Researchers in 黑料不打烊鈥檚 Ellmer College of Health Sciences are looking for volunteers between 40 and 79 years old, both with and without chronic ankle instability. Participation involves 3 lab sessions lasting 2.5 hours each, followed by 7 days of activity monitoring. Each lab testing session will include non-invasive testing of balance, gait, reaction time, and strength, as well as ultrasound imaging of your ankles and surveys about perceived function. There is no cost to you for participating, and you鈥檙e free to withdraw from the study at any time without any penalty. Participants are paid $125 for completion of the study. If you are interested in participating, please contact the primary investigator, Ryan McCann at 757-683-6131 or rmccann@odu.edu.