%0 Journal Article %T Exercise and Bone Mineral Density in Premenopausal Women: A Meta-Analysis of Randomized Controlled Trials %A George A. Kelley %A Kristi S. Kelley %A Wendy M. Kohrt %J International Journal of Endocrinology %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/741639 %U http://dx.doi.org/10.1155/2013/741639