Periodicals>Newspaper Article:  Reynolds, Gretchen (FEB. 7, 2018), Lift Weights, Eat More Protein, Especially if You’re Over 40, New York Times, Retrieved on 2018-03-20

Source Material [www.nytimes.com]

Electronic/World Wide Web>Internet Article:  Reynolds, Gretchen (APRIL 15, 2015), The Right Dose of Exercise for a Longer Life, NYT, Retrieved on 2015-04-27

Source Material [mobile.nytimes.com]

Electronic/World Wide Web>Internet Article:  Reynolds, Gretchen (September 28, 2011), How Exercise Can Strengthen the Brain, New York Times, New York, Retrieved on 2011-09-30

Source Material [well.blogs.nytimes.com]