Off the top of my head, non-head injuries have a few basic sources, ranked 1 - 5.
1. Poor (unprofessional) training practices. We see this very clearly in hamstring and knee injuries. Young players may train for acceleration and top speed but give little attention to deceleration and direction change. These require different training emphases. Or players may tear a pectorzl muscle bcs bad lifting practises have the muscle in bad shape.
2. Poor tackling habits. I would guess thst players are injured more when tackling than when being tackled (legally). Nerve neck and arm injuries are a bad outcome here when you get the head or shoulder in a bad position.
3. Body not yet sturdy enough. (This is not such a big issue as the preceding two points. Modern players are very sturdy.)
4. Falls. Here I am thinking about guys doing a shoulder joint dislocation when diving or shoulder charging or trying to break a fall, for example. Think of how Widdop did his shoulder.
5. Overtraining or poor recovery practises and ignoring niggles (which are realistically part of the job).
1. Poor (unprofessional) training practices. We see this very clearly in hamstring and knee injuries. Young players may train for acceleration and top speed but give little attention to deceleration and direction change. These require different training emphases. Or players may tear a pectorzl muscle bcs bad lifting practises have the muscle in bad shape.
2. Poor tackling habits. I would guess thst players are injured more when tackling than when being tackled (legally). Nerve neck and arm injuries are a bad outcome here when you get the head or shoulder in a bad position.
3. Body not yet sturdy enough. (This is not such a big issue as the preceding two points. Modern players are very sturdy.)
4. Falls. Here I am thinking about guys doing a shoulder joint dislocation when diving or shoulder charging or trying to break a fall, for example. Think of how Widdop did his shoulder.
5. Overtraining or poor recovery practises and ignoring niggles (which are realistically part of the job).