TURNER, C.H., and A.G. ROBLING. Designing exercise regimens to increase bone strength. Exerc. Sport Sci. Rev., Vol. 31, No. 1, pp. 45–50, 2003. Exercise is a very effective way to strengthen bones, particularly during childhood and adolescence. A collection of studies from the clinic and laboratory have provided new insights into how bone building effects of exercise can be maximized. From the available data we have calculated an “osteogenic index” for exercises.