ACL Group:

• Age of 18-35 years
• History of only one ACL reconstruction within the previous 2 years
• Medical clearance for return to unrestricted activity

Uninjured Group:

• Age of 18-35 years
• No history of lower limb surgery
• No history of significant lower limb injury within previous 6 months (defined as seeking medical attention, or missing >3 consecutive practices or games)

• 18-35 years old with no current or history of low back pain or spine surgery
• Able to carry a 35 pound rucksack (heavy backpack)
• Able to perform a single leg squat on both legs

• Available for an in-person session at the University of Central Florida campus or Limbitless Solutions facility
• Between the ages of 18 and 64 and able to consent
• Have never used the Limbitless Solutions myoelectric prosthesis or Flex controller
• Have full control of upper extremities
• Have not had an injury to hands or arms that is currently impacting upper extremity control

• Youth (between ages 14 and 17) who have a history of engaging in suicide-related behaviors (i.e. suicide ideation, suicide attempts) and/or who exhibit risk factors (i.e., history of mental illness, substance use, self-injury) associated with suicide risk.
• Participants must be able to speak and read English
• Participants must have access to an internet-connected device with Zoom (online) and/or be willing to participate in a group session in person
• Participants must provide assent with parental consent

• At least 18 years old
• Either report having a history of low back pain (LBP) (at least 3 episodes of pain in the last year or 5 episodes in your lifetime) OR have no history of LBP throughout your lifetime to be in the non-LBP group
• An episode of LBP means that you had pain in the lower back region that made you change your daily activities for at least 24 hours.

• At least 14 years old
  • Individuals under the age of 18 must be accompanied by a parent
• Have at least 3 years of ballet experience
• Currently practice dance technique
  • At least 1 hour per week over the past 6 months
• Are familiar with basic ballet terminology

• Are at least 18 years old
• Currently identify as:
  • a dancer
  • a dance parent
  • a dance teach/choreographer/coach
  • a dance studio/company/program director or equivalent

• Female endurance athlete between the ages of 18 and 39 years
• Actively engaged in > 300 minutes (5 hours) of aerobic exercise per week in the previous 6 months.
• Participants must also be able to read English

• Ages of 18 and 50 years old.
• Do not have any health-related conditions, diseases, or previous injuries that currently affect your lower extremities.

• Ages: 18-75 
• Chronic low back pain (lasting 3+ months) 
• Pain intensity: 3/10 or higher in the past 24 hours 
• Access to email and intern