This study is designed as a randomized controlled clinical trial with an individual-level unit of randomization. A total of 40 eligible participants, after careful verification of the inclusion and exclusion criteria, completion of baseline assessments, and provision of written informed consent, will be randomly allocated to one of four study groups: control, aquatic exercise, land-based exercise, and combined exercise.
Participants will be assigned to the study groups using a simple randomization method, with an equal allocation ratio of 1:1:1:1. Each participant will therefore have an equal and independent probability of being allocated to any of the four groups. The random allocation sequence will be generated using a computer-based random number generation procedure implemented in SPSS statistical software (version 26).
The generation of the randomization sequence will be performed by an independent researcher who is not involved in participant recruitment, baseline assessment, intervention delivery, or data analysis.
To minimize the risk of selection bias and to preserve internal validity, strict allocation concealment will be maintained until the point of final group assignment. The randomization results will be placed in sequentially numbered, opaque, sealed, and light-impermeable envelopes prepared by the independent researcher. These envelopes will be securely stored and opened strictly in the order of participant enrollment.
The investigator responsible for participant recruitment and baseline assessments will remain blinded to the allocation sequence and group assignments until the envelope corresponding to the enrolled participant is opened. Each envelope will be opened only after eligibility confirmation, completion of baseline measurements, and signing of the informed consent form. This procedure ensures that neither the investigators nor the participants can predict or influence group assignment.
Due to the nature of the exercise interventions, blinding of participants and intervention providers is not feasible. However, where possible, outcome assessments will be conducted by an independent assessor who is blinded to group allocation in order to minimize detection bias. All procedures related to randomization, allocation concealment, and group assignment will be fully documented and made available for review by the Ethics Committee or relevant regulatory authorities upon request.