Ph.D. Tufts University 1993
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.
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.
National Institutes of Health
US Whey Consortium
National Pork Board
American Egg Board
United States Department of Agriculture
Apolzan JW, Leidy HJ, Mattes RD, Campbell WW. (2011 in press). Effects of food form on food intake and postprandial appetite sensations, glucose and endocrine responses, and energy expenditure in resistance trained vs. sedentary older adults. Br J Nutr.
Conley TB, Apolzan JW, Leidy HJ, Greaves KA, Lim E, Campbell WW. (2011 in press). Effect of food form on postprandial plasma amino acid profiles in older adults. Br J Nutr.
McCrory MA, Campbell WW. (2011). Effects of eating frequency, snacking, and breakfast skipping on energy regulation: symposium overview. J Nutr. 141:144-147.
Laan DJ, Leidy HJ, Lim E, Campbell WW. (2010). Effects and reproducibility of aerobic and resistance exercise on appetite and energy intake in young, physically active adults. Appl Physiol Nutr Metab. 35(6):842-847.
Leidy HJ, Tang M, Armstrong CLH, Martin CB, Campbell WW. (2010 in press). The effects of consuming frequent, higher protein meals on appetite and satiety during weight loss in overweight/obese men. Obesity [Epub Sep. 16, 2010].
O'Connell DN, Weinheimer EM, Martin BR, Weaver CM, Campbell WW. (2010 in press). Water turnover assessment in overweight adolescents. Obesity [Epub Sept 16, 2010].
Campbell WW, and Tang M. (2010). Protein intake, weight loss, and bone mineral density in postmenopausal women. J Geronotol A Biol Scie Med Sci 65(10):1115-1122.
Thalacker-Mercer AE, Fleet JC, Craig BA, Campbell WW. (2010). The skeletal muscle transcript profile reflects accommodative responses to inadequate protein intake in younger and older males. J Nutr Biochem 21(11):1076-1082.
Weinheimer EM, Sands LP, and Campbell WW. (2010). A systematic review of the separate and combined effects of energy restriction and exercise on fat-free mass in middle-aged and older adults: Implications for sarcopenic obesity. Nutr Rev 68(7):375-388.
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