How come Kiwi players are always hurting?

It seems to be a pattern that no cricket follower in New Zealand would like to acknowledge. Despite not playing too much cricket and being gifted with naturally impressive physiques, it seem that the kiwi bunch of cricketers are most prone to injuries. Take the case of Chris Cairns who at one point was regarded as the leading all-rounder in the game but succumbed to multiple injuries. The same thing happened to Dion Nash who probably wasn’t as good as Cairns but was a very useful swing bowler. The same thing happened to Geoff Allot,
the unsung kiwi hero from the 99 world cup and the latest crop of bowlers from the nation located at the deepest end of the southern hemisphere, including Kyle Mills and Daryl Tuffey. Now, it seems that the virus of getting injured without actually doing too much is spread among the New Zealand batsmen. Just take a look at the current state of the test match between NZ and India being played at Nagpur. Jesse Ryder is hobbling all over the 22 yards and Brendon McCullum can hardly bend! What is with all these players—is there some injury-engaging element in their DNAs?