The present study was designed to investigate whether meat-type rabbits are able to perform treadmill running as a daily routine exercise, and if so, whether the exercise induces specific proportional changes in the fatty acid composition of their muscles. After a four-week training period 8-week-old rabbits were slaughtered and the total activity of plasma lactate dehydrogenase was measured, showing a significant difference between the exercised and control groups (429 ± 126 IU/l vs. 639 ± 203 IU/l). Furthermore the fatty acid composition of m. longissimus dorsi (MLD) and m. vastus lateralis (MVL) was determined by means of gas chromatography. Exercise increased the proportions of oleic acid (C18:1 n-9) in both MLD and MVL as compared to the control group. However, the level of stearic (C18:0) and arachidonic (C20:4 n-6) acids significantly decreased in the MVL after the exercise. Changes in the fatty acid profile resulting from the physically loaded condition were of the same tendency in both muscles, adding that the MVL might have been exposed to the exercise more intensively; alterations there occurred in a more pronounced manner. Based on the inference that the composition of membrane structure was also affected, these alterations may have important consequences on meat quality.
Brouns, F. and van der Vusse, G. J. (1998): Utilization of lipids during exercise in human subjects: metabolic and dietary constraints. Br. J. Nutr. 79, 117-128. Review.
'Utilization of lipids during exercise in human subjects: metabolic and dietary constraints. ' () 79 Br. J. Nutr. : 117 -128.
Couture, P. and Hulbert, A. J. (1995): Membrane fatty acid composition of tissues is related to body mass of mammals. J. Membr. Biol. 148, 27-39.
'Membrane fatty acid composition of tissues is related to body mass of mammals. ' () 148 J. Membr. Biol. : 27 -39.
Frimen, C., Eronen, I. and Videman, T. (1998): Effects of treadmill running on plasma glycosaminoglycans in adult rabbits. Int. J. Sports Med. 6, 330-332.
'Effects of treadmill running on plasma glycosaminoglycans in adult rabbits. ' () 6 Int. J. Sports Med. : 330 -332.
Andersson, A., Sjodin, A., Olsson, R. and Vessby, B. (1998): Effects of physical exercise on phospholipid fatty acid composition in skeletal muscle. Am. J. Physiol. 274, 432-438.
'Effects of physical exercise on phospholipid fatty acid composition in skeletal muscle. ' () 274 Am. J. Physiol. : 432 -438.
Andersson, A., Sjodin, A., Hedman, A., Olsson, R. and Vessby, B. (2000): Fatty acid profile of skeletal muscle phospholipids in trained and untrained young men. Am. J. Physiol. Endocrinol. Metab. 279, 744-751.
'Fatty acid profile of skeletal muscle phospholipids in trained and untrained young men. ' () 279 Am. J. Physiol. Endocrinol. Metab. : 744 -751.
Sidossis, L. S., Wolfe, R. R. and Coggan, A. R. (1998): Regulation of fatty acid oxidation in untrained vs. trained men during exercise. Am. J. Physiol. 274, 510-515.
'Regulation of fatty acid oxidation in untrained vs. trained men during exercise ' () 274 Am. J. Physiol. : 510 -515.
Snedecor, G. W. and Cochran, W. G. (1989): Statistical Methods. 8th edition. Iowa State University Press, Ames, Iowa.
Statistical Methods , ().
SPSS® for Windows™ 1999. Version 10., Copyright SPSS Inc.
SPSS® for Windows™ , ().
Turcotte, L. P. (1999): Role of fats in exercise. Types and quality. Review. Clin. Sports Med. 18, 485-498.
'Role of fats in exercise. ' () 18 Types and quality. Review. Clin. Sports Med. : 485 -498.
Gottlieb, M., Essen-Gustavsson, B., Lindholm, A. and Persson, S. G. (1989): Effects of a draft-loaded interval-training program on skeletal muscle in the horse. J. Appl. Physiol. 67, 570-577.
'Effects of a draft-loaded interval-training program on skeletal muscle in the horse. ' () 67 J. Appl. Physiol. : 570 -577.
Hamalainen, N. and Pette, D. (1993): The histochemical profiles of fast fiber types IIB, IID, and IIA in skeletal muscles of mouse, rat, and rabbit. J. Histochem. Cytochem. 41, 733-743.
'The histochemical profiles of fast fiber types IIB, IID, and IIA in skeletal muscles of mouse, rat, and rabbit. ' () 41 J. Histochem. Cytochem. : 733 -743.
Helge, J. W., Ayre, K. J., Hulbert, A. J., Kiens, B. and Storlien, L. H. (1999): Regular exercise modulates muscle membrane phospholipid profile in rats. J. Nutr. 129, 1636-1642.
'Regular exercise modulates muscle membrane phospholipid profile in rats. ' () 129 J. Nutr. : 1636 -1642.
Helge, J. W., Wu, B. J., Willer, M., Daugaard, J. R., Storlien, L. H. and Kiens, B. (2001): Training affects muscle phospholipid fatty acid composition in humans. J. Appl. Physiol. 90, 670-677.
'Training affects muscle phospholipid fatty acid composition in humans. ' () 90 J. Appl. Physiol. : 670 -677.
Husvéth, F., Karsai, F. and Gaál, T. (1982): Peripartal fluctuations of plasma and hepatic lipid components in dairy cows. Acta Vet. Acad. Sci. Hung. 30, 97-112.
'Peripartal fluctuations of plasma and hepatic lipid components in dairy cows. ' () 30 Acta Vet. Acad. Sci. Hung. : 97 -112.
Lutz, H., Ermini, M., Jenny, E. and Joris, E. (1978): The influence of aging on the myosin type of the rabbit soleus and longissimus dorsi muscles. Akt. Gerontol. 8, 667-673.
'The influence of aging on the myosin type of the rabbit soleus and longissimus dorsi muscles. ' () 8 Akt. Gerontol. : 667 -673.
McClelland, G., Zwingelstein, G., Taylor, C. R. and Weber, J. M. (1995): Effect of exercise on the plasma nonesterified fatty acid composition of dogs and goats: species with different aerobic capacities and diets. Lipids 30, 147-153.
'Effect of exercise on the plasma nonesterified fatty acid composition of dogs and goats: species with different aerobic capacities and diets. ' () 30 Lipids : 147 -153.
Meng, H. and Pierce, G. N. (1990): Metabolic and physiological response of the rabbit to continuous and intermittent treadmill exercise. Can. J. Physiol. Pharmacol. 68, 856-862.
'Metabolic and physiological response of the rabbit to continuous and intermittent treadmill exercise. ' () 68 Can. J. Physiol. Pharmacol. : 856 -862.
Romijn, J. A., Coyle, E. F., Sidossis, L. S., Gastaldelli, A., Horowitz, J. F., Endert, E. and Wolfe, R. R. (1993): Regulation of endogenous fat and carbohydrate metabolism in relation to exercise intensity and duration. Am. J. Physiol. 265, 380-391.
'Regulation of endogenous fat and carbohydrate metabolism in relation to exercise intensity and duration. ' () 265 Am. J. Physiol. : 380 -391.
Sidossis, L. S., Gastaldelli, A., Klein, S. and Wolfe, R. R. (1997): Regulation of plasma fatty acid oxidation during low- and high-intensity exercise. Am. J. Physiol. 272, 1065-1070.
'Regulation of plasma fatty acid oxidation during low- and high-intensity exercise. ' () 272 Am. J. Physiol. : 1065 -1070.