Evolution Of Metabolized Energetic Substrate, At Sport Horses In 3 Days Ridding Trialdoc

=== Evolution of metabolized energetic substrate, at sport horses in 3 days ridding trial ===

Evolution of metabolized energetic substrate, at sport horses in 3 days ridding trial

ȘovĂrel eugenia, poȘan paula, Stoica angela, georgescu gh.

introduction

The balance between the production and use of energy required for effort is essential at sport horse and has a decisive role to obtain performances. Underprovided or undersupplied energy, like the energetic excess throw exogenous reserve, will lead at least, to underperformance, and supra dimension of the effort in this condition can head to severe sickness. This is one of the reasons for the study of the most important energetic precursor’s behavior used in physic effort, in different horse sports. This is the way for objective analysis of success and failed in competition.

Energetic flux in different horse sports (gallop, jumping, cross, marathon) is influence by the biologic availability of substrate (glucose, free fat acids, O2).

The purpose of the study was to observe the variation of the most important energetic precursor (glucose, lipids, fat acids, triglycerides) at horses in real condition of 3 day eventing.

Materials and methods

The biologic material was represented by sport horses from Sportive Club Dinamo-Bucharest. The horses came from Jegalia and Cislau studs, which have a total of 326 horses. There were done biochemical determinations on 15 horses, specialized and well trained for 3 day eventing, males (66,67%) and also females (33,33%), with ages from 5 to over 10 years old and belonging to Romanian Sport Horse and English Thoroughbred breeds (table 1, graphic 1, 2, 3).

Biologic material

Table 1

There was done blood harvesting to analyze the values for glucoses, lipids, fat acids and triglycerides, from studied horses, before and after effort, in 3 day eventing.

Calculating the differences between individual values ante and post exercises, for each constituent and for each horse trial, there was obtained a value which represent the quantity of each energetic substrate metabolized for ATP synthesis. This value can be positive when the repose concentration of the substance is lower by the port-exercise concentration. When the sanguine concentration ante-exercise is higher than the concentration after effort the value resulting from difference is negative, which mean that the consumption is over the availability of that substance. In our study there were no negative values.

Research results

Quantities of energetic substrate, metabolized during the 3 horse trial of 3 day eventing

Table 2

Graphic 2. Glucoses as energetic substrate metabolized in 3 day eventing

Graphic 3. Total lipids as energetic substrate metabolized in 3 day eventing

Graphic 3. Fat acids as energetic substrate metabolized in 3 day eventing

Graphic 3. Triglycerides as energetic substrate metabolized in 3 day eventing

There was calculated the significant differences for each energetic substrate values (glucoses, total lipids, fat acids and triglycerides), between 3 trials of 3 day eventing (steeple chase, cross-country and jumping) (table 3, 4, 5, 6)

Differences signification for glucoses as energetic