By forcing players to keep track of which cards have been played and which are still in play, they improve their recall skills. According to research, memory-intensive activities can help presatta. king.vent cognitive decline as people age. For instance, older adults who play card games like rummy on a regular basis tend to have better memory retention & cognitive flexibility than those who don't. When players successfully implement their strategies, the mental acrobatics required for Rummy not only maintain mental acuity but also give them a sense of satisfaction and success.