IRCT2017101423002N4 IRCT 2017-10-31 Investigator Effect of resistance training and Epicatechin on Sarcopenia Improvement of muscle strength and circulatory levels of plasma Follistatin and Myostatin following resistance training and Epicatechin supplementation in sarcopenic older adults 2017-04-08 anticipated 62 Complete https://irct.ir/trial/19739 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Factorial, Purpose: Health service research. N/A Sarcopenia. Intervention 1: Exercise+Placebo group: participants of this group performed 8 weeks resistance training (at 5 to 6 p.m., three sessions per week, each session took approximately 60 minutes, with 60-80% of one repetition maximum). In addition, during this 8-week period this group received one capsule similar to Epicatechin capsules (in terms of color and shape) with 200 ml water daily, at the same time as the supplement group (one hour before doing resistance training, at 4 p.m.). Intervention 2: Placebo group: participants of this group will receive one capsule similar to Epicatechin capsules (in terms of smell and shape) daily with 200 ml water for 8 weeks, at the same time as the supplement group (at 4 p.m.). Intervention 3: Exercise+supplement group: participants of this group performed 8 weeks resistance training (at 5 to 6 p.m., three sessions per week, each session took approximately 60 minutes, with 60-80% of one repetition maximum). In addition, during this 8-week period this group consumed one Epicatechin capsule daily (1 mg/kg/day), with 200 ml water, one hour before doing resistance training (at 4 p.m.). Intervention 4: Supplement group: participants of this group consumed one Epicatechin capsule daily (1mg/kg/day) with 200 ml water, at 4 p.m. for 8 weeks.