Please assess the completion status of the following clinical trial:

Trial Title: Atrial Fibrillation Trial to Evade Recurrence: effectS of Hiit Before electrO-Cardioversion for 3-weeKs

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. Persistent atrial fibrillation~2. Eligible and scheduled for electro-cardioversion at UOHI~3. Rate controlled with a resting ventricular rate of equal to or less than 100bpm~4. Between 18-85 years of age~5. Owns a Smartphone~6. Physically able to participate in exercise~7. Willing and able to provide written, informed consent~8. Willing and able to return for follow-up visits~9. Willing and able to provide daily ECG recordings using the AliveCor system for the duration of the study.~Exclusion Criteria:~1. Participating in routine exercise training (more than two times per week) in the past 3 months~2. Atrial Flutter secondary to ablation~3. Unstable angina~4. Diagnosed with severe mitral or aortic stenosis, hypertrophic obstructive cardiomyopathy~5. Pregnant, lactating or planning to become pregnant during the study period~6. Diagnosed with rheumatic heart disease

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Study Arms:
- High-intensity interval training (HIIT) (Type: EXPERIMENTAL): Participants in the HIIT group will receive 3-weeks of tri-weekly supervised exercise sessions at the University of Ottawa Heart Institute prior to their scheduled electro-cardioversion. The session will last 23 minutes in duration and consist of a 2-minute warm-up at 50% of peak power output (PPO), 2 x 8-minute interval training blocks of 30 seconds at 80-100% of PPO interspersed with 30-seconds of active recovery and a 1-minute cool down at 25 % of PPO. The sessions will be lead by a Registered Kinesiologist.
- Usual Care Control (Type: NO_INTERVENTION): Participants assigned to the control group will have usual care, which involves no behavioural interventions leading up to their electro-cardioversion.

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