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

The intervention will consist of daily supplementation with micronized creatine monohydrate (FullGas Sport Creatine 200 mesh) for 12 weeks. The intervention will start at the time of hospital discharge with a loading dose of 20g/day for 1 week, divided into 4 intakes of 5g to favor digestive tolerance (breakfast, lunch, snack and dinner). Subsequently, a maintenance dose of 5g/day will be continued for 11 weeks (breakfast). Creatine should be consumed with food to improve its absorption.

The control group will follow the same rehabilitation regimen as the intervention group and will receive a placebo with FullGas Sport microcrystalline cellulose. Its physical and organoleptic characteristics are the same as micronized creatine monohydrate. The dosage will be the same as that indicated for the study intervention: it will start at the time of hospital discharge with a loading dose of 20g/day for 1 week, divided into 4 intakes of 5g to favor digestive tolerance (breakfast, lunch, snack and dinner). Subsequently, a maintenance dose of 5g/day will be continued for 11 weeks (breakfast).