SHOCKING NEWS FROM THE WORLD OF SCIENCE: Fit at midlife may mean healthier brain, stronger heart later.

If you’re fit in middle age, you might be guarding against not only depression as a senior, but also dying from heart disease if you do develop depression, a new study suggests.

Among nearly 18,000 Medicare patients, the most fit were 16 percent less likely to develop depression, the researchers found. The most fit were also 56 percent less likely to die from heart disease if they developed depression, and 61 percent less likely to die from heart disease if they remained free of depression.

Not exactly a paradigm-shifting discovery.