Is the level of play in the NBA exceeding physical limits of players?

Injuries are part of sports, there is nothing anyone can do about it, and every year we hear of a couple of NBA superstars who fall victim to the injury bug. I don't know if it is just me or have seen way more superstars go down with injury this year more than any other. I have made a list of the latest this season in the NBA:

• Andrew Bynum - knee
• Amare Stoudemire - eye
• Kevin Garnett - knee
• Marcus Camby - ear
• Danny Granger - foot
• Greg Oden - knee
• Tracy McGrady - knee
• Al Jefferson - knee
• Andrew Bogut - back
• Chris Bosh - knee
• Jameer Nelson - shoulder
• Michael Redd - knee
• Tyson Chandler - ankle
• Carlos Boozer - knee
• Gilbert Arenas - knee

Now I can think of three possible explanations for this influx of injuries to the basketball royalty:

1. It is a random phenomenon. Every year there are tons of injuries, maybe this is just one of those years where it has been the superstars who have gotten injured. I guess this is plausible, as every injury is an independent event probability wise
2. The players who I grew up with, who I deem to be superstars are aging. Let's face it, players like Kevin Garnett Tracy McGrady are basically dinosaurs. However, most of the guys on this list are fairly young.
3. In my opinion the most plausible explanation is that the nature of the game has exceeded the physical capabilities of the players. Let's face it, the strength and size of athletes these days are pushing the limits of the human body. Is it possible that this strength and athleticism is finally catching up with the athletes. For example every game you see players just hurling themselves at the rim, and the speed of the game and athleticism make the game dangerous. I am not saying this is the explanation, but I think that it is important to make sure that the athleticism of players may be getting out of hand.