Razi Journal of Medical Sciences
مجله علوم پزشکی رازی
RJMS
Medical Sciences
http://rjms.iums.ac.ir
39
journal39
2228-7043
2228-7051
en
jalali
1394
4
1
gregorian
2015
7
1
22
133
online
1
fulltext
fa
تاثیر مصرف مکمل کافئین، کارنیتین و کافئین- کارنیتین بر سطح اسید لاکتیک و رکورد شنای 400 متر کرال سینه شناگران دختر نوجوان
Effects of Caffeine, L-Carnitine and Their Combination on 400m Freestyle Performance in Adolescent Female Swimmers
غدد داخلی و متابولیسم
Endocrinology & Metabolism
پژوهشي
Research
<p class="MsoNormal" dir="rtl" style="margin-bottom: 0.0001pt line-height: normal direction: rtl unicode-bidi: embed"><b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">زمینه و هدف</span></b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">: سالها است</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">که</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ورزشکاران</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">برای</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بهبود</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">عملکرد</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ورزشی از ترکیبات گوناگونی استفاده میکنند. هدف</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مطالعه حاضر</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بررسی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">اثرات</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مصرف</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">کافئین، کارنیتین، و کارنیتین- کافئین بر سطح اسید لاکتیک و رکورد شنای 400 متر کرال سینه شناگران دختر نوجوان</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بود.<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" dir="rtl" style="margin-bottom: 0.0001pt line-height: normal direction: rtl unicode-bidi: embed"><b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">روش</span></b><span dir="ltr"></span><span dir="ltr"></span><b><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span></b><b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">کار</span></b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">:</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">در</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مطالعه</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">دوسوکور 16 شناگر شهرستان کرج با</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">میانگین سنی 14/1 </span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">±</span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">9/13 نمایه</span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">توده</span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بدن 34/4 </span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">±</span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">7/21 قد 75/58 </span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">±</span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">9/160 وزن31/1</span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">±</span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">3/56 مورد</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بررسی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">قرار</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">گرفتند. فعالیت</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ورزشی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">شامل طی مسافت 400 مترشنای کرال سینه با حداکثر سرعت بود. این</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">فعالیت،</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">نیم</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ساعت</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">پس</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">از</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مصرف</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">کافئین (3</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">میلی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">گرم</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">به</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ازای هر</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">کیلوگرم</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">وزن</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">بدن)،</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"><span dir="rtl"></span><span dir="rtl"></span>5/1</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">گرم</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">ال</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span>– </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">کارنیتین، ترکیبی از کافئین </span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">–</span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"> ال کارنتین</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"><span dir="rtl"></span><span dir="rtl"></span> و دارونما در4 جلسه</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مجزا</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">و</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">مشابه</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">برای</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">هر</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">آزمودنی</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">انجام</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">شد</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span>.</span><span dir="rtl"></span><span dir="rtl"></span><span style="font-size: 10pt font-family: 'B Mitra'"><span dir="rtl"></span><span dir="rtl"></span> <span lang="AR-SA">اسید لاکتیک خون</span></span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">در1 و 10 دقیقه پس از پایان فعالیت اندازه</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">گیری</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">شد.<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" dir="rtl" style="margin-bottom: 0.0001pt line-height: normal direction: rtl unicode-bidi: embed"><b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"> یافتهها</span></b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">: نتایج تحلیل واریانس با اندازه</span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">گیری مکرر نشان داد که مصرف مکمل (کافئین، ال-کارنتین، کافئین و ال کارنتین و دارونما) بر عملکرد شنای 400 متر کرال سینه اثر نداشت (05/0</span><span lang="AR-SA" style="font-size: 10pt font-family: 'Times New Roman', serif">≤</span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif">p</span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"><span dir="rtl"></span><span dir="rtl"></span>). همچنین؛ نتاج نشان داد که بین میزان تجمع اسید لاکتیک در دقیقه اول بازگشت به حالت اولیه در سطوح مختلف مصرف مکمل شامل کافئین و کافئین - ال کارنتین با دارونما تفاوت معناداری مشاهده شد ( 001/ 0 ></span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif">p</span><span dir="rtl"></span><span dir="rtl"></span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'"><span dir="rtl"></span><span dir="rtl"></span>).<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" dir="rtl" style="margin: 0cm 1.3pt 0.0001pt 0cm line-height: normal direction: rtl unicode-bidi: embed"><b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">نتیجهگیری</span></b><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">: مصرف کارنیتین، کافئین</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">و کارنیتین-کافئین قبل از ورزش در عملکرد</span><span dir="ltr"></span><span dir="ltr"></span><span dir="ltr" lang="AR-SA" style="font-size: 9pt font-family: 'Times New Roman', serif"><span dir="ltr"></span><span dir="ltr"></span> </span><span lang="AR-SA" style="font-size: 10pt font-family: 'B Mitra'">شنای 400متر کرال سینه شناگران اثر ندارد. از طرف دیگر مصرف کافئین به تنهایی و همراه با ال کارنتین سبب تجمع بیشتراسیدلاکتیک در دقیقه اول بازگشت به حالت اولیه میشود.</span><span dir="ltr" style="font-size: 9pt font-family: 'Times New Roman', serif"><!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt line-height: normal"><b><span style="font-size: 12pt font-family: 'Times New Roman', serif">Background</span></b><span style="font-size: 12pt font-family: 'Times New Roman', serif">: The study aim was to examine the effect of caffeine, L-carnitine, and their combination on lactate blood level, and exercise time during a 400m freestyle swimming trial.<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt line-height: normal"><b><span style="font-size: 12pt font-family: 'Times New Roman', serif">Methods</span></b><span style="font-size: 12pt font-family: 'Times New Roman', serif">: In a double-blind randomly designed study, 16 Karaj female freestyle swimmers aged 13.87±1.14 yr, BMI 21.69±4.34 kg/m2, height 160.87±58.75cm, weight 56.31±1.31kg were recruited. The trial activities included completing maximal 400m freestyle. The activity was performed half an hour after taking caffeine (3 mg/kg body weight) or L-carnitine (1.5g), caffeine + L-carnitine (3 mg/kg + 1.5 g), or placebo on 4 similar separate occasions. Blood lactate was measured 1 and 10 min after exercise.<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt line-height: normal"><b><span style="font-size: 12pt font-family: 'Times New Roman', serif">Results</span></b><span style="font-size: 12pt font-family: 'Times New Roman', serif">: Repeated measures ANOVA indicated that no significant difference was observed for performance in all groups (p≥0.05), whereas significant differences were observed in lactate accumulation in 1 min after trial (p<0.05).<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt line-height: normal"><b><span style="font-size: 12pt font-family: 'Times New Roman', serif">Conclusion</span></b><span style="font-size: 12pt font-family: 'Times New Roman', serif">: These findings showed that consuming caffeine, L-carnitine and their combination has no meaningful effect on performance. However, it seems that taking caffeine alone or with L-carnitine result would result in more lactate accumulation in 1 min after exercise.<!--stripped--><!--stripped--></span></p>
<p class="MsoNormal" style="margin-bottom: 0.0001pt line-height: normal"><b><span style="font-size: 12pt font-family: 'Times New Roman', serif"> </span></b></p>
کافئین, ال- کارنیتین, اسید لاکتیک, رکورد شنا, شناگران دختر نوجوان
Caffeine, L-carnitine, Lactic acid, Swimming record, Adolescent female swimmers
16
26
http://rjms.iums.ac.ir/browse.php?a_code=A-10-1-1677&slc_lang=fa&sid=1
میترا
عزیزی ماسوله
mitra3291@yahoo.com
3900319475328460039188
3900319475328460039188
Yes
کبری
شریفی
3900319475328460039189
3900319475328460039189
No
دانشگاه علوم پزشکی شهید بهشتی
پژمان
احمدی
3900319475328460039190
3900319475328460039190
No
مهدی
هدایتی
3900319475328460039191
3900319475328460039191
No