Background and Objective: relative marriages are one of the major factors in emergence of genetic disorders and disabilities, and it affects individual’s performance. And since relative marriage is common in our country, the study aimed to compare motor fitness and anthropometrical characteristics of teenager boys with nonrelative and relative parents.
Methods: In this Ex post facto research, 80 teenage boys of Arak city aged 14, 15, 16, 17 consisted of 20 people in non-relative groups and 20 people nonrelative groups were chosen that as sample, as targeted Multi-stage cluster were chosen in schools. The tool for gathering data, questionnaire of individual information, motor fitness test including: standing long jump and medicine ball throw, 36 meters running and ruler, 4×9 m shuttle run, BESS and test angel, Minnesota handing / eye and hand coordination. Anthropometric measuring tools consisted of tape measure, scale and Stadiometer were gathered. For data analysis, Kolmogorov Smirnov, and for statistical operation, SPSS software version 17 is used.
Results: finding of research showed that relative marriage of parents has a significant effect on moving readiness and anthropometric features of teenagers.
Conclusion: With considering findings of research, relative marriage has negative effects on moving readiness and anthropometric teenage boys, regarding relative marriages must be taken theses kind of marriages should be consummated with awareness and precautionary measures.