Education
Ph.D. Tufts University 1993
Research Interests
Our research interests include human nutrition and exercise studies on protein, carbohydrate and energy metabolism, dietary protein and energy requirements, body composition, obesity, weight loss, muscle strength, and muscle function with special emphasis on aging. We are also interested in how nutrition, exercise, and aging impact appetite and ingestive behaviors. Our recent research suggests that older people who habitually consume the Recommended Dietary Allowance for protein experience subtle declines in skeletel muscle size. Thus we seek to find the optimal protein intake for older and elderly people to consume. Our research also focuses on how protein metabolism, body composition, and glucose metabolism change in older people with changes in protein intake, body weight, and exercise (especially strength training). We are also interested in evaluating the effectiveness of compounds that are promoted to have ergogenic properties. The potential importance of the physical form of food (e.g. liquid versus solid) on appetite, ingestive behaviors, energy balance, and body weight control is also of great interest to our research team.
Our research includes the use of traditional metabolic balance techniques (with strict dietary control possible in a metabolic research kitchen), stable isotope infusion techniques (to measure in vivo acid turnover and incorporation into muscle tissues), whole body composition (hydrostatic weighing, plethysmography, dual x-ray absorptiometry, deuterium oxide dilution), the muscle biopsy technique (to obtain small samples of human skeletal muscle), and indirect calorimetry (to measure resting and exercise energy expenditure). We also highly value collaboration within and outside of Purdue to expand our interests, expertise, and research capabilities, as become available.
Teaching Interests
Topics in Nutrition, Fitness, and Health (F&N 488) - Review of current literature in nutrition as it relates to fitness and health with in-depth analysis of obesity. Exploration of career opportunities in nutrition, fitness, and health. Geriatric Nutrition (F&N 580) - Nutritional needs and problems of the aging, community and institutional food programs.
Grants
National Institutes of Health
US Whey Consortium
National Pork Board
American Egg Board
United States Department of Agriculture
Publications
Iglay, H. B., Apolzan, J. W., Gerrard, D. E., Eash, J. K., Anderson, J. C., & Campbell W. W. (2009). Moderately increased protein intake predominantly from egg sources does not influence whole body, regional, or muscle composition responses to resistance training in older people. J Nutr, Health Aging. 2:1'08-114.
Leidy, H. J., Bossingham, M. J., Mattes, R. D., & Campbell, W. W. (2009). Increased dietary protein consumed at breakfast leads to an initial and sustained feeling of fullness during energy restriction compared to other meal times. Br J Nutr. 6:798-803.
Campbell, W. W., Johnson, C. A., McCabe, G. P., & Carnell N. S. (2008). Dietary protein requirements of younger and older adults. Am J Clin Nutr. 5:1322-1329.
Stull, A. J., Thyfault, J. P., Haub, M. D., Ostund, R. D., Jr., & Campbell, W. W. (2008). Relationships between urinary inositol excretions and whole body glucose tolerance and skeletal muscle insulin receptor phosphorylation. Metabolism. 11:1545-1551.
Weinheimer, E. M., Martine, B. R., Weaver, C. M., Welch, J. M., & Campbell, W. W. (2008). The effect of exercise on water balance in pre-menopausal recreationally active women. J Am Diet Assoc. 10:1662-1667.)
Stull, A. J., Apolzan, J. W., Thalacker-Mercer, A. E., Iglay, H. B., & Campbell, W. W. (2008). Liquid and solid meal replacement products differentially affect postprandial appetite and food intake in older adults. J Am Diet Assoc 108, 1226-1230.
Paddon-Jones, D., Short, K. R., Campbell, W. W., Volpi, E., & Wolfe, R. R. (2008). Role of dietary protein in the sarcopenia of aging. Am J Clin Nutr 87(suppl), 1562S-1566S.
Thalacker-Mercer, A. E. & Campbell, W. W. (2008). Dietary protein intake affects albumin fractional synthesis rate in younger and older adults equally. Nutr Rev 66(2), 91-05.
Stull, A.J., Apolzan, J.W., Tahlacker-Mercer, A.E., Iglay, H.B., & Campbell, W.W. (2008). Liquid and solid meal replacement products differentially affect postprandial appetite and food intake in older adults. J Am Diet Assoc 108, 1226-1230.
Diaz, M.L., Watkins, B.A., Li, Y., Anderson, R.A., & Campbell, W.W. (2008). Chromium picolinate and conjugated linoleic acid do not synergistically influence diet- and exercise-induced changes in body composition and health indexes in overweight women. J Nutr Biochem 19, 61-68.
Paddon-Jones, D., Short, K.R., Campbell, W.W., Volpi, E., & Wolfe, R.R. (2008). Role of dietary protein in the sarcopenia of aging. Am J Clin Nutr 87(suppl), 1562S-1566S.
Thalacker-Mercer, A.E., & Campbell, W.W. (2008). Dietary protein intake affects albumin fractional synthesis rate in younger and older adults equally. Nutr Rev 66(2), 91-05.
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