Athletics puts one's body in a stressful situation, many athletes learn to ignore the body's signals that they are about to break simply because; if you dont try to break your limits, you will never improve. But, a good coach will often have a conversation with the athlete about safely pushing the limits for improvement.

ultimately, it all boils down to proper warmup(20%), proper training(50%) about the sports, good genes(15%) and luck(15%)

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Some of it is probably just natural variation - slight differences of 1% that are utterly inconsequential to most of us become tremendously important when enduring very high loads, especially repeatedly. My ACL could be 1% weaker than usual and I'd never know, because I don't do anything to puts extreme loads on it the way tackle football does. But if I was a pro athlete getting tackled constantly in practice and games, that tiny difference might be what ends my career.

Another possibility is steroids. Steroids increase your muscle size and force very fast, but tendons and ligaments take much longer to accommodate those forces because they have very few cells (they're mostly just collagen molecules), so can't remodel easily (they also take much longer to heal from injury for the same reason). Consequently, steroid use is a risk factor for many tendon and ligament injuries. But of course, they're never going to say "well, Smith got injured a lot this season because he's juicing", so he's just "injury prone".

Luck of the draw. Player A will have naturally stronger ligaments in their knee than Player B, so Player A is less likely to tear their ACL. There are certain fundamental aspects of the human body that are just what they are regardless of training and nutrition.

I would say its part genetics, part training, part chance.

Some athletes have for example bones that can handle a beating without breaking, some dont. Another part is training and how they have taken care of their body through the years. Some athletes push through the pain of an injury until they break, after this it can be hard to come back. There are also those that keep training when prehaps a rest day or two would benefit them. Huge amount of physical stress on the body will lead The last part is chance. Some are just lucky and some arent. It can for example be a tackle in some sport that if it were a millimeter higher, it could end a career. Nothing athletes really cant control.

College wrestler here. In my experience, athletes often have varying levels of body awareness and coordination, so some are more likely to move in ways that puts more stress on joints, while others are able to move in a more biomechanically optimized way. Some may also be more likely to overtrain, which is also a common cause of injuries when athletes are not recovering fully between workouts.

The athletes that you see competing on tv are not prone to injury. Athletes that are, is washed away before they become athletes at any higher level.

Most pros have had long periods with low amount of injury, its one of the key things that it essential to reach high level.

That is not to say that not most athletes get injurys, it comes with the territory. Not the same as benig "prone" though.

I agree with all of the above, although any major sport has a pretty solid testing regimen at this point and I don't imagine there is too much anabolic steroid use.

I think there is lots of cheating and near-cheating, I'm just saying steroids in particular seem pretty obvious to spot both with testing and with the naked eye.

In my opinion sport is one of the most dangerous things to do physically as most sports people end up with injuries which will come back to haunt them in later life/old age therefore don't do sport just try not to get fat either as both have health implications 🤣

Ps. Plz don't come for me with this it's just a funny curve ball opinion I like to put forward

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Regarding anabolic steroid use, if tests typically indicate whether the person has used PEDs in recent weeks, but not whether they used any months ago, then I wonder what proportion of pro athletes juiced before going pro and only stopped once they had turned pro and were likely to get tested.

There was this guy, who was absolutely dominant in college (thanks in part to anabolics) and then couldn't compete at the pro level once he was off the juice.

https://en.wikipedia.org/wiki/Tony_Mandarich

He was the most egregious example - I mean, the guy just looked like he was on steroids, lol.

https://roidvisor.com/tony-mandarich-stopped-using-steroids-starting-abusing-painkillers/

But it's not like amateur athletes aren't tested. In America, the NCAA tests for steroids and such.

https://www.ncaa.org/sports/2016/7/20/ncaa-drug-testing-program.aspx

I think nearly all steroid-enhanced amateur athletes get filtered out, quite honestly. It's pretty obvious when a guy is juicing, quite honestly, especially to his coach and teammates. They know each others' bodies and they know who is putting in time in the weight room and who is showing gains that are totally unrealistic.

NOBODY wants them on their team. First of all, nobody wants to compete for jobs against those guys. And guys like that on your team are a huge risk. You don't want to build a team around a guy who is one test away from getting a lengthy suspension. Pro teams don't want to invest money in a guy like that. Etc.

There's also the fact that only a few sports even benefit from bulked dudes. You never really hear about steroids in basketball, hockey, or soccer because those aren't sports where you would benefit from looking like the Incredible Hulk and in fact carrying extra bulk would be a detriment. Only certain football positions and certain baseball positions.

I think this is a little naive. Anabolics may have fallen out of favor for athletes but that’s because better stuff was created. PEDs, which is what people colloquially mean by steroids, are caught in the systems of athletes every year. For example in 2022 alone DeAndre Hopkins and Fernando Tatis both served long suspensions for PEDs. Yes, they both used the old fall back of a banned substance was contained in a legal workout supplement but that’s a really thin excuse. They aren’t using them to get huge anymore, they are using them for improved energy, endurance, and the key for football: recovery.

Great answer.

I'd add that differences in flexibility and rehab can be significant.

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