If the least active 25 percent of Americans matched the top quarter, they would need to add about 111 minutes of daily walking (or an equivalent activity) to their routine. But the rewards were significant: It could, in theory, increase their lifespans by up to 11 years.

If every American over the age of 40 was as physically active as the most active quarter of the population, they could expect to live an extra five years on average.

A recent study found that adding 111 minutes of daily walking could help you live 11 years longer. Here's experts want you to know about walking's benefits.