Method
The present study is a two-armed randomized controlled intervention trial over 1 year. All participants were informed about the procedures and provided informed written consent. The study is in accordance with the Declaration of Helsinki, and received ethical approval of the German Sport University (no. 31/2018). Anthropometric data, maximum strength and rate of force development of handgrip strength and agility via the agility challenge for the elderly (ACE) were assessed before and after the intervention period. All testing session were conducted according to established standard operational procedures at the laboratory and were performed at the similar time of day for each participant.