Effect of Micronized Creatine Monohydrate on Muscle Mass, Strength and Performance in Older Adults Submitted to Total Knee Arthroplasty

Double-blind randomized placebo-controlled clinical trial with two parallel arms. The main objective is to evaluate the efficacy and safety of creatine supplementation in older adults who have been operated on for total knee arthroplasty and undergoing a usual rehabilitation program. The intervention will consist of daily creatine monohydrate supplementation for 12 weeks. The intervention will start after surgery with a loading dose of 20g/day for 1 week and then continue with a maintenance dose of 5g/day for 11 weeks. Main outcome mesures included muscle mass, muscle strenght, sarcopenia, frailty, functional capacity and physical performance and will be assessed at baseline, 3 and 6 months follow-up.