Clenching fists 'can improve memory'

Memory can be improved simply by clenching the fists, a study suggests. Clenching the right hand for 90 seconds helps in memory formation, while the same movement in the left improves memory recall, say US psychologists. via Pocket http://www.bbc.co.uk/news/health-22270716#sa-ns_mchannel=rss&ns_source=PublicRSS20-sa