If we can help people do more physical exercise - especially when they are at risk of illness or recovering from it - we can cut the number of deaths from conditions like heart disease and stroke.

BBC: Exercise on prescription

The researchers say their findings are not conclusive but suggest that men who want to improve their fertility might want to look at increasing the amount of physical exercise they do if they currently do little.

BBC: Prolonged TV viewing linked to lower sperm count

But according to the latest research, even when people do significant and regular exercise, they still increase their risks of serious illness from hours of physical inactivity.

CNN: Sitting for hours can shave years off life

We are killing ourselves with work and preparing our children to do the same by failing to teach them, either by example or through formal education, that exercise and physical health are important life concerns.

BBC: School PE lesson