Please assess the completion status of the following clinical trial:

Trial Title: Cognitive Control and Physical Exercise

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: BASIC_SCIENCE
- Time Perspective: None
- Masking: SINGLE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~1. Age 60-75~2. English-speaking~3. Strongly right-handed~4. BMI \> 18.5 and \< 32~5. Post-menopausal (women only): no estrogen replacement therapy~6. Sedentary: VO2max \< 36 ml/kg/min for men age 60-75; \< 29 ml/kg/min for women age 60-75 (determined using Jones Formula Men = (60-(0.55\*AGE)) Women = (48-(.37\*AGE))~Exclusion Criteria:~1. MRI contraindications (e.g., metallic implants, pacemaker, weight \> 350 lbs, waist \> 55)~2. Hearing impaired/hearing aids, unable to read newspaper at arm's length with corrective lenses~3. Objective cognitive impairment~4. Ischemic changes, abnormal blood pressure responses, or any significant ectopy during aerobic capacity testing~5. Cardiovascular disease~6. Uncontrolled high blood pressure (systolic blood pressure ≥ 180 mmHg; or diastolic blood pressure ≥ 105 mmHg on two measures)~7. Current or recent (evidence of disease x 5 years) non-skin neoplastic disease or melanoma~8. Active hepatic disease (not a history of hepatitis) or primary renal disease requiring dialysis, primary untreated endocrine diseases, e.g., Cushing's disease or primary hypothalamic failure or insulin dependent diabetes (Type I or II).~9. HIV infection~10. Pregnant or lactating (participation allowed 3 months after ceasing lactation~11. Other medical disorders judge to interfere with study~12. Medications that target CNS (e.g., neuroleptics, anticonvulsants, antidepressants, benzodiazepines) within the last month~13. Women: any selective estrogen receptor modulator or aromatase inhibitor Men: androgen ablation/deprivation hormonal therapies~14. Any history of psychosis or electroconvulsive therapy~15. Psychotic disorder (lifetime)~16. Current or recent (within past 12 months) alcohol or substance abuse or dependence. Recent use (past month) of recreational drugs.~17. Brain disorder such as stroke, tumor, infection, epilepsy, multiple sclerosis, degenerative diseases, head injury, mental retardation~18. Imaged cortical stroke or large subcortical lacunae or infarct or space-occupying lesion (≥ 2 cubic cm). Other findings, e.g., periventricular caps or small white matter hyperintensities, do not result in exclusion~19. Diagnosed learning disability, dyslexia

- Gender: ALL
- Minimum Age: 60 Years
- Maximum Age: 75 Years
- Healthy Volunteers: t

Study Arms:
- Space Fortress and Exercise (Type: EXPERIMENTAL): Participants engage in aerobic exercise 4 times week and Space Fortress sessions 3 times a week for a total of 12 weeks.
- Control Games and Exercise (Type: ACTIVE_COMPARATOR): Participants engage in aerobic exercise 4 times a week and control game sessions 3 times a week for a total of 12 weeks.
- Control Games and Stretching (Type: ACTIVE_COMPARATOR): Participants engage in stretching/toning exercises 4 times a week and control game sessions 3 times a week for a total of 12 weeks.

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