We are doing this study to learn if exercise impacts the effect of social tasks on energy use and heart function. Since exercise may impact metabolic factors such as energy use as well as the impact of social situations on cardiovascular disease, we want to see how exercise impacts the effect of social situations on energy and metabolism, and whether this may affect your heart health.

The Lower Extremity Assessment Protocol (LEAP) is a program to prevent reinjury and promote long-term health by characterizing muscle function, evaluating movement performance, and monitoring patient-reported outcomes (e.g., pain). The purpose of this study is to learn more about the outcomes following orthopaedic surgery after a lower limb injury. *This study is a collaboration with the UNC Sports Medicine Institute*

We now know there is a link between sedentary behavior (e.g., sitting) and heart disease. However, we do not yet fully understand if sedentary behavior performed in different settings and situations (e.g., sitting alone watching television vs sitting with friends at a bar) differentially impacts heart disease risk. This is what this study aims to find out.

Many young athletes who tear their ACL have trouble getting back to sport or suffer a second ACL injury once they do. We aim to improve athletes' ability to get back to sport safely. We want to make the activities athletes perform in rehabilitation more closely match the demands of what they do once they return to their sport. We also aim to develop low-cost ways to measure how the knee is moving during those activities. *This study is a collaboration with the UNC Sports Medicine Institute*

We are looking for young adults 18 to 30 years old who have had a concussion in the past 5 years to take part in a six-week study to learn if mindfulness can help outcomes after a concussion.

This is a research study to collect the names and contact information of those interested in future research participation opportunities for concussion and TBI studies.

In this study, we want to learn more about young adults with a history of concussion and their relationship with stress and mindfulness. This will help us to create concussion prevention and rehab plans to improve recovery.

Do you sit too much at work or home? There is strong evidence for an association between sitting and cardiovascular diseases such as coronary heart disease and stroke. In this study, we want to identify strategies to break up sitting for long periods of time. Compensation will be provided.

In the study we are looking at how a bout of walking performed prior to prolonged sitting impacts arterial stiffness (non-invasive cardiovascular measure). This is important as increased arterial stiffness from prolonged sitting increases the risk for cardiovascular disease.

In this study, we want to learn about the effects of different kinds of force on the knee when walking on a treadmill. We will do this by looking at MRI images of knee cartilage in people with and without a history of ACL reconstruction.