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The Relative Age Effect, Height and Weight Characteristics http://www.mdpi.com/2075-4663/5/4/92/pdf "The results from the 19 year-olds are quite different, since one out of five was born in the first three months and three out of ten were born in the last three months; this was the only age group with no significant differences among the quarters." An Examination of the Relative Age Effect in Developmental Girls' Hockey in Ontario "The relative age effect (RAE) suggests that athletes born earlier in a sport’s selection year are provided with greater opportunities for athletic success. While the effect has been well established in men’s sports, little work has been directed at examining the RAE in women’s sports. The purpose of the present study was to take an exploratory look at the RAE in developmental girls’ hockey in Ontario. Relative age, community location and size, player position, age division, and level of play information were provided by the O.W.H.A. for 36,555 registrants." "The research was done with the hypothesis that females - due to earlier puberty - would not show an age effect (RAE) at the later ages. But that was not supported by the data. This hypothesis was not supported for the novice, atom, peewee, bantam, and midget divisions. These divisions reached both statistical and practical significance, providing support that the RAE is now present in developmental girls’ hockey." Turns out age matters. Even if girls don't get bigger, the way they develop muscle changes over time. Which is why experts notice players don't peak until their mid-20s, sometimes later. Across multiple sports in fact. This isn't just a soccer thing. So yeah, it does matter. |
You are welcome. The older they get the more true it should be. Technical technical technical with increasing speed of thought is what it's all about in pre-teen. Once they hit teens, in an elite environment, it should be about maximum pressure to test for grit. Training centers stop because the DA is supposed to be accumulating the talent from there, with the support of the scouts funneling non DA players to DA environments. There are places if the young woman is dead set on being a pro and are willing to give up scholarship dollars. There is nothing stopping them from going pro just like men, but there are certainly a lot fewer options. And for now, there are only a handful of pro teams outside america that could beat UNC, Stanford, or Penn State playing by college rules. They'd play prettier, more technical soccer, they'd get overrun by american athleticism by college rules. If they played with FIFA 3 sub rules, it would make it much more likely college teams would fall. If DD has sniffs at national team, going pro as early as possible is a great idea. College soccer RUINS technical and creative players while elevating great athletes with adequate skills. To go pro, give up the college scholarship. Just go to a cheaper school online while being a pro in Europe. Going pro in America is harder because the league is also very physical and fast, but it should become more of an option if the league expands in both teams and roster sizes as I've heard it will be. |
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I see play ups get physically over-powered on the field again and again and again.
The muscle and build of an 18 year old is different than a 14 year old. It's visually obvious. Go look at a U19 team and compare them to a U15 team. You don't even have to leave your house. Just look at youtube. Check out the US Soccer play offs. Saying otherwise just sounds ridiculous. |
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Let use common sense
The reason US soccer changed the age grouping to align with the rest of the world was because we were rewarding and developing the late birthdays (August -December) and not the early birthdays (Jan-May) like the rest of world. US SOCCER ADMITTED that this was a HUGE disadvantage to our competiveness because we had a lot of early birthday kids on B teams not being properly developed. So they changed it. Now most of the top teams in the country are full of early birthdays kids (Jan-May). Who got screwed in all of this? The Aug-Dec kids who skipped an entire year of developed and moved up an age. Who was rewarded? The Jan - May kids. Anyone who witnessed this change knows that 6 months is a BIG DEAL. Let alone a 11 or 10 months. So what are they trying to do know? Bio-banding. Which I am against because at the end of the day, you need to be competitive against older kids if you want to play HS or College. |
Politics still controls the scouts, and powerful coaches and clubs still set the agenda and the funnel. But enough of that. College will always be there, and there are academic dollars to be had anyways later on if it comes to that. If you have any information to share of where to go pro outside of the US, please do share. There is hardly any information here that I know of. I know conceptually Europe has a pathway, but I have failed to find out how. Yes, UNC could win based on college soccer rules and brutish American physicality (and yes, I was a brute myself back in the day), but my DD is a technical player. I would hate to see her have to give up on it just because neither of us knew how to go about it. |
RAE is nothing more than selection bias based on SIZE which at younger ages that correlates birth months. But that is just one part of the RAE. The early selection bias has a cumulative affect in regards to self filling prophecy in that those early ID'd kids based on size and speed due to little more than having 8 months more to grow at the age of 9 than their peers. Those kids get put on "better" teams, with the best coaches and the opportunity to play against the best. They are given every developmental advantage that their younger kids did not get. Yes, women will continue to grow until they are 20 but not significantly as a course of natural growth patterns. Training to build muscle or sport specific functional fitness above 17 years old is more a matter of nurture not nature. One could stop playing all together and due to poor nutrition continue to "grow" as well. But we aren't talking about girls in their mid 20's, we are talking about the real difference between a 15 year old girl and a 17 year old girl. And for all intents and purposes the actual significant differences are set. A 90th percentile in height 17 year old is not getting shorter and 15 year old 50th percentile in height is not jumping to 90th percentile in a year either. If that 17 year old is 3 inches taller than a 50th percentile 15 kid by 3 inches in two years that 15 year old will have barely added half an inch. This is much different than the difference between two 50th percentile kids just one year apart at 10-11 years old which can be 3 inches based on nothing more than 11 months and nearly 6 inches worth of growth from 10-12 years old. This is why RAE is so damaging to younger kids. |
Women may not get significantly taller, but their muscle mass changes, even between 15 years old and 17 years old. I can look at a U17 and U15 group mixed together and easily identify who is who without knowing or being told. |
+1. It is a HUGE deal, and anyone who pretends otherwise either has a girl who hasn't reached that age or underestimates the impact of her youth. |
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Pre-puberty, the differences between kids are actually not nearly as significant as during the middle school and high school years when some kids have hit puberty while others haven't.
It isn't the ulittles where age differences are as pronounced. It is definitely during adolescence and the transition from a kid to an adult. |
And bio-banding is useful during the puberty years, NOT beyond 16 year old girls. |
| Sure, by junior year/senior year, body size evens out and bio-banding isn't a factor, nor is it done. |
Nobody said otherwise, but the difference between a 18 year old girl in the 70th percentile and a 16 year old girl in the 70th percentile is not significant. Height growth levels off and the weight difference is around 5lbs. By 17 Girls have hit over 90% of their maturity. There just isn’t much left I. The tank naturally after that. Everything else is training and nutrition. |
Comparing a US Soccer DA U-19 team to a U15 team doesn’t prove that 18 year olds are bigger than 16 year olds, it only proves selection bias that after 18 can be more reliably predicted. It is well known that colleges like to scout 15-16 year old girls because it is the earliest look at a player with the most predictable projections for college age. |
The early developer always benefits. Yes, that gap closes as they get older...but until then... USSF decided who benefited and who didn't (with the age change). |
Agree, but RAE is universal and not limited to the US. All US Soccer did with the age change was align our RAE with the rest of the world. Before the age change our RAE selected “best” for club soccer were 9 months younger than their European counterparts. |