c*********e
发帖数: 1389 | 1 good body rotation!
your hip might rotate too much so that your legs are kicking sideways
instead of up and down. since you said you were swimming at high effort
level with a fast stroke rate, you should do small and fast kicks to limit
hip rotation and create an anchor effect from the hip, which enables you to
twist your shoulder against the hip with core muscles to generate great
power for pulling.
however, if you are interested in long distance training, you should adjust
the timing for kicki... 阅读全帖 |
|
c*********e
发帖数: 1389 | 2 additional comments:
1. initial catch and pull shall be deeper
2. initial vertical high elbow doesn't mean bend 90 degree sideways. instead
, upper arm shall point forward and stay horizontal.
these two points will help:
1. maximize length of stroke and shoulder rotation
2. get a better feel of water and catech more water for the pull and push
3. keep stroke path close to the center line so that all the propulsion
generated stays right on the traveling path. otherwise it is like rowing a
boat wi... 阅读全帖 |
|
c*********e
发帖数: 1389 | 3 additional comments:
1. initial catch and pull shall be deeper
2. initial vertical high elbow doesn't mean bend 90 degree sideways. instead
, upper arm shall point forward and stay horizontal.
these two points will help:
1. maximize length of stroke and shoulder rotation
2. get a better feel of water and catech more water for the pull and push
3. keep stroke path close to the center line so that all the propulsion
generated stays right on the traveling path. otherwise it is like rowing a
boat wi... 阅读全帖 |
|
i*********5
发帖数: 19210 | 4 腿和打水
常见打水错误
Top Freestyle Flutter Kick Mistakes
GoSwim - Top Freestyle Flutter Kick Mistakes
TheRaceClub - Secret Tip Legs
Propulsion
Lift
Stabilizing Force
Inertia |
|
i*********5
发帖数: 19210 | 5 建议你多看看Gary Hall Sr.的secret tip legs系列
TheRaceClub - Secret Tip Legs
Propulsion
Lift
Stabilizing Force
Inertia |
|
K******0
发帖数: 254 | 6 看哪儿呢你？！
观察了一下胸毛男，游得非常好呀。你看他的腿，打水的propulsion很好呀，整体的
streamline也很流畅。划手侧面看不清的。游泳靠蛮力几乎是没啥用的。。。 |
|
s***h
发帖数: 662 | 7 最近一直在练习摆腿，主要也没有教练在边上能给指导一下哪里不对。
全是照网上视频摸索。在youtube上看到一个叫做
secret leg tips: propulsion
那人可以17秒打完25米。貌似他也不是什么非常著名的运动员。所以
我觉得还是姿势要对。。。
我自己今天拍的视频在这里：
http://youtu.be/lq59sp66D_Y
有哪位给指点一下？CC？ :-) |
|
c*********e
发帖数: 1389 | 8 you are kicking at a good pace however there is no white water. it means
your body (lower body) position is too low. your legs will be even lower
when you add arm strokes which usually lift upper body due to the lack of
good EVF. I think you should emphasize more on getting good body position
than gaining propulsion. Keep your legs relatively straight. kick downwards
much harder than upwards. make sure your butt break the water and your head
and chest in the water. create white water but keep mo... 阅读全帖 |
|
c*********e
发帖数: 1389 | 9 you have to stop kicking underneath the water surface. to have your hip high
you have to kick high. i only saw a little bit of white water at your butt
around 14 second when your feet kicked closer to the surface.
my advice: kick with your feet completely out of the water but remember to
keep legs relative straight as now. i guarantee your butt will break the
surface. then you gradually lower you feet little by little to achieve a
good balance of streamline and propulsion. |
|
d**y
发帖数: 18174 | 10 手腿的recovery phase发力会适得其反，加力加在propulsive phases。如果她一直练
游泳，需要找到最适合她的swing方式，或者swing to initiate rotation and set
downkick position或者swing to follow shoulders |
|
T**********e
发帖数: 29576 | 11
Phelps身体很多特点，说是6尺8人体的上身，只有5尺10人体的腿长。
Michael Phelps' Freakish Physique Explained
Swim demon Michael Phelps won his 8th gold medal of the 2008 Olympics last
night, his 14th overall. How does he do it? It's that crazy 6'4" bod of his!
