Free-living Experimental Sleep Conditions

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Dr. James LeCheminant, Department of Exercise Sciences

Evaluation of how well the academic objectives of the proposal were met

The purpose of the completed MEG from 2010 was to compare 20 obese and 20 normal- weight women under two separate free-living experimental sleep conditions (Condition 1: two consecutive nights of ≥8 hrs of sleep; Condition 2: two consecutive nights of

Evaluation of the mentoring environment

The primary components of the mentoring environment included: training/preparation, weekly individual follow-up, research group meetings, and cross-disciplinary mentoring. We feel our mentoring environment was successful. After initial training, students were able to run most aspects of the study. Frequent contact with me as their mentor also gave students the confidence to contact me to resolve problems during the research process.

List of students who participated and what academic deliverables they have produced or it is anticipated they will produce

Those specifically assigned to this study were: Tyler Clark, Andrew Black, Lora Romney, and at least 2 undergraduate students from the Psychology Department. Their academic deliverables are listed below.

Peer-reviewed manuscripts in currently in-process (we anticipate journal submission by December)

  • *L Romney, *T Clark, *A Black, M Larson, BW Bailey, JD LeCheminant. The effect of sleep deprivation on food motivation, diet, physical activity, and moods in lean and obese women. Expected to submit to the American Journal of Clinical Nutrition (2012-13).
  • JD LeCheminant, *L Romney, M Larson, BW Bailey, *T Clark, *A Black. Reliability of an Actigraph hip and wrist accelerometer to predict sleep in normal-weight and obese women. Expected to submit to the Journal of Sleep Research (2012-13).

Professional presentations

  • JD LeCheminant, *L Romney, *T Kimball, *A Black, BW Bailey, M Larson. The effect of sleep deprivation of free-living physical activity: a cross-over study. The Obesity Scoiety (Sep, 2012).
  • *T Clark, *B Hanlon, BW Bailey, M Larson, JD LeCheminant. Effect of a 45-minute exercise session on total activity in normal-weight and obese women. Med Sci Sports Exerc. 44:S3211 (June, 2012).
  • *L Romney, M Larson, BW Bailey, JD LeCheminant. The acute effect of sleep deprivation of free-living dietary intake in normal-weight and obese women. SWACSM (Oct, 2012).

*We expect there will be at least 2 more professional presentations to be submitted at a later date for presentation next year.

Description of the results/findings of the project

In short, we found that acute sleep deprivation did not influence food motivation in lean and obese women overall though it significantly influenced mood and blood pressure. In addition, we found a significant difference in energy intake among the sleep-restricted obese women during their first major of the meal of the day. We have interesting data to publish.

Description of how the budget was spent

As expected, the budget for this study was spent on participant reimbursement, research assistant wages, recruiting costs, and various supplies.