Tracking weight change, insulin resistance, stress, and aerobic fitness over 4 years of college

ABSTRACT

Objective: To determine if weight gain is accompanied by development of insulin resistance (IR) during 4 years in college. Participants: Two cohorts of college students were enrolled in fall semesters 2009 and 2010 and tracked for 4 years. Methods: Following a 12-hour fast, subjects reported for measurement of body mass index (BMI), perceived stress (PSS), aerobic fitness, and blood glucose, insulin, and lipids. Results: In the first year, 33% of subjects were overweight or obese, and 20% were hyperinsulinemic. Year 4 had 29 remaining subjects with disproportionate attrition of overweight and obese individuals. Just over half the subjects gained weight (WI), whereas nearly 30% lost considerable amounts (WD). WD showed significant decline in fasting insulin, low-density lipoprotein (LDL) cholesterol, and PSS from year 1. WI was primarily highly fit men who did not demonstrate increased IR. Conclusion: WI was not associated with IR over 4 years of college.

KEYWORDS:

• Aerobic fitness
• BMI
• insulin resistance
• stress
• weight

Acknowledgments

The authors thank Jessica Richards and Gary White for assistance in preparing tables and figures. The authors also thank the college students who volunteered as lab assistants and subjects.

Conflict of interest disclosure

The authors have no conflicts of interest to report. The authors confirm that the research presented in this article met the ethical guidelines, including adherence to the legal requirements, of the United States and received approval from the Institutional Review Board of the University of Southern Indiana.

Funding

The study was supported by the Pott College of Science and Engineering SERGA and Student Endeavor Grants.