تأثير الفترات الزمنية لتناول مادة الكافيين على متغيري نبض القلب و الجهد المدرك لدى لاعبي جري المسافات الطويلة أثناء الجهد البدني متوسط الشدة

Abstract EN

This study aimed at identifying the effect of time periods on caffeine intake on the heart rate variables and the perceived effort of the long distance running athletes during the average physical exertion.

The sample included 12 players from long distance running in the sports activity at Mu'tah University.

The results of the study showed that caffeine improves the physical performance of tolerance, especially the medium size after a period of taking it.

The results of the study also showed that the heartbeat (HR) and the cognitive effort (RPE) decrease in level during physical tolerance effort.

The results of the study showed that the effect of caffeine is reflected in the beginning of the physical effort, especially the first (5 minutes).