Cross-sectional age-related differences in flexibility of older adults aged 55–86 years of varying activity levels were examined. Shoulder abduction and hip flexion flexibility measurements were obtained from 436 individuals (205 men, years; 231 women, years). Total physical activity was assessed using the Minnesota Leisure-Time Physical Activity Questionnaire. Shoulder abduction showed a significant decline averaging 5？degrees/decade in men and 6？degrees/decade in women. Piecewise linear regression showed an accelerated decline in men starting at the age of 71 years of 0.80？degrees/year, whereas in women the onset of decline (0.74？degrees/year) was 63 years. Men and women showed a significant decline in hip flexion (men: 6？degrees/decade; women: 7？degrees/decade). Piecewise linear regression revealed a rate of decline of 1.16？degrees/year beginning at 71 years in men and in women a single linear decline of 0.66？degrees/year. Multiple regression analysis showed that age and physical activity accounted for only 9% of the variance in hip flexion in women and 10% in men, with age but not physical activity remaining significant. Similarly for shoulder abduction, age was significant but not physical activity, in a model that described 8% of the variance for both sexes. 1. Introduction As indicated in a recent systematic review by our group [1], there is conflicting information regarding both the relationship between flexibility training interventions and functional outcomes and the relationship between improved flexibility and daily functioning; health benefits have not yet been established. The comparison of studies in this area to provide a prescription of the flexibility is complicated by the variety of limb ranges of motion studied, testing procedures utilized, and methods of assessing physical activity levels. Furthermore, this component of physical health has been somewhat neglected or forgotten in the current literature despite the lack of evidence for recommendations of the amount and type of flexibility needed for health in older adults. Further, despite this lack of a synthesis of the literature to support the recommendation of the inclusion of a flexibility component to older adult exercise programs, many older adult activity programs place a considerable emphasis on flexibility. The present study attempts to add additional insight to this area by presenting the relationship between declines in flexibility across age and functional outcomes in a large sample of individuals representing the older adult age range. Joint flexibility may decrease
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