Men who wear hard hats may have considerably healthier sperm than their white-collar bosses, a new Harvard study suggests.

Workers who regularly lift or move heavy objects were found to have nearly 50 per cent higher sperm counts than desk-bound workers.

They also had higher levels of testosterone, the male sex hormone that regulates sex drive (or libido) as well as muscle mass and sperm production.

See Also:

Greek Conductor to lead Byzantine Chant Ensemble in King Charles III Coronation

Sperm quantity, motility and testosterone levels are key factors in male fertility – and sperm counts worldwide are believed to have nearly halved over the past five decades, with scientists suspecting a cocktail of environmental, dietary and lifestyle factors is to blame.

Read more: Euronews