Injuries !! What are the causes and how can they be stopped ?

Four key players, all with the same knee injuries, are  they  coincidental injuries? Or do they incur from the system and nuitrition . Fact is Eintracht players have been fighting with injuries since they moved to the first division. Watching Eintracht play, the players work hard  defending against their opponents and rarely lets the ball rolling .As FF says, working against the ball (instead of letting the ball do the donkey work). These leads to overworking the knees,the most applyed joints in soccer. After a period, if an additional protein suppliment like "Sipurilina" is not taken, the knee gristles wear out.These causes servere pains on the knees of the sportsmen.Scientists have proved that  proteins won from the normal diet is not enough to cover the body and same time replace the worn out gristles of a professional sports person playing soccer,tennis,basketball and American football. Majority of tennis players and soccer players from the premiere league use the suppliment. If Eintracht can let the ball rolling the way Hoffenheim or Leverkusen do, then they dont need the suppliment and the number of injuries will reduce.

Here is more info on Spirulina.

I don't know about supplements but one thing is clear - there is clearly something very wrong with the tardiness of recovery of injured players.