Please assess the completion status of the following clinical trial:

Trial Title: A CFit Study - Acute Exercise

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Males and females ≥ 12 years of age~* CF diagnosis based on clinical features, supported by an abnormal sweat test (sweat chloride \> 60 mmol·L-1 \> 100 mg sweat) and, where possible, diagnostic genotyping~* No contraindications to performing exhaustive exercise~* Can understand and cooperate with the study protocol~* No increase in symptoms or weight loss in the preceding 2 weeks~Exclusion Criteria:~* Any non-pulmonary conditions that may impair exercise ability, such as musculoskeletal disorders (arthritis, joint or muscle disease) and cardiovascular disease (congenital heart disease or cardiomyopathy).~* Unstable co-morbid asthma (daily pulmonary function variability of \> 20%)~* Is pregnant during the initial screening process~* Unable to understand or cooperate with the study protocol due to learning difficulties or otherwise~* Not of a suitable age for testing~Exclusion during testing:~* Onset of acute infection~* Becomes and/or is tested to be pregnant following enrolment to the study~* Experiences significant hypoxaemia during visit 2 of the CFit_BL protocol (IRAS ID: 225310) which requires supplemental O₂. Under these circumstances, participants will be invited to continue their participation under the CFit_BL trial (IRAS ID: 225310)~* Unable to understand or cooperate with study protocol~* The individual does not wish to participate further

- Gender: ALL
- Minimum Age: 12 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Moderate vs. High-intensity exercise (randomised) (Type: EXPERIMENTAL): Compare the effects of a single session of moderate continuous exercise versus high-intensity interval exercise (MIE completed first)
- High-intensity vs. Moderate intensity exercise (randomised) (Type: EXPERIMENTAL): Compare the effects of a single session of moderate continuous exercise versus high-intensity interval exercise (HIIE completed first)

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