A new study of more than 1,000 adults, average age 33, found that meeting recommended physical activity guidelines isn't enough to counteract the 60-plus hours per week they spend sitting. To reduce heart disease risk and prevent accelerated aging, they need to sit less and work-out harder.
Read more: Prolonged sitting can sabotage health, even if you're young and active
According to a new study, the composition of beneficial microorganisms within the mouth differs over a range of subsistence strategies -- from nomadic hunter gatherers to farmers to industrialized groups.
Read more: Microbes in mouth reflect lifestyle choices
Along with defending against pathogens, the body's innate immune system helps to protect the stability of our genomes in unexpected ways -- ways that have important implications for the development of cancer, researchers are discovering.
Read more: Ancient immune defense system plays an unexpected role in cancer