"Generally, a man's arm span equals his height but in his case it's 6'7"-
three inches more than his height. Naturally his arms work as powerful
propulsive paddles, giving him a clear edge over others. His lower body,
interestingly, is shorter than that of an averag... 阅读全帖 |
|
T**********e
发帖数: 29576 | 12
看这个规矩，很大程度取决于裁判。
SW 7.5 The feet must be turned outwards during the propulsive part of the
kick. A scissors, flutter or downward butterfly kick is not permitted except
as in SW 7.1. Breaking the surface of the water with the feet is allowed
unless followed by a downward butterfly kick. |
|
c*********e
发帖数: 1389 | 13 are you sure about "蛙泳手蝶泳腿肯定比纯蛙泳快，长距离短距离都快"? dolphin
kick is an add on to gain extra propulsion. 但是， 蛙泳手蝶泳腿比纯蛙泳是完
全不同的. |
|
|
i*********5
发帖数: 19210 | 15 我前天发的那篇英文文章里说：
Most swimmers can double the size of their paddle and increase their
propulsive force by adding their forearms during the pull phase.
To reduce the risk of injury and get the maximum benefit of your big paddle,
think of your arm as a lever. Your effort or muscular contraction should be
initiated near the elbow rather than at the hand. The closer you move the
effort (force) toward your lat, the more fully it will be engaged and reduce
the stress on the rotator cuff. |
|
i*********5
发帖数: 19210 | 16 http://www.feelforthewater.com/2013/10/elite-swimmer-visualisat
Elite Swimmer Visualisation: Don't Start Too Near The Surface
Below is a series of video stills taken from a selection of elite swimmers
right at the very front of their stroke as they commence the catch:
2x Olympic Gold Medallist Rebecca Adlington:
Our original Mr Smooth Jono Van Hazel:
2x Australian 10km Champion Rhys Mainstone:
2x Commonwealth Gold Medallist Ross Davenport:
Elite Junior Triathlete Sky Draper:
Elite Triathlete Guy... 阅读全帖 |
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s**a
发帖数: 1995 | 17 173cm.
That was the only time I recorded 8 strokes on one arm/length (probably 16-
17 strokes to count both arms). 9-10 is common on me.
I don't count my kicking these days. At this stage (TI drill 1-2), I am
focusing on body rotation, balancing (glide on my sides) and legs lifting.
As long as kicking is not hard, I'm happy. Probably my legs don't provide
too much propulsion force now.
以。 |
|
s**a
发帖数: 1995 | 18 关于我说的送肩压肩，今天又看TI的书，里面是说转体驱动时是weight shifting。我
看那个日本人游TI很有weight shifting/propulsion by rotation的感觉。 |
|
A*****s
发帖数: 107 | 19 今天三点open registration,正在外面上课，偷偷打开手机，点进去，告诉我排队第89
个，不能refresh 或hit back ，否则号就作废，15 分钟后排到55 位，系统死了，欲
哭无泪，只能刷新，又被排到60 位， 到30 号的时候，猛地发现报错了班：报到高级
班，再哭.....
40 分钟后终于进入了系统，完成繁兀的第一次用户的注册过程抢到了名额，
送钱上门还这么憋屈。报了个中级班，到四月底开课时候，我的自学初级该能合格
了！现在祈祷老师是个大美女！
不过TI 可能白学了...应该有很多动作类似，
Adult Intermediate
Can float on back independently and float independently on stomach with face
in the water. Can flutter kick with barbell or kickboard as well as enter
deep end of pool. Understand how to tread water. (max 4 students in... 阅读全帖 |
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s**a
发帖数: 1995 | 20 原本准备今天练习Double Switch了，结果昨天看了看书和视频，决定继续练习Under
Switch，再体会一些要点。
书里讲Under Switch的时候说一手前引，身体侧躺打水时，当后手从肚脐前移到鼻子下
面以后要停止打水、身体开始翻滚，在翻滚完成以后才恢复打水。在讲Double Switch
和Triple Switch的时候又重新讲了一下这个话题，其实这个时候所谓停止打水不是完
全停止，而是一条腿要打一下，协助翻滚，然后停止。等翻身完成以后，继续打水，此
时是为了维持向前的动力。从这个话题引入了2-beat kicking，在Double-or-Triple-
Switch里面要求也是每次换手，从一侧躺着变为另外一侧躺着的时候只打一次水。
今天练习Under Switch，加上一些Double Switch除了体会这个打水和翻身的协调，还
有一个fine point：前几次练习翻身时，关注点有时放在前手往后划了。毕竟这是自由
泳的动力来源，可能也是因为我对书里面讲的Rotation能提供propulsion有些怀疑。昨
天看书里在Double-or-Triple-Swit... 阅读全帖 |
|
T********e
发帖数: 8631 | 21 80-90% of the propulsion in long distance freestyle comes from upper body.
