[转贴]划臂的力源--旱鸭子
<STRONG><FONT size=2><FONT face=Arial><SPAN class=smalltxt><SPAN class=bold>划臂的力源</SPAN></SPAN><BR><BR></FONT></FONT></STRONG><SPAN style="FONT-SIZE: 14px">表面看手臂连接于肩胛, 双腿连接于髋部, 似乎理所当然地划臂及打腿的主要力量来源于肩和髋,? 但这就像杠杆或吊车, 力源是不可以固定在支点处的. 划水全程以拉为辅, 以推为主, 尤其最用力的[推水]时段, 主要由[背阔肌]的收缩来完成. [背阔肌]起于腰背中间, 止于肱骨上端, 并跨越肩胛, 是全身最大的阔肌, 也是较完美的[吊车结构]---- 肩胛为支点, 肱骨为吊臂, 背阔肌为力源:<BR><BR><BR><IMG src="http://www.51swim.com/mybbs/images/attachicons/image.gif" align=absMiddle border=0> <A title=查看积分策略说明 href="http://www.51swim.com/mybbs/member.php?action=credits&view=getattach" target=_blank><FONT color=#003366>图片附件</FONT></A>: <A class=bold href="http://www.51swim.com/mybbs/attachment.php?aid=6093" target=_blank><STRONG><FONT color=#003366>shtrap.JPG</FONT></STRONG></A> (2006-7-22 09:30 PM, 23.39 K)<BR><BR><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.resized) this.style.cursor=hand;" onclick="if(!this.resized) {return false;} else {window.open(attachments/month_0607/shtrap_DzkadqlNSGNb.jpg);}" src="http://www.51swim.com/mybbs/attachments/month_0607/shtrap_DzkadqlNSGNb.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=点击在新窗口查看全图\nCTRL+鼠标滚轮放大或缩小;}" border=0><BR><BR><BR><INPUT onclick=document.MediaPlayer.DisplaySize=3 type=button value=全屏播放 name=mplayer> [ 双击退出全屏播放状态 ] <BR><BR><OBJECT class=OBJECT id=MediaPlayer height=300 width=360 align=middle classid=CLSID:22d6f312-b0f6-11d0-94ab-0080c74c7e95><embed type="application/x-oleobject" <br>codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" <br>width="360" height="300"></embed></OBJECT><BR><BR>游泳时人是处于准失重状态下的, 任何动作都要保持整体的平衡, 陆上孤立的挥臂或抬腿动作, 在水中是不大容易实现的, 必须有一对称的力与其配重; 仰-自划臂由异侧的打腿来配重, 即[压对角线], 蝶-蛙打腿由前面的胸部来配重, 即[胸腋下压]. 由肌纤维的走向不难看出, 连接配重双方的肌群带都汇聚于一点, 这一点就是[动力之源]: 腰. 参见[打腿的力源]:<BR><BR><A href="http://www.51swim.com/mybbs/thread-6355-2-1.html" target=_blank><FONT color=#003366>http://www.51swim.com/mybbs/thread-6355-2-1.html</FONT></A><BR><BR><BR><BR><FONT color=#003366><IMG src="http://www.51swim.com/mybbs/images/attachicons/image.gif" align=absMiddle border=0></FONT> <A title=查看积分策略说明 href="http://www.51swim.com/mybbs/member.php?action=credits&view=getattach" target=_blank><FONT color=#003366>图片附件</FONT></A>: <A class=bold href="http://www.51swim.com/mybbs/attachment.php?aid=6091" target=_blank><STRONG><FONT color=#003366>20049251.JPG</FONT></STRONG></A> (2006-7-22 02:25 PM, 50.13 K)<BR><BR><IMG onmousewheel="return imgzoom(this);" onmouseover="if(this.resized) this.style.cursor=hand;" onclick="if(!this.resized) {return false;} else {window.open(attachments/month_0607/20049251_ExdFb1ZqcPW4.jpg);}" src="http://www.51swim.com/mybbs/attachments/month_0607/20049251_ExdFb1ZqcPW4.jpg" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=点击在新窗口查看全图\nCTRL+鼠标滚轮放大或缩小;}" border=0><BR><BR></SPAN> <FONT size=4>学习<SPAN class=smalltxt><SPAN class=bold><FONT face=Arial>划臂的力源，视频还是没有打开。</FONT></SPAN></SPAN></FONT> <P><FONT size=4>继续学习！</FONT></P> 原文由 做的比说的好 发表: <br><P><FONT size=4>继续学习！</FONT></P> <STRONG><FONT color=#6809f7 size=7> 咋打不开视屏？</FONT></STRONG>
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