Effect of L-Carnitine Supplementation on Weight Loss and Body Composition of Taekwondo Players

Yıl 2018, Sayı: Özel Sayı 1, 1 - 8, 20.10.2018

Ahmet Mor Kadir Baynaz Gökhan İpekoğlu Cansel Arslanoğlu Kürşat Acar Erkal Arslanoğlu Halil İbrahim Çakır

Öz

In this study, it was
aimed to investigate the effect of L-carnitine supplements on weight loss and
body composition of taekwondo players. 
Sixteen voluntary male athletes, aged 18-28, were participated in this
study. Athletes were divided into two groups as experiment (supplement) (n=8)
and placebo (n=8). First of all, the body of the athletes was analyzed using
the body composition analyzer. After these analyzes were made, for 7 days, the
experimental group used carnitine and the placebo group used wheat bran. After
7 days of nutrient supplementation, the analyzes performed at the beginning of
the study were repeated. The body fat percentage of the placebo group was found
to be significantly lower than the post-training values (p<0.05) and the
change in fat mass values was not statistically significant (p>0.05). When
the intra-group pre- and post-test body composition values of the L-carnitine
group were compared, the post-test averages of skeletal muscle weight, total
body water and metabolic rate increased statistically significantly compared to
the pre-test averages (p<0.05) and there was a statistically significant
decrease in the body fat mass and percentage (p<0.05). There was no
significant difference in body weight and BMI (p>0.05). L-carnitine and
placebo groups showed no significant difference in body composition according
to Independent Sample T test results (p>0.05). It was seen that pre-training
L-carnitine consumption helped the athletes to maintain optimal body weight and
increased fat oxidation during exercise by activating fat metabolism and
positively affected fat mass reduction.

