Research:
Osteoporosis Prevention in Children and Adults; Body Composition Assessment; Pediatric Overweight

Teaching:
Nutrition Throughout the Life Cycle and Medical Nutrition Therapy.

Interests:
Dr. Lewis' primary area of research examines the bone responses to dietary interventions. He is collaborating on a multi-site trial with Baylor College of Medicine and the University of California, Davis. The trial, Osteoporosis Prevention Using Soy Isoflavones (OPUS), is examining the efficacy and safety of soy isoflavones in postmenopausal women. Additionally, he is conducting a zinc intervention trial in early pubertal children to examine the effects of zinc on bone turnover. Lastly, Dr. Lewis is examining the links between overweight, vitamin D status and bone quality in children.

Education:

Selected Publications/Presentations:
MWillis, C.M., Laing, E.M., Hall, D.B., Hausman, D.B., Lewis, R.D. (2007) A prospective Analysis of Plasma 25-hydroxyvitamin D Concentrations in White and Black Prepubertal Females in the Southeastern United States, American Journal of Clinical Nutrition 85(1):124-30.

Pollock, N.P., Laing, E.M., Modlesky, C.M., O’Connor, P.J., Lewis, R.D. (2006) Former College Artistic Gymnasts Maintain Higher BMD: A Nine-Year Follow-Up, Osteoporosis International 17:1691-7.

Lewis, R.D., Meyer, M.C., Lehman, S.C., Trowbridge, F.L., Bason, J.J., Yurman K.H., & Yin, Z. (2006) Prevalence and Degree of Childhood and Adolescent Overweight in from Rural, Urban and Suburban Georgia, Journal of School Health 76(4):126-132.

Stein, E.M., Laing, E.M., Hall, D.B., Hausman D., Kimlin, M., Johnson MA., Modlesky, CM.,Wilson, A.R., & Lewis, R.D. (2006). Serum 25-Hydroxyvitamin D concentrations in girls aged 4-8 y living in the Southeastern United States. American Journal of Clinical Nutrition 83:75-81.

Jewell D.E., Toll P.W., Azain M.J., Lewis R.D., Edwards G.L. (2006) Fiber but not conjugated linoleic acid influences adiposity in dogs. Vet Ther. 7(2):78-85.

Laing, E.M., Wilson, A.R., Modlesky, C.M., O’Connor, P.J., Hall, D.B., & Lewis, R.D. (2005) Initial Years of Recreational Artistic Gymnastics Training Improves Lumbar Spine Bone Mineral Accrual in 4 to 8 Year Old Females, Journal of Bone and Mineral Research Mar 20(3):509-19.

Ellis, K.J., Shypailo, R.S., Steinberg, F.M., Lewis, R.D., Young, R.L., & Wong, W.W. (2004) Reproducibility of Fan-Beam DXA Measurements in Adults and Phantoms, Journal of Clinical Densitometry 7(4):413-418.

Wilson, A.M.R. & Lewis, R.D. (2004) Disagreement of energy and macronutrient intakes estimated from a food frequency questionnaire and 3-day diet record in girls 4 to 9 years of age. Journal of the American Dietetic Association 104(3):373-8.

Cheong, J.M.K., Johnson, M.A., Lewis, R.D., Fischer, J.G., & Johnson, J.T. (2003) Reduction in modifiable osteoporosis-related risk factors in older adults in elderly nutrition programs. Family Economics and Nutrition Review, 15(1):83-91.

Cifuentes, M., Heymsfield, S., Johnson, M.A., Lewis, R.D. Modlesky, C.M., & Shapses, S. (2003) Bone turnover and body weight relationships differ in normal-weight compared to heavier postmenopausal women. Osteoporosis International, 14(2):116-22.

Poudevigne, M.S., O'Connor, P.J., Laing, E.M., Wilson, A.R., Modlesky, C.M., & Lewis, R.D. (2003) Body Images of 4-8 Year Old Girls at the Outset of Their First Gymnastics Class. The International Journal of Eating Disorders, 34:244-50.

Modlesky, C.M. & Lewis, R.D. (2002) Does exercise during growth have a long-term effect on bone health? Exercise and Sport Sciences Reviews, 30(4):171-6.

Laing, E. M., Massoni, J. A., Nickols-Richardson, S. M., Modlesky, C. M., O’Connor, P. J., & Lewis, R. D. (2002) A prospective study of bone mass and body composition in female adolescent gymnasts. Journal of Pediatrics,141:211-6.

Prior, B. M., Modlesky, C. M., Evans, E. M., Sloniger, M. A., Saunders, M. J., Lewis, R. D., & Cureton, K. J. (2001) Muscularity and the density of the fat-free mass in athletes. Journal of Applied Physiology, 90:1523-1531.

Caine, D., Lewis, R. D., O’Connor, P. J., & Howe, W. (2001) The effect of diet and intensive training on the growth and maturation of female gymnasts. Clinical Journal of Sports Medicine.11:260-70.

Nickols-Richardson, S. M., Modlesky, C. M., O'Connor, P. J., & Lewis, R. D. (2000) Premenarcheal gymnasts possess higher bone mineral density than controls. Medicine, Science, Sports, and Exercise, 32(1):63-69.

Micronutrients, Exercise and Bone, Mini-symposium, American College of Sports Medicine Annual Meeting, San Francisco, CA, May 2003

The Bone Response to Exercise: Is There an Optimal Program? American College of Sports Medicine Annual Meeting, St. Louis, MO, June 2002

Body Composition Assessment in Children and Adolescents, American Society for Clinical Nutrition, American College of Sports Medicine Annual Meeting, Baltimore, MD, May 2001

Vitamin D and Bone Health in the Elderly, American College of Sports Medicine Annual Meeting, Indianapolis, IN, June 2000.