Aseem Malhotra:

Nearly one in three people alive today is overweight or obese -- two out of three adults in the United States -- and no country has lowered its obesity rate since 1980.

Sara Germano:

Roughly 83 million Americans age 6 and over, or about 28% of the population, reported that they did not once participate in any of 104 specific physical activities in the last calendar year.

Rafil Kroll-Zaidi:

Most lost body weight is exhaled as carbon dioxide.