While writing my last blog post on landing mechanics and ACL injuries, I came across a study by Parsons & Alexander that was recently published. The study attempts to discover if the use of one video coaching session can help to make positive changes in the landing mechanics of volleyball players. I encourage you to read more about this study on modifying landing mechanics.
Here is a quick summary of the volleyball study:
The researchers took video clips of volleyball players completing a spike jump/landing. They used Dartfish software to give the girls immediate feedback and also to analyze the results in further detail. They measured numerous angles related to landing position at ankle, knee, hip, and torso. The researchers found numerous improvements resulted short term from their video & verbal feedback. While there were some decreases in the results during the 4 weeks prior to retesting, several of the variables maintained a significantly positive improvement. Basically, the one feedback session did help the volleyball players to make and maintain positive improvements.
So, what are the take home points?
Video can play a huge role in helping your athletes to make improvements. Remember that some people are visual learners. Using video can help them to truly understand what you are saying to them in your verbal coaching.
The athletes were able to maintain some of their improvements over 4 weeks. What if there was to be more of an emphasis on the changes in landing mechanics? What if they took 15 minutes a week to focus on them? What if they received visual feedback multiple times with constant verbal coaching everyday? I’m sure that the results would be more significant. As they say, “practice makes perfect”. What would this do the the number of torn ACL’s in volleyball? I’m sure it would decrease it dramatically.
I spent this past weekend at a volleyball tournament. Most of the players were 12 – 14 years old. With so much volleyball to watch, I tried to use it as a chance to gain a better perspective of the sport. I was trying to look at it from both an ATC viewpoint and a strength and conditioning one. I made several observations, some of which I’ll post later this week.
Today I thought that I would discuss the one that stood out the most. One team had a player that I feel is a recipe for a future ACL injury. First off, I hope that I’m 100% wrong. Now for the facts. The girl was already wearing a knee sleeve on one knee, and probably not by coincidence, she had a bad habit of landing only on that same leg after a jump. She was also somewhat overweight. Now, please don’t read too much into the fact that I said that she’s overweight. I don’t believe that fact itself guarantees a torn ACL. I do however believe that it could contribute if other factors are present. My major concerns revolved around her landing mechanics. While I don’t know the girl or her medical history, I would guess that poor mechanics have led to previous knee problems. My question is this: has anyone else realized this? Have her coaches noticed during the endless hours of practice and games? What about her doctor, assuming she saw one about her knee? The next question is when will they work on her landing mechanics? We all know that poor landing mechanics lead to bad things, especially for female athletes. Unfortunately, the first time this gets addressed may be in rehab after an ACL repair. The sad thing is that a good jumping / landing program might be able to lessen the chance of a serious knee injury ever occurring to this girl.