Aquatic Power Training Dosing Strategies and Creatine Supplementation in Older Adults

This randomized controlled trial will investigate the effects of different aquatic power training dosing strategies and creatine supplementation on functional and multisystem adaptations in community-dwelling older adults. Participants will be randomly allocated to one of five parallel groups: (1) aquatic power training regulated according to rating of perceived exertion during the first repetition (RPE-1) plus placebo; (2) aquatic power training using a conventional time-based dosing strategy plus placebo; (3) time-based aquatic power training plus creatine supplementation; (4) sedentary control plus placebo; or (5) sedentary control plus creatine supplementation. The intervention will last 16 weeks. Aquatic training will be performed three times per week for approximately 60 minutes per session. Participants allocated to creatine supplementation will receive 3 g/day of creatine monohydrate, whereas the corresponding placebo groups will receive a visually indistinguishable placebo following the same supplementation schedule. The primary outcomes will assess body composition,…

• Change in Body Composition via Dual-Energy X-ray Absorptiometry (DXA)
• Change in handgrip strength
• Change in lower limb Isokinetic muscle strength
• Change in upper limb Isokinetic muscle Strength

1. Study completion expected

   May 15, 2027

2. Primary completion expected

   Apr 30, 2027

3. Registered

   Nov 3, 2026

4. Started

   Oct 15, 2026