Anahtar Kelimeler

L-Carnitine, taekwondo, weight loss, body composition

Kaynakça

• Aoki, M. S., Almeida, A. L. R. A., Navarro, F., Costa-Rosa, L. F. B. P., & Bacurau, R. F. P. (2004). Carnitine supplementation fails to maximize fat mass loss induced by endurance training in rats. Annals of nutrition and metabolism, 48(2), 90-94.
• Brass, E. P., & Hiatt, W. R. (1998). The role of carnitine and carnitine supplementation during exercise in man and in individuals with special needs. Journal of the American College of Nutrition, 17(3), 207-215.
• Broad, E. M., Maughan, R. J., & Galloway, S. D. (2011). Effects of exercise intensity and altered substrate availability on cardiovascular and metabolic responses to exercise after oral carnitine supplementation in athletes. International journal of sport nutrition and exercise metabolism, 21(5), 385-397.
• Center, S. A., Harte, J., Watrous, D., Reynolds, A., Watson, T. D. G., Markwell, P. J., ... & Erb, H. N. (2000). The clinical and metabolic effects of rapid weight loss in obese pet cats and the influence of supplemental oral L‐carnitine. Journal of veterinary internal medicine, 14(6), 598-608.
• Close, G. L., Hamilton, D. L., Philp, A., Burke, L. M., & Morton, J. P. (2016). New strategies in sport nutrition to increase exercise performance. Free Radical Biology and Medicine, 98, 144-158.
• Colombani, P., Wenk, C., Kunz, I., Krähenbühl, S., Kuhnt, M., Arnold, M., ... & Langhans, W. (1996). Effects of L-carnitine supplementation on physical performance and energy metabolism of endurance-trained athletes: a double-blind crossover field study. European journal of applied physiology and occupational physiology, 73(5), 434-439.
• Deniz, G. (1999). Karnitin: Sentez, Metabolizma, Fonksiyon Ve İskemik Kalpte Terapötik Önemi. Turkiye Klinikleri Journal of Medical Sciences, 19(1), 55-62.
• Eckerson, J. M. (2015). Weight loss nutritional supplements. In Nutritional Supplements in Sports and Exercise (pp. 159-185). Springer, Cham.
• Greig, C. F. K. M., Finch, K. M., Jones, D. A., Cooper, M., Sargeant, A. J., & Forte, C. A. (1987). The effect of oral supplementation with L-carnitine on maximum and submaximum exercise capacity. European journal of applied physiology and occupational physiology, 56(4), 457-460.
• Jeukendrup, A. E., & Randell, R. (2011). Fat burners: nutrition supplements that increase fat metabolism. Obesity reviews, 12(10), 841-851.
• Karlic, H., & Lohninger, A. (2004). Supplementation of L-carnitine in athletes: does it make sense?. Nutrition, 20(7-8), 709-715.
• Kim, J. H., Pan, J. H., Lee, E. S., & Kim, Y. J. (2015). L-Carnitine enhances exercise endurance capacity by promoting muscle oxidative metabolism in mice. Biochemical and biophysical research communications, 464(2), 568-573.
• Kraemer, W. J., Volek, J. S., & Dunn-Lewis, C. (2008). L-carnitine supplementation: influence upon physiological function. Current sports medicine reports, 7(4), 218-223.
• Owen, K. Q., Nelssen, J. L., Goodband, R. D., Tokach, M. D., & Friesen, K. G. (2001). Effect of dietary L-carnitine on growth performance and body composition in nursery and growing-finishing pigs. Journal of animal science, 79(6), 1509-1515.
• Owen, K. Q., Nelssen, J. L., Goodband, R. D., Weeden, T. L., & Blum, S. A. (1996). Effect of L-carnitine and soybean oil on growth performance and body composition of early-weaned pigs. Journal of Animal Science, 74(7), 1612-1619.
• Pandareesh, M. D., & Anand, T. (2013). Ergogenic effect of dietary L-carnitine and fat supplementation against exercise induced physical fatigue in Wistar rats. Journal of physiology and biochemistry, 69(4), 799-809.
• Pehlivan, A. (2012). Ergojenik Yardım-1: Vitaminler, Mineraller ve Antioksidanlar. TFF Futbol Gelişim Bülten, 4: 80-84.
• Sarıoğlu, Ö., İmamoğlu, O., Atan, T., Türkmen, M., & Akyol, P. (2012). Beden eğitimi bölümünde okuyan farklı branşlardaki öğrencilerin beslenme alışkanlıklarının incelenmesi. Selçuk Üniversitesi Beden Eğitimi Ve Spor Bilim Dergisi, 14(1), 88-94.
• Seim, H., Kiess, W., & Richter, T. (2002). Effects of oral L-carnitine supplementation on in vivo long-chain fatty acid oxidation in healthy adults. Metabolism-Clinical and Experimental, 51(11), 1389-1391.
• Smith, W. A., Fry, A. C., Tschume, L. C., & Bloomer, R. J. (2008). Effect of glycine propionyl-L-carnitine on aerobic and anaerobic exercise performance. International journal of sport nutrition and exercise metabolism, 18(1), 19-36.
• Stephens, F. B., Constantin‐Teodosiu, D., & Greenhaff, P. L. (2007). New insights concerning the role of carnitine in the regulation of fuel metabolism in skeletal muscle. The Journal of physiology, 581(2), 431-444.
• Şen, İ., Öztaşyonar, Y., & Atasever, M. (2003). Besinlerin glisemik indeksi ve sporcuların beslenmesi. Journal of Physical Education and Sport Sciences, 5(2).
• Vecchiet, L., Di Lisa, F., Pieralisi, G., Ripari, P., Menabo, R., Giamberardino, M. A., & Siliprandi, N. (1990). Influence of L-carnitine administration on maximal physical exercise. European journal of applied physiology and occupational physiology, 61(5-6), 486-490.
• Villani, R. G., Gannon, J., Self, M., & Rich, P. A. (2000). L-Carnitine supplementation combined with aerobic training does not promote weight loss in moderately obese women. International journal of sport nutrition and exercise metabolism, 10(2), 199-207.
• Volek, J. S., Kraemer, W. J., Rubin, M. R., Gómez, A. L., Ratamess, N. A., & Gaynor, P. (2002). L-Carnitine L-tartrate supplementation favorably affects markers of recovery from exercise stress. American Journal of Physiology-Endocrinology and Metabolism, 282(2), E474-E482.
• Wall, B. T., Stephens, F. B., Constantin‐Teodosiu, D., Marimuthu, K., Macdonald, I. A., & Greenhaff, P. L. (2011). Chronic oral ingestion of l‐carnitine and carbohydrate increases muscle carnitine content and alters muscle fuel metabolism during exercise in humans. The Journal of physiology, 589(4), 963-973.
• Wutzke, K. D., & Lorenz, H. (2004). The effect of l-carnitine on fat oxidation, protein turnover, and body composition in slightly overweight subjects. Metabolism, 53(8), 1002-1006.