Seniors who want to stay sharp as they age should hit the treadmill, elliptical or exercise ... These included processing speed, short-term working memory, long-term episodic memory, planning ...

Here’s how to do HIIT on a treadmill: Set the treadmill to flat. Walk at 2 mph for 5 minutes to warm up. Run at your maximum speed for 30 seconds. Walk vigorously for 60 seconds. Repeat 5 to 10 ...