Authors: Ștefan Adrian Martin1, Roxana Maria Martin-Hadmaș2, Cristian Graur3
Affiliation
1Physiology Department, “George Emil Palade” University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Romania
2Community Nutrition and Food Safety Department, “George Emil Palade” University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Romania
3 Human Movement Sciences Department, “George Emil Palade” University of Medicine, Pharmacy, Science, and Technology of Targu Mures, Romania
Abstract
Background. In the absence of conclusive data regarding fatigue mechanisms, an important question refers to which stages can improve athletic performance through L-Carnitine intake.
Aims. Our aim was to study both blood lactate accumulation and recovery alongside changes in heart rate and heart rate recovery while analysing group performances during physical exercise.
Methods. Following one single squat jump test, 16 participants were included in a double blind study by measuring the squat jump performances next to the lactate ([La-]) production and the heart rate response (HR). Lactate accumulation was analysed over four different ocassions, starting with the baseline value and the ending test value (post SJT). Two other [La-] measurements took place during a 40 minute passive recovery stage according to the study groups: L-Carnitine and Maltodextrine use.
Results. Following the control study group, during a 20 minute passive recovery stage, [La-] droped to 7.54 mmol/l (6.2 to 9.8) and further on to 4.6 mmol/l (2.4 to 6.7) during another 20 minute period, reaching 48.71% at recovery. [La-] values changed significantly during the post SJT period, as seen through p=0.0001, Kruskal-Wallis=31.19. Following the placebo study group data, [La-] values changed significantly during the post SJT period (p=0.0001, Kruskal-Wallis=43.85) as seen through a mean drop of 49.61% following the 40 minute post SJT passive recovery period.
Conclusions. One single L-Carnitine dose did not cause changes in both heart rate and blood lactate recovery following the squat jump test
Key words: squat jump, L-Carnitine, blood lactate
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