Reason for doing this study is analyzing the effect of eight weeks aerobic exercises under maximum while being dialyzed on their phosphorous serum, calcium, hemoglobin, blood pressure and the life quality of hemo –dialyzed patients in Bojnurd. The sample study were 20 patients who suffer from kidney malfunctioning (10 of them in experimental group and 10 in control group) of hemo –dialyzed patients after receiving their written agreement. Mean and Standard deviation of the age of experimental group were 31.1± 9.5 and observational group 35.1±4.5, height of experimental group 1.60± 12.5 and observational group 1.64±9.4, weight of experimental group 55.60± 16.6 and observational group 60.5 ±11.5 kilograms. A dialyzed background for experimental group was ±30.94, 49.4 and for observational group was ±35.5, 40.8. All of them were kidney malfunctioning patients. They didn’t have any heart-vascular and diabetes and their medicine dosage were unchangeable during eight weeks exercise. On the first day of aerobic exercise they had blood checkup and fill out questionnaire. They were working with mini-bikes for eight weeks. They had three sessions a week and each one 30 minutes exercise and the intensity of each one was %55. After eight weeks they had blood checkup again and fill out SF-36 quality life questionnaire. After collecting and giving data to SPSS 16 software, raw data were analyzed. After confirming the data distribution is normal using the KOLMOGEROF-SMERINOF, then related and independent Tstudent test was taken to analyze the changes intra-groups and inter-group. Results of this study showed that there is no significant difference between hemoglobin, blood diastolic pressure, blood phosphorous level and life quality (general health, role playing limitation because of physical reason and pain) of kidney malfunctioning patients but it was a significant difference between calcium, blood systolic pressure results and life quality with physical function under scale. But despite the average difference in mental aspect, statistically the difference of this aspect is not significant.

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