Please assess the completion status of the following clinical trial:

Trial Title: Optimizing Ankle Exoskeleton Assistance for Walking Across the Life Span

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Subjects must be able to walk for 60 minutes in a 90-minute time frame.~* Subjects are apparently free of cardiovascular, metabolic, and renal disease, which includes no signs or symptoms suggestive of cardiovascular, metabolic or renal disease.~* Subjects have no current musculoskeletal injury.~* Subjects need to be either 18-45 or 65+ years old.~These criteria meet the American College of Sports Medicine's 2015 guidelines for participant health screening prior to joining a moderate or moderate-to-vigorous exercise protocol. (Riebe et al., 2015).~Exclusion Criteria:~* Have dementia or an inability to give informed consent~* Have a musculoskeletal injury or feel pain while walking~* Have a history of dizziness and/or balance problems~* Have cardiovascular, heart, metabolic, or renal disease, or respiratory problems~* Smoke cigarettes~* Asthma~* Feel pain or discomfort in the chest, neck, jaw, arms during rest or exercise~* Have orthopnea or paroxysmal nocturnal dyspnea~* Have ankle edema~* Have palpitations or tachycardia~* Have a heart murmur~* Have had a heart attack~* Have diabetes~* Have a pace maker~* Have unusual shortness of breath with usual activities~* Are \<18 or 46-64 years of age~* Do not speak or understand English

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Young Adult Exoskeleton Users (Type: EXPERIMENTAL): Study participants who are 18-45 year old.
- Older Adult Exoskeleton Users (Type: EXPERIMENTAL): Study participants who are greater than 65 years of age.

Based on this trial design, predict the completion outcome and termination type (if applicable).