in class VII, class VIII and class IX with a total of 25 students. The sampling technique in this research uses a purposive sample technique. The data collection technique uses the lower serve test method in volleyball. The data analysis technique uses the t test formula. Based on the results of research conducted on volleyball extracurricular students at SMP Negeri 4 Muara Enim, the average pretest result was 12.46 and the average posttest was 19.9. This shows that bicep curl training can improve the ability to serve under the ball game. volleyball among volleyball extracurricular students at SMP Negeri 4 Muara Enim. Because there was an increase after being given treatment compared to before being given treatment. In hypothesis testing, the value obtained was tcount > ttable or 31.93 > 1.71 so that it could be concluded that there was an influence of arm muscle strength training on the lower serve ability of volleyball extracurricular students at SMP Negeri 4 Muara Enim.