Men who watch their favourite sports team compete experience a similar testosterone surge to the players, say researchers at the University of Utah. They found that a fans testosterone levels increased by 20 per cent when his team won but fell 20 per cent when they lost. So avoid watching England games and you should be all right.
Source: http://www.mensfitness.co.uk/lifestyle/1558/10-ways-boost-testosterone
Source: http://www.mensfitness.co.uk/lifestyle/1558/10-ways-boost-testosterone
