@bensanon
Rob there a few things, yes certainly you can do stuff less than perfectly, and shock horror not get hurt, however When it comes to lifting and exercises in the gym a small error can lead to catastrophic results. As trainers and coaches like doctors we have to work under the premise of "Do no harm" When an exercise is posted up on YouTube with bad form, it does not comply with that do no harm principle.
One of the worst problems is exercises involving the spine. Many internet influencers will demonstrate with little or no weight yet still get it wrong. At best it makes the exercise useless but when the expected weight (which may not be very much weight at all) is added the consequences can be and are horrific. We all need to target the back for good health and rehab of back pain for many but when done wrong, it doesn't just heal quickly. (I had a friend break her back at work in a non exercise related activity at work two weeks ago, the effects are permanent but the forces involved were minimal). It is not just back exercises that are the problem, many ab videos put the spine in a bad position also.
as for other body parts It is not a good sight when you see somebody snap both wrists due to bad form (not somebody I coach), bad form I see time and time again on videos. Even small injuries that may or may not heal quickly can have a big impact on a persons life, especially if it impacts on their ability to work.
I agree, I also don't like the hype articles and I am no specialist when it comes to running so would rarely if ever give even the most general running advice.
Some injuries are simply built up over time doing an activity poorly, however the pain will not be at the point of injury so the person exercising may not associate the pain they are feeling with an exercise they may have been doing badly for years.
Yes, form on some exercises has changed over time as more research is done, you then run into the problem of those who do not trust science or keep up to date continuing to push doing things the way they have always done it regardless of any evidence that it may not be the best or safest way. At Uni there is a big focus on tying to improve communication of the science to coaches who will not read or understand traditional scientific papers. One of my assignments due next week is a report on talent identification using data I have gathered in a series of tests, however it has to be in the form of an infographic so that anybody can understand it. As pointed out in a lecture yesterday on coaching (long term athlete development), coaches when asked what would you like to see more studies on, they ask for stuff that has been studied to death and the coaches either did not understand the results when written up as a scientific paper or simply did not know where to look for the info they wanted.
On a personal level I certainly would never try to push somebody towards high level sport, It is something you need to have a passion for, and all elite athletes understand that high level sport is far from healthy, My body is a walking map of old injuries, While at almost 47 years old I can still do a lot than many others cannot or won't do, the costs health wise has been high . So when I am talking about added weight for exercises etc. It is in the context of the weight someone just looking to be fit would be lifting, not the weight an athlete may be using where injuries happen despite very good form.