In this study, we want to learn more about brain and body outcomes in young adults with and without a history of a concussion from a sport. By learning more about you and your lifestyle, it will help us to inform how we help and rehabilitate sport-related concussions in young adults.

In this study, we want to learn more about mental health stigma and resource utilization. We also want to learn how stigma affects attitdues towards mental health and mental health resources in collegiate athletes.

Individuals with a history of anterior cruciate ligament (ACL) injury and have had an ACL reconstruction (ACLR) are at a greater risk for developing osteoarthritis. The greater risk for developing osteoarthritis is likely caused by too little force or physical activity applied to the knee during weightbearing tasks such as walking. To reduce this decrease in forces during walking following an ACLR, we must first develop effective treatments that can train a person to walk in a way that reduces their risk of developing osteoarthritis. The purpose of this research study is to determine the feasibility and the initial effects of a 6-week training program designed to improve walking mechanics of individuals with an ACL reconstruction.

The purpose of this study to is assess changes in knee joint health before and after 8 weeks of physical activity participation in individuals with a history of anterior cruciate ligament reconstruction (ACLR) 6 months to 5 years ago.

In this study, we want to learn more about mental health stigma and mental health history. We also would like to learn about how these factors affect a person's willingness to participate in therapy.

The purpose of this study is to learn more about how people feel about staying safe during sports and concussion safety. This study will focus on participants who identify with underrepresented racial and ethnic backgrounds.

To understand the current health and well-being of athletes during the COVID-19 pandemic.

Have you recently had an anterior cruciate ligament re-injury and will be undergoing revision anterior cruciate ligament reconstruction surgery? If so, you may be able to participate in a study assessing the associations between walking movement and physical activity with knee joint health. Compensation provided.

Are you scheduled for or have you recently undergone ACL reconstruction surgery? You may be able to participate in a study research study to help us learn if a new form of rehabilitation improves outcomes. All rehabilitation/physical therapy costs are covered by the study. Compensation is also provided. All of the groups will receive standard care treatment, but two of the groups will also receive different types of vibration.

The purpose of this study is to evaluate an educational platform for concussion education.