冬泳健身机制探讨(六):冬泳者耐寒秘密
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 1.96"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312">人的体温是相对恒定的,体温过高或过低都会影响酶的活性,从而影响新陈代谢的正常进行,使各种细胞、组织和器官的功能发生紊乱,严重时还会导致死亡。<SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 1.96"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312"><o:p> </o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 1.96"><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312">体温的相对恒定,是机体产热量和散热量保持动态平衡的结果。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 1.96"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312"><o:p> <BR><IMG src="/attachments/Upfiles/20083911316713.jpg"><BR><BR></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; mso-char-indent-count: 1.96"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312"><?xml:namespace prefix = v ns = "urn:schemas-microsoft-com:vml" /><v:shapetype id=_x0000_t75 coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe" filled="f" stroked="f"><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path o:extrusionok="f" gradientshapeok="t" o:connecttype="rect"></v:path><o:lock v:ext="edit" aspectratio="t"></o:lock></v:shapetype><o:p></o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT size=3> <BR><IMG src="/attachments/Upfiles/200839114447656.jpg"><BR><BR><BR></FONT></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN lang=EN-US><o:p><FONT size=3></FONT></o:p></SPAN></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; TEXT-ALIGN: left; mso-char-indent-count: 1.96; mso-layout-grid-align: none" align=left><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: red; FONT-FAMILY: 楷体_GB2312">冬泳者的体温调节功能大大增强。</SPAN></B><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312">水的导热能力是空气的<SPAN lang=EN-US>30</SPAN>倍,冬泳一分钟相当于在陆地上跑半小时耗损的热量,所以冬泳高速耗热如不相应高速产热,正常体温将不能维持。冬泳者的皮肤温度感受器敏感性增强,可迅速将寒冷信号通过神经传入下丘脑体温调节中枢,而后下丘脑发出指令:<SPAN lang=EN-US>1.</SPAN>皮肤血管收缩,立毛肌收缩产生“鸡皮疙瘩”,减少散热;<SPAN lang=EN-US>2.</SPAN>骨骼肌颤抖产热增加;<SPAN lang=EN-US>3.</SPAN>甲状腺激素、皮质醇和儿茶酚胺分泌增加,代谢率增旺,迅速增高血葡萄糖和脂肪酸水平并氧化而产热。这种产热在入水前即可通过条件反射而发生,故入水前不感太冷。刚入水时很冷但迅即由高速产热而抵销,并持续到适度游泳后的出水时,故出水时也不感到冷。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; TEXT-ALIGN: left; mso-char-indent-count: 1.96; mso-layout-grid-align: none" align=left><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312"><o:p> </o:p></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 31.5pt; TEXT-ALIGN: left; mso-char-indent-count: 1.96; mso-layout-grid-align: none" align=left><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312">冬泳者高度耐寒能力还在于皮肤对冷觉的耐受性提高,大脑不怕冷的意识加强,以及应激运动所产生的内腓肽对冷痛觉的抑制。经冬泳锻炼的冬泳人冬季冷水洗脸、洗头以至洗澡都不在话下,轻松完成。<SPAN lang=EN-US><o:p></o:p></SPAN></SPAN></B></P><P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal"><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312"><o:p> </o:p></SPAN></B></P><B style="mso-bidi-font-weight: normal"><SPAN style="FONT-SIZE: 16pt; COLOR: red; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 1.0pt; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA"> 人体调节体温的能力是有限的。</SPAN><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 1.0pt; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">长时间停留在寒冷环境中,机体产生的热量不足以补偿散失的热量,引起体温下降,使生命活动发生障碍。所以要讲究科学冬泳,不能过量,要适可而止,掌握好</SPAN><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: Times New Roman; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 楷体_GB2312; mso-ascii-font-family: 楷体_GB2312">“</SPAN><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 1.0pt; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">度</SPAN><SPAN lang=EN-US style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: Times New Roman; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 楷体_GB2312; mso-ascii-font-family: 楷体_GB2312">”</SPAN><SPAN style="FONT-SIZE: 16pt; COLOR: blue; FONT-FAMILY: 楷体_GB2312; mso-font-kerning: 1.0pt; mso-hansi-font-family: Times New Roman; mso-bidi-font-family: Times New Roman; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">。身体状况和水温、气温决定人在水中的时间,刚下水感觉寒冷刺骨,不太适应,游一会儿就适应了,游到又有冷的感觉前,尽快出水上岸。</SPAN></SPAN></B><BR><BR><br><br>[此帖子已被 畅游 在 2008-3-9 15:38:10 编辑过] 科学冬泳,适可而止。 畅游版主的文章使我们‘为,而知其所以’。 好文章学习了,谢谢阿! 夜里起来撒尿一点也不冷,:lol :lol :lol 冬泳前夜里起来是冻的发抖啊,亲身感受。 好文章,细读并遵照进行科学冬泳. 畅游版主的文章很值得看 “身体状况和水温、气温决定人在水中的时间”前天睡眠不足,同样水温就感到比平时冷一些1 科学冬泳,不能过量,要适可而止,掌握好“度”。 :victory: 好文章一定要顶!感谢楼主。 :victory::lol:handshake 科学冬泳,不能过量,要适可而止,掌握好“度”。科学冬泳,不能过量,要适可而止,掌握好“度”。
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