<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.uchunguzi wa watu 8,800 wenye umri wa zaidi ya miaka 50 ulionyesha kwamba shinikizo la damu na uzito kupita kiasi pia ziliathiri ubongo, lakini kwa kiwango cha chini zaidi.  <response>: scientists there studied 8,800 people over the age of 50, finding that high blood pressure and being overweight also contributed to decreased brain activity. 