Serum Lipid Modification Related to Exercise and Polyunsaturated Fatty Acid Supplementation in Jumpers and Thoroughbred Horses

The importance of polyunsaturated fatty acids (PUFAs) within the different biological functions of animals has been widely recognized. In this study, exercise and PUFAs supplementation effects on serum triglycerides, total cholesterol, and nonesterified fatty acids (NEFAs) concentration were evaluated in athletic horses. Two sport horse types (10 Italian saddle jumpers and 10 Thoroughbreds) were equally divided into two groups. Jumpers and Thoroughbred experimental groups (A(J) and A(T)) received 4-week PUFAs supplementation and control groups (B-J and B-T) received no dietary supplement. Before starting the PUFAs supplementation (T0) and at the end of the experimental period (T4), horses were subjected to simulated events. From each subject, blood samples were collected every 7 days at rest, before and after the first test (T0(R) and T0(PE)), and before and after the second test (T4(R) and T4(PE)). Higher triglycerides and NEFA concentrations at T0(PE) and T4(PE) than T0(R) and T4R in both groups were found as a result of exercise (P <. 005), but lower triglycerides and NEFA concentrations at T4(PE) in group A(J) than group B-J (P < .05) and in group A(T) (P < .005) than group B-T were found as a result of PUFAs supplementation. Effects of PUFAs supplementation was highlighted by the statistically significant lower triglycerides and NEFA concentrations found at T4(PE) than T0(PE) in groups A(J) (P < .05) and A(T) (triglycerides: P < .05; NEFAs: P < .0001). (C) 2014 Elsevier Inc. All rights reserved.