| Study period | ||||
---|---|---|---|---|---|
Timepoint | Enrolment and baseline allocation 0 week | Intervention 1–12 weeks | Post-intervention 13 weeks | Follow-up 13–24 weeks | Close-out 25 weeks |
Enrolment | Â | Â | Â | Â | Â |
 Eligibility screen | X |  |  |  |  |
 Informed consent | X |  |  |  |  |
 Randomization and allocation | X |  |  |  |  |
Exercise/vitamin D intervention | Â | X | Â | Â | Â |
Assessment | Â | Â | Â | Â | Â |
 Blood parameter tests | X |  | X | X |  |
 Body composition | X |  | X | X |  |
 Ankle-brachial index | X |  | X | X |  |
 Physical fitness factors | X |  | X | X |  |