Tightening hand grip helps brain perform: study

Dr. Lisa Young, a nutritionist and professor at New York University, and Stuart Elliot, an advertising columnist for The New York Times, talk to the "CBS This Morning" co-hosts about the nutrition of flavored water and how they're being marketed.

The number of Lyme disease cases have tripled in the past 20 years. Dr. Holly Phillips discusses why the number of cases has skyrocketed, how the disease is transmitted via ticks, and what myths and realities persist about the insects and the disease.

"CBS This Morning" contributor Lee Woodruff reports on the latest trends in wearable fitness technology.

A new study finds that women taking 1,000 milligrams of calcium a day have a lower risk of dying, contradicting previous studied linking calcium to an increased risk of heart attacks. Dr. Holly Phillips explains.

CBS News contributor Dr. David Agus, director of the Westside Cancer Center at the University of Southern California, talks to the "CBS This Morning" co-hosts about why the cost for a genetic test for breast cancer is so high.

CBS News' Ben Tracy reports on an inventor whose idea for an artificial limb design was borne out of his own experience losing his lower leg in a sporting accident.