Table 1. TIDieR checklist.

Item
Brief name	The EX-FRAIL CKD Exercise Programme.
Rationale	Exercise training is associated with improved health outcomes in adults with CKD. Evidence also suggests that home-based exercise interventions may improve outcomes in older adults.
Materials	Exercise guidebook, exercise diary and wrist/ankle weights.
Procedures	Exercise education session and weekly telephone-calls.
Provider	Exercise education was delivered by a physiotherapist. Telephone calls were performed by a physiotherapist or specialist trainee with relevant experience.
Modes of delivery	Face-to-face exercise education session followed by weekly telephone calls.
Location	Exercise education sessions were delivered in a private room at NIHR Lancashire Clinical Research Facility. Exercises were completed in a participant’s own home.
Frequency and duration	Participants received an education session that lasted approximately 60 minutes. Participants aimed to perform 3 exercise sessions at home per week, each lasting approximately 30–45 minutes.
Tailoring	Initial exercise levels were determined by frailty status, unless the physiotherapist determined otherwise due to safety concerns. If a participant could perform any of the exercises comfortably after week 1, exercise progression was discussed with the participant.
Modifications	An alternative exercise was provided if a participant was unable to perform an exercise as originally intended. If a participant was unable to complete the proposed repetitions, they were advised to perform a lower number initially.
Adherence and fidelity	Exercises were delivered as described in the exercise guidebook. If modification was needed, the participant was provided additional documentation. Adherence was assessed during telephone calls and through review of exercise diaries. Outcomes of telephone calls were discussed within the research team. See also ‘Intervention Adherence’ in ‘Results’ section.

CKD, chronic kidney disease. NIHR, National Institute of Health Research.