Limitations
To our knowledge, the present study is the first study that examines the long-term effect of resistance training along with creatine supplementation on antioxidant indices in older adults. One of the limitation of the current study include the lake of measurement of nitric oxide metabolites. In addition, it is better to measure the level of muscle tissue at the same time as blood sampling in future studies to check the changes in oxidant/antioxidant indices more precisely.