Rugby Union's injury crisis

Is rugby getting too dangerous? The question has been raised following a big increase in the number of serious injuries to elite players.

As players get bigger and stronger, high tackles like this become more dangerous

Wales and England in particular have been badly affected in the run up to their international test series in Europe, but their southern hemisphere rivals New Zealand and South Africa are also dealing with the situation.

Players are bigger and stronger than ever - partly because they spend much more time than their predecessors in the gym - but the overall effect on health could be negative.

In some quarters, there are calls for rule changes as this new breed of player – far bigger, stronger and faster than those of previous generations – inflict serious damage on each other.

BBC World Service Sports News correspondent Alex Capstick explores this issue.