Department of Kinesiology

School of Health and Human Sciences

Labs: Physical Activity and Cognition Laboratory

Lab Location

239 Coleman Building

Lab Contact

Dr. Jennifer L. Etnierjletnier@uncg.edu

Overview

The focus of this lab is on improving our understanding of the effects of physical activity on cognitive performance. Both single sessions of physical activity and physical activity programs have been shown to be causally linked to improvements in cognitive performance. However, we do not have a good understanding of how to use physical activity to achieve the greatest cognitive benefits. The PAC Lab is pursuing questions related to the mechanisms underlying these effects, the dose response nature of the effects, and the specific populations for whom exercise is most beneficial. Research conducted in this lab is often interdisciplinary in nature with on-going collaborations with faculty members in Applied Neuromechanics, Exercise Physiology, Nutrition, and Human Development Family Studies.

Lines of Research

  1. Understanding Mechanisms of the Effects of Physical Activity on Cognition

To enhance our ability to prescribe physical activity to benefit cognitive performance, it is important to understand why physical activity benefits cognitive performance. Our research has focused on several putative mechanisms including brain-derived neurotrophic factor (BDNF), irisin, brain function (using resting state functional magnetic resonance imaging, fMRI, and event-related potentials, ERPs), and brain structure (using MRI). Once mechanisms are more fully understood, this will facilitate our ability to use exercise in a way to maximally benefit cognitive performance. In addition, by understanding mechanisms, this may provide insight into ways that we can combine interventions (e.g., nutrition) with exercise to further benefit cognitive performance.

  1. Designing Physical Activity to Benefit Memory

At this point in time, we do not know exactly how to prescribe exercise in a way that we think will maximize its benefits. Variables to consider for both acute and chronic exercise studies include intensity, duration, and mode. Frequency and length of the intervention are also important considerations for chronic programs. Importantly, it is also possible that the ideal dose of exercise may differ dependent upon the cognitive task being assessed. Our work has focused on both memory and measures of executive function as we attempt to add to our understanding of dose-response effects.

  1. Physical Activity and Cognition in Special Populations

There is evidence to suggest that physical activity might be particularly beneficial for children and older adults. The explanation of this is that children are experiencing rapid brain growth and older adults are experiencing age-related cognitive decline. Hence, it is expected that these groups could particularly benefit from a physical activity program. In our lab, we study the effects of exercise on cognition across the lifespan, but also recognize that there may be others who are also particularly sensitive to the benefits of exercise. In particular, we have done research focused on person’s at genetic risk for Alzheimer’s disease and looking at the effects for children with ADHD.

Equipment

Equipment device name or image Purpose(s)
Lode cycle ergometer Used to implement exercise protocols in a laboratory setting and/or as a means to assess physical fitness (in conjunction with a metabolic cart or heart rate monitor)
Magnetic Resonance Imaging (MRI) Used to assess cerebral structure and cerebral function
Treadmill Used to implement exercise protocols in a laboratory setting and/or as a means to assess physical fitness (in conjunction with a metabolic cart or heart rate monitor)
Metabolic Cart Used for indirect calorimetry to measure oxygen consumption (VO2) and carbon dioxide production (VCO2) in the assessment of fitness.
Heart rate monitors Used to provide an objective measure of exercise intensity
Accelerometers Used to measure physical activity as steps or minutes.

Current Staff and Students