Healthy is defined as a state of physical, mental, social, and spiritual well-being. Factors affecting the degree of health and physical fitness of an individual include age, sex, genetics, Body Mass Index (BMI) status, and physical activity. This study aims to analyze factors related to physical fitness (VO2 Max) in soccer athletes. This study was an observational analytic study with a cross-sectional design with a total population of 30 people. This research was carried out at football club X, Nganjuk District from January to June 2015. The variables studied in this study were age, supplement consumption, the status of BMI, and VO2 Max. Data analysis using the Chi-Square test. The results showed that aged 18-35 years (OR = 42; 95% CI = 5.11-345.10), athletes who took supplements (OR = 1.08; 95% CI = 0.24–4.79), normal BMI status (OR = 13.2 95% CI = 2.11
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