In TI style, kick is more for body control than speed. If you want to go
forever, two beat is the way to go. |
|
W*******l
发帖数: 1868 | 22 Saja，
我的教练也指出过我有同样的毛病。注意腿要Quiet. Kicks Should be Small。 Kick
is for balance not for propulsion. 不然你的Kick会耗掉太多能量。腿要直，膝盖
只有一点点弯。
我现在已经改过来了，下面要多练习了。
让LULU给你拍个录像让大家看看。 |
|
d**y
发帖数: 18174 | 23 “Kick is for balance not for propulsion”
这个教练好有创意
Kick |
|
W*******l
发帖数: 1868 | 24 Saja，
我的教练也指出过我有同样的毛病。注意腿要Quiet. Kicks Should be Small。 Kick
is for balance not for propulsion. 不然你的Kick会耗掉太多能量。腿要直，膝盖
只有一点点弯。
我现在已经改过来了，下面要多练习了。
让LULU给你拍个录像让大家看看。 |
|
d**y
发帖数: 18174 | 25 “Kick is for balance not for propulsion”
这个教练好有创意
Kick |
|
d**y
发帖数: 18174 | 26 复习了一下fina的规定：The feet must be turned outwards during the propulsive
part of the kick. A scissors, flutter or downward butterfly kick is not
permitted except as in SW 7.1.
这个规定应该不是最新的。被判dq是不是因为scissors？关于scissors，fina最近有没
有出规则解释？ |
|
r**********n
发帖数: 352 | 27 3/14/2014 (Friday)
==================
300 warm up
Did half of a pyramid swim set (50s, 100s, 150s, 200s) @pace until someone
joined me in the lane. That was 1000 yards. I tried to do at least 2
dolphin kicks off the wall, but my dolphin kicks are too weak right now and
I didn't get much propulsion out of it. I should work on leaving the wall a
little deeper in the water.
Worked on dolphin kicks and flutter kicks (~500 yards)
Worked on rolling my body more, 体会”转髋“，“送髋”的感觉。 (~200 yards)
下次接着练这个。... 阅读全帖 |
|
s**a
发帖数: 1995 | 28 关于两次（侧身）打水，下面这个视频中在18:48开始后的十秒钟有个switch drill中
的两次打腿。别的没有太详细的演示。
http://v.youku.com/v_show/id_XMzA0Njk0MjY0.html
TI的两次打水书中全部说明就在下面了：
下面提到的名词先解释一下
Switch Drill: 上面提到的视频片段
Sweet Spot: Switch Drill中仰面侧躺换气时的姿势
...Your drills are the perfect device for helping you replace an energy-
wasting kick with an economical kick, called a two-beat kick (for two kicks
in each stroke cycle).
... when your body rotation is providing momentum, let your legs take a rest
. You can train them for this by using Switch... 阅读全帖 |
|
s**a
发帖数: 1995 | 29 关于两次（侧身）打水，下面这个视频中在18:48开始后的十秒钟有个switch drill中
的两次打腿。别的没有太详细的演示。
http://v.youku.com/v_show/id_XMzA0Njk0MjY0.html
TI的两次打水书中全部说明就在下面了：
下面提到的名词先解释一下
Switch Drill: 上面提到的视频片段
Sweet Spot: Switch Drill中仰面侧躺换气时的姿势
...Your drills are the perfect device for helping you replace an energy-
wasting kick with an economical kick, called a two-beat kick (for two kicks
in each stroke cycle).
... when your body rotation is providing momentum, let your legs take a rest
. You can train them for this by using Switch... 阅读全帖 |
|
s****e
发帖数: 914 | 30 转一下Terry的增力：
“maximize propulsion by mastering three Creating Skills. These skills are:
1. Use your core-body as your engine.
2. Use your hands to hold onto your place in the water.
3. Swim faster with your body, not with your arms and legs.” |
|
d**y
发帖数: 18174 | 31 我觉得这句话说的好
Much of the propulsion during the butterfly comes from the hips and trunk so
inefficiency of these muscle groups can lead to increased stress on the
shoulders.
过度靠手不行 |
|
m******r
发帖数: 1097 | 32 Swimsmooth网站上的几篇免费文章非常好， 其中
第一篇“the five most common stroke flaws and drills to fix”
第四篇“Develop a better feel of water”
和第五篇“Three flaws ruin your propulsion”（这篇里我找着为啥侧踢水老是游歪
，哈哈）
特别好，里面均提到练习侧踢水改善水中姿态的问题。
初学自由泳和中级游泳者都会有收获。
点击每篇文章的第一个链接“preview article”就可以看到文章全文了。
http://www.swimsmooth.com/free-articles.html |
|
m******r
发帖数: 1097 | 33 Swimsmooth网站上的几篇免费文章非常好， 其中
第一篇“the five most common stroke flaws and drills to fix”
第四篇“Develop a better feel of water”
和第五篇“Three flaws ruin your propulsion”（这篇里我找着为啥侧踢水老是游歪
，哈哈）
特别好，里面均提到练习侧踢水改善水中姿态的问题。
初学自由泳和中级游泳者都会有收获。
点击每篇文章的第一个链接“preview article”就可以看到文章全文了。
http://www.swimsmooth.com/free-articles.html |
|
s****e
发帖数: 914 | 34 我最大的疑惑是，竹内教学生也是这么教的。他自己练的路子和教学生的路子都是，
balance -> streamline -> propulsion -> ...
最费解的是，他让自己的学生上来就从二次腿学起 ...
而不是像有的说法，二次腿最难学，得有六次腿的功底等等 |
|
m***t
发帖数: 220 | 35 city court 对于宽厚脚的还不错，比较耐磨，CUSHION 还不错，但毕竟是中下档，Ｔ
ＲＡＣＴＩＯＮ 不好，综合性能一般。因为LOCAL 网球店鞋的种类不多，象
barricade v,vapor VI,cage,balbolat propulse ,Nike Air CourtBallistec .....这
些高档一些的想都试一试，看那些适合我的厚肥脚。也想问问新泽西中北部有那些网球
店的鞋比较全一些，可选择范围也大些 |
|
h*******s
发帖数: 8454 | 36 人民群众的反应是
nike 2k10
Babolat Propulse
Prince T22
也是nb之外的好选择，建议你去racquet doc试试 |
|
h*******s
发帖数: 8454 | 37 其实你可以去racq doc看看babolat的Propulse 3
忘了在哪儿看到过那个鞋非常的宽 |
|
n*********e
发帖数: 25274 | 38 比起babolat propulse 3，差很多？
有哪个名人穿Babolat的鞋吗？
那个耐克3.3好像是纳豆穿的？我看他法网决赛时，穿得很威风的。。。 |
|
n*********e
发帖数: 25274 | 39 好像是过气的罗迪克在用babolat propulse 3。。。 |
|
e***y
发帖数: 1443 | 40 去年240收了300的GC，看到Babolat出了Propulse 3的星条旗版，老罗签名鞋，而且是
最后一代了，想想就收了吧
结果说Babolat的鞋不能用GC买，尼玛太阴险了 |
|
s*****c
发帖数: 753 | 41 三角帆船顺风不是最稳定的状态
But you can change the design (move the sail to the front of the boat or
lift the center board half way (moving back)) to make it stable. Still,
with 10 knots wind, even with no friction, the max speed of your sailboat on
the run is 10 knots.
In a beamreach, you can assume there is a constant force on the sail with no
friction, so the boat can keep accelerating. (imagine you put sailboat on
a rail (no friction, also serve as center board to stop lateral movement)
that is 90 to t... 阅读全帖 |
|
t******g
发帖数: 2253 | 42 一般有6个月以上warranty的鞋都比较好，看你喜欢什么类型的。
比较轻，speed类型的：
Addidas Adizero Feather II,
Nike Vapor 9 Tour,
Asics Gel Resolution Speed 2,
New Balance MC 996,
support, stability类型的：
Addidas Barricade 8,
Nike Court Ballistec 4.3,
Asics Resolution 5,
Babolat Propulse 4,
Lotto Raptor Ultra IV Speed,
Yonex Power Cushion 308,
我觉得你可以先试试Barricade和Courtballistec系列 |
|
s*****n
发帖数: 1279 | 43 How about Babolat Propulse 4? Looks nice, but don't know whether it's
comfortable? |
|
z***e
发帖数: 1757 | 44 上周买的到手了。挺好，可惜盒子里没有遥控。有时候球会卡在propulsion轮子的后面
，不过把轮子倒推一下，球就出来了。有个问题。是应该等到每次看到明显电池不足了
再充电，还是每次打完都充？不知道哪样对电池更好。 |
|
I**********s
发帖数: 441 | 45 这是不太准确的部分. astrophysicist Neil deGrasse Tyson, astronomer and
skeptic Phil Plait, and veteran NASA astronaut and spacewalker Scott E.
Parazynski have offered comments about some of the most "glaring"
inaccuracies.Examples of such mistakes include:
The "momentum" that caused Clooney to cut his line makes no sense because he
and Bullock are stationary with respect to the space vehicle (nor is there
any propulsive force)
The Hubble Space Telescope (HST), which is being repaired at the
beginning... 阅读全帖 |
|
h******g
发帖数: 11250 | 46 http://en.wikipedia.org/wiki/List_of_photographic_equipment_mak
list of semiconductor sensor marker/designer
* Canon
* Dalsa (formerly part of Philips)
* Fill Factory, now part of Cypress Semiconductor
* Foveon
* Fujifilm, designers of the Super CCD
* Kodak
* Matsushita
* Nikon (designs, but as of 2006 does not yet fabricate)
* Photobit, a spinoff of Jet Propulsion Laboratory (JPL), now owned by
Micron Technology
* Sony
* Samsung Digital Imaging, part ... 阅读全帖 |
|
m**d
发帖数: 21441 | 47 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 人类第一台真空能发动机即将在中国攻关成功
发信站: BBS 未名空间站 (Sat May 14 22:28:25 2011, 美东)
高歌，现任北京航空航天大学能源动力学院动力工程及工程热物理学科一级责任教授，
航空发动机气动热力国防重点实验室副主任，长期从事动力工程、工程热物理及流体力
学领域的教学与科研工作，并在基础科研和多学科的应用技术领域取得了一系列国际领
先水平的创新性科研成果。
他在1984年发明的"沙丘驻涡火焰稳定器"，获国家发明一等奖，钱学森同志称之为"一
项长中国人志气的重要发明"。该成果广泛应用于我国多种军用航空发动机中，取得了
数以亿元计的经济效益，至今仍保有先进水平。本刊记者于今年10月采访了高歌教授，
了解到了他近期从事的一些前沿科研工作的最新进展，尤其是他对龙卷风的研究及其工
程应用价值，让人耳目一新。
高歌教授在采访中提到，传统的航空发动机技术虽然还在不停地改进提高之中，但
受到原理和材料工艺上的限制，已经逐渐逼近了性能发... 阅读全帖 |
|
r*s
发帖数: 2555 | 48 http://www.weather.com/science/environment/news/pollution-asia-
Humans across the globe are connected now more than ever before; actions
taken on one continent can affect people on another. Now, scientists from
NASA’s Jet Propulsion Lab (JPL) and the California Institute of Technology
(CIT) are showing this is true even for weather.
New research out of JPL and CIT reveals that during our cold-weather season,
pollution in China is altering weather patterns in the United States and
other parts of ... 阅读全帖 |
|
b*****2
发帖数: 11103 | 49 【环球科技综合报道】据台湾“中央社”4月9日报道，美国国家航空暨太空总署(NASA)
最新研究指出，全球暖化正改变地球轴心摆动路径。
据报道，冰层的融化，特别是格陵兰冰层融解，改变地球重量分布。刊登在期刊《科学
进展》(Science Advances)的这份研究报告称，这导致北极和地极移动(polar motion)
改变路径。
科学家和航海家1899年就能够准确测量真正北极和极移，并发现几乎整个20世纪，它们
朝加拿大移动。
研究报告主要作者、NASA旗下喷射推进实验室(Jet Propulsion Laboratory)的阿迪卡
里(Surendra Adhikari)表示，不同的是，本世纪情况有所改变，北极和极移逐渐偏向
英格兰。
阿迪卡里说：“20世纪的移动方向在近年出现的改变非常显著。”
科学家说这种变动没有什么害处，但有很大意义。
亚利桑那大学地球科学教授欧佛培克(Jonathan Overpeck)说，这凸显人类对地球的冲
击有多深。(实习编辑：乔恩芳 审核：谭利娅) |
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c******n
发帖数: 16666 | 50 【 以下文字转载自 USANews 讨论区 】
发信人: redmapleleaf (二月花), 信区: USANews
标 题: 六张照片，这个海军士兵该判多久？
发信站: BBS 未名空间站 (Mon Aug 15 12:51:02 2016, 美东)
这个２９岁的海军士兵在核潜艇上拍了六张不该拍的照片。照量刑指南，他应该蹲上６
３到７８个月的监狱。 本周五宣判。
他的律师上星期援引了希拉里电邮门的待遇，认为ｐｒｏｂａｔｉｏｎ即可。
Petty Officer First Class Kristian Saucier, 29, is set to be sentenced
Friday on a single felony charge of retaining national defense information
without permission. In May, Saucier pleaded guilty in federal court in
Bridgeport, Conn., admitting that while working on the U.S.S.... 阅读全帖 |
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