| Summary: | "nBackground: The purpose of this study was to determine the age- related loss of health-related physical fitness and norma­tive data in healthy population women aged 20-60 years old of Tehran, Iran. "nMethods: In this cross-sectional study, 1000 healthy women aged 20-60 years old were randomly selected from northern, south­ern, eastern, western and center regions of Tehran. Cardiovascular fitness was determined by Ros and Jakson protocol. Body composition were measured using Jackson and Poolak procedure, flexibility was determined by sit and reach test, muscu­lar strength with a standard dynamometer and muscular endurance were measured with Sit-ups test in one minutes. "nResults: Cardiovascular fitness (vo2max), body composition, flexibility, muscular strength and endurance remained un­changed in the 20 and 30 year old age groups. Around of 40 years old, cardiovascular fitness, muscular strength and endur­ance began to gradually decline but body composition increased and flexibility unchanged. Data for Vo2max and the other vari­ables in 4-yr groups provide "normative" results.  Result indicated age- related declined in Vo2max (0.43 ml/ kg/min× yr (-1)), muscular strength (0.004 kg/weight ×yr (-1)) and endurance (0.63 repetition ×yr (-1)), and increased in body fat (0.43 % ×yr (-1)) in 30-60 year. One-way ANOVA test showed that all variables significantly differed (P<0.001) among dec­ades except sit and rich test (P< 0.059) between the second and third decades. Vo2max had a significant relationship (P< 0.01) with Age, BMI, body fat percent and muscular strength and endurance. "nConclusion: Iranian women have a greater decline in cardiovascular fitness; muscular strength and endurance. The results of this study can be used as reference material for clinical studies in different age groups.
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