Test your knowledge of this week’s health news.

A study that used activity trackers to monitor babies found associations between infants’ movement and levels of fat.

Taking an appetite suppressant produced by gut bacteria may help increase the value of moderate exercise for weight loss, according to a new study.

High intensity interval training (HIIT) is a type of exercise that combines short bursts of intense activity with periods of rest. Learn about the potential benefits here.

New research finds millions of people are getting enough calories but not enough essential nutrients. We asked leading researchers how to fix the problem.(Image credit: Meghan Dhaliwal/for NPR)

Scientists have come to realize that flu vaccines are less effective for people who are overweight or obese. Now researchers are trying to figure out why and hope to develop better vaccines.(Image credit: Derek Davis/Portland Press Herald/Getty Images)