Research Study Participation

• Age 18 to 30 years
• Enrolled as a student at UCF
• Not currently pregnant
• Willing to wear an accelerometer (like a wrist watch) for seven days

• A male or female (18-54 years old)
• Resistance trained per ACSM guidelines ≥ 6 months.
• Participate in a form of bicep curls at least 1x a week for ≥ 6 months.

• availability for an in-person study session at one of the University of Central Florida locations
• aged 18-64
• Full muscular control of your upper extremities that would allow you to perform repetitive hand grasp movements required for this study

• Aged 60 years or older
• Have normal cognitive function (based on results from the Mini-Mental State Examination [MMSE] or Telephone Interview for Cognitive Status)
• Are willing to perform grip strength tests and provide informed consent
• Fluent in English

• Be 18-35 years old
• Currently pain free
• English speaking

• Are 18–50 years old.
• Have had low back pain for more than 12 weeks, rated 3/10 or higher in the past 48 hours.
• Are resistance trained (2x/week for the past 8 weeks

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