Nicotinamide Supplementation Improves Physical Performance in Older Adults at Risk of Falls

To test the hypothesis, a randomized pilot clinical trial will be conducted using block allocation, double-blind (patient and evaluator), designed according to the SPIRIT guidelines for drafting a trial protocol. This study involves the implementation of guided home-based physical training by a physiotherapist (2 sessions per week for 4 weeks) combined with supplementation with nicotinamide (1.5 g/day) or placebo depending on the assigned group. Improvement in physical performance will be evaluated using the Short Physical Performance Battery (SPPB), handgrip strength test, quadriceps dynamometry, posturography, and near-infrared spectroscopy (NIRS) of the quadriceps. The RedCap software will be used for randomization and data analysis.