The effect of caffeine ingestion on physical performance after prolonged exercise

Bareket Falk, Ruth Burstein, Isaack Ashkenazi, Ofer Spilberg, Jacob Alter, Ester Zylber-Katz, Ardon Rubinstein, Nava Bashan, Yair Shapiro

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

23 اقتباسات (Scopus)

ملخص

The purpose of this study was to determine the effect of caffeine ingestion on physical performance after prolonged endurance exercise. Twenty three trained male volunteers participated in a 40-km march and were divided into two groups, matched for caffeine clearance rate and aerobic capacity. The experimental group ingested, prior to the march, a caffeinated drink at a dose of 5 mg·kg-1 body mass and at the 3rd and 5th h of marching an additional drink at a dose of 2.5 mg·kg-1 body mass. The control group ingested a drink of equal volume at the same times. Upon termination of the march each subject performed a cycle ergometer test at an intensity of 90% maximal oxygen consumption. Time to exhaustion and rate of perceived exertion (RPE) were recorded. Blood samples were drawn predrink, at the 3rd and 5th h of marching and immediately after the cycle ergometer test, and were analysed for caffeine, free fatty acids (FFA), lactate and glucose levels. Plasma FFA levels increased during the march (p<0.05), with no significant difference between groups. Lactate levels increased in the experimental group (p<0.05), with no significant change in the control group. Glucose levels did not change significantly in either group. After the cycle ergometer test, lactate levels were significantly higher in the experimental, as compared to the control group (3.77±0.33 vs 2.52±0.35 mmol·l-1, respectively). There was no significant difference between treatments in the time to exhaustion on the cycle ergometer, but RPE was different (p<0.05). Under the conditions of this study, the results do not indicate caffeine ingestion as an ergogenic aid which will postpone exhaustion following prolonged endurance exercise.

اللغة الأصليةالإنجليزيّة
الصفحات (من إلى)168-173
عدد الصفحات6
دوريةEuropean Journal of Applied Physiology and Occupational Physiology
مستوى الصوت59
رقم الإصدار3
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - أكتوبر 1989
منشور خارجيًانعم

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