This interesting Forbes article on busyness and aging points out that although studies show keeping busy helps aging baby boomers and the elderly maintain memory and cognitive skills, more research is needed to identify the right kind of “busyness.”
Busyness from multi-tasting and overly filling our days with unfulfilling and stressful activities may have the opposite effect.
http://www.forbes.com/sites/alicegwalton/2016/05/21/does-extreme-busyness-really-benefit-the-brain/#73826dd81fd3