Aim. To explore the effects of long-term Shadowboxing exercise in prevention of osteoporosis in the aged. Methods. Sixty old people, 20 males and 40 females with an average age of (67.0 ± 1.3) years, were divided into two groups: control group without conscious exercise (n = 32), and exercise group with Shadowboxing exercise(n = 28). The bone mineral density (BMD) of lumber spine(L2-4) and proximal femur(neck of femur, torch, wards triangle) of 60 old people was measured by double energy X-ray absorption (DEXA) made in American Norland Corporation. Results. The BMD of lumber spine and proximal femur in the Shadowboxing exercise group were significantly higher than those of the controls (t = -6.63 to -2.23, P < 0.05). The BMD was insignificantly correlated with the exercise year over 5 years (t = 0.08 ∼ 1.60, P > 0.05). Conclusion. Shadowboxing exercise increases the BMD of the aged people effectively. With time passed, the prevention of shadowboxing exercise against osteoporosis is limited.