Author/Editor		Ušaj, A; Lojen, S; Kandare, F
Title		How nutritional (drinking) intervention influence endurance performance and metabolism
Type		članek
Source		In: Končni program, povzetki prispevkov in članki Mednarodna konferenca Krepimo zdravje z gibanjem in zdravo prehrano; 2002 Apr 18-21; Radenci. Ljubljana: CINDI,
Publication year		2002
Volume		str. 53, 153-6
Language		eng
Abstract		Endurance performance has related to health frequently. A higher endurance level may be related to better health, because of more economical cardiovascular and respiratory function and different metabolism: increase in endurance relates to increased fat metabolism and reduced carbohydrate (CHO) metabolism at the similar absolute intensity. In spite of those adaptations, long runs must be accompanied also by additional CHO supplementation, usually as sport drinks, to prevent fatigue. In addition to water and electrolytes, sport drinks are consumed for maintain glucose homeostasis during exercise. How CHO beverages influence on CHO and FAT metabolism and subjects performance was the question we have like to answer. Eight subjects: 4 higher endurance performance (lactate threshold (LT)) = 187?1 1 W, and 4 with lower endurance performance LT= 145t19 W, repeated 2 h cycling at the same relative intensity of LT two times, separated by one week. During the first test, they drank water and during the second, 15 % CHO solution, both in equal amount every 20 min. Results showed that endurance performance at the same relative intensity (LT) increased at less endurance subjects when drinking CHO solution. More endurance subjects did not show any significant improvement by drinking CHO solution during the 2 h test. CHO drinking increased total CHO oxidation in more endurance group from 2.74t0.02 to 2.91 t0.25 g/min (NS) and in less endurance group from 1.26t0.02 to 2.28t0.45 g/min (P= 0.05). Fat oxidation showed clear tendency to be reduced in both groups. The specific exogenous CHO oxidation increased (P<0.05) similarly throughout the test to reach 0.83t0.06 and 0.88?0.03 g/min for each of both groups. It may be concluded that 15% CHO beverage influenced endurance performance more in less endurance subjects. (Abstract truncated at 2000 characters).
Descriptors		PHYSICAL ENDURANCE LACTATES EXERCISE TEST BEVERAGES CARBOHYDRATES