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With rapidly development of Chinese economy, aged population is also constantly increasing. By far, China has already been regarded as "aging" country. How to enhance old people physiqueguarantee the old physical healthprolonging life-span has become an important topic of current society, so physical exercises that are closely related to health also attracts more and more old people attentions. The paper makes specific analysis of old people physical exer- cises consciousness, motivation, sports places' conditions, relationship between whether participating in sports activities and prevalence rate, the old participate in physical exercises influence factors, old people physical exercises efficiency and other situations, it gets old people physical activities existing problems in development process, and puts forward reform measures. Apply grey relational degree method; establish grey relational degree-based old people physical exercise to physical health influence model, by calculating old people physical exercises durationintensityfrequency and health index correlation degree values, and then get that old people physical exercise frequency has the largest impacts on physi- cal health, old people should increase physical exercise frequency to keep fit.

Grey Relational Degree-based Old People Physical Exercises Influences on Physical Health