(HealthDay News) -- If you are middle aged and out of shape, it isn't too late to get active and improve your health, the American Heart Association says.
A study in the journal Circulation showed that heart stiffness -- a potential precursor to heart failure -- decreased for middle-aged men who engaged in two years of the right kinds and amount of exercise.
Study participants who did high- and moderate-intensity exercise up to five times weekly had better heart elasticity and improved the way in which their bodies used oxygen, the research found.
The Heart Association recommends weekly exercise should include: