Principal Investigator:

Loretta DiPietro, PhD
Associate Fellow,
John B. Pierce Laboratory

Associate Professor of Epidemiology
Yale University School of Medicine


Research Interests

Many of the functional changes commonly ascribed to the aging process per se are similar to those induced by enforced bed rest or by removal from the earth's gravitational field (such as in extended space flights). Thus, sedentary behavior (or hypogravity) becomes a useful model for the study of aging. We propose that the portion of aging due to inactivity (that is, facultative aging) can be modified and, perhaps, reversed, thereby extending the maintenance of functional well-being closer to the time of life-expectancy. We use exercise as a counter-measure for aging in our research. With either single bouts or more long-term aerobic exercise training we can determine the degree of adaptation that occurs in a number of structural and functional indicators, such as body fat and muscle structure and lipid, glucose, and insulin regulation. We have been quite successful in training older people over the past eight years, using a variety of aerobic and resistance training techniques. We maintain on-site training facilities in Southbury and in West Haven, CT. Recently, we have begun recruiting older people from our neighborhood Senior Centers, allowing us to extend the benefits of our work to our own New Haven community.


Current Projects

Current projects include a randomized-controlled trial of aerobic exercise training on glucose, glycerol, and insulin regulation in older women with and without visceral obesity, and a cross-sectional study of the effects of a single exercise bout on cortisol, growth hormone and insulin-like growth factor 1 (IGF-1) in older and younger, trained and untrained, people. In addition, planned studies include the validation of a newly-developed lifetime physical activity questionnaire with various physiological variables in a large community-based sample of older adults.


Representative Publications

DiPietro L, Kohl HW, III, Barlow CE, and Blair SN. Improvements in cardiorespiratory fitness attenuate age-related weight gain in healthy men and women: The Aerobics Center Longitudinal Study. Int. J. Obesity. 22:55-62, 1998.

DiPietro L, Seeman TE, Stachenfeld NS, Katz LD, and Nadel ER. Moderate-intensity aerobic training improves glucose responses in aging independent of abdominal adiposity. J. Amer Geriatr. Soc. 46:875-879, 1998.

DiPietro L, Katz LD, and Nadel ER. Excess abdominal adiposity remains correlated with altered lipid concentrations in healthy older women of normal body weight. Int. J. Obesity. 23:432- 436, 1999.

DiPietro L. Physical activity in the prevention of obesity: current evidence and research issues. Med. Sci. Sports. Exerc. 31:542-546, 1999.

DiPietro L. Physical activity in aging: changes in patterns and their relations to health and function. J Gerontol: Med. Sci. 56A:1-10, 2001.

Dziura J, Mendez- de Leon C, Kasl SV, and DiPietro L. Physical activity attenuates aging-related weight loss: The Yale Health and Aging Project, 1982-1994. (Submitted to JAMA).


Loretta DiPietro, PhD, MPH
Principal Investigator
Andrew Grabarek, BS
Research Assistant