ResearchResearch and Professional BriefThirst-Drinking, Hunger-Eating; Tight Coupling?
Section snippets
Participants
Participants (n=128) were recruited for this observational study through public advertisements and signed an informed consent form approved by the Institutional Review Board of Purdue University. Eligibility criteria included weight-stable (<3 kg weight change over previous 3 months), man or woman, aged 18 to 60 years, not taking medication reported to affect appetite or body weight, and in good health. Participants had a sedentary lifestyle (physical activity level 1.55) (22), determined by
Results and Discussion
No evidence was obtained indicating that thirst promotes eating and hunger promotes drinking. Thirst was not correlated with energy intake and hunger was not correlated with drinking during the same hour over the 7-day period (r=0.08 and r=0.04, respectively). Further, thirst was not a significant predictor of energy intake and hunger was not a significant predictor of drinking when entered into a linear regression model. Moreover, thirst was not correlated with drinking (r=0.03). Hunger was
Conclusions
The failure to reveal significant associations between either thirst or hunger and ingestion of energy-yielding beverages, as well as the absence of strong associations between hunger and eating or thirst and drinking, raises questions about the reliability of these homeostatic relationships in the current environment. Although shortcomings in dietary and appetitive assessment tools may be responsible, it is likely that other influences on ingestive behavior overwhelm appetitive sensations. The
F. McKiernan is a recent MS graduate, College of Science, Purdue University, West Lafayette, IN
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Cited by (0)
F. McKiernan is a recent MS graduate, College of Science, Purdue University, West Lafayette, IN
R. D. Mattes is a professor of foods and nutrition, Department of Foods and Nutrition, College of Science, Purdue University, West Lafayette, IN
G. P. McCabe is associate dean of academic affairs, College of Science, Purdue University, West Lafayette, IN
J. H. Hollis is an assistant professor, Department of Food Science and Human Nutrition, Iowa State University, Ames; at the time of the study, he was a graduate student, Department of Foods and Nutrition, Purdue University, West Lafayette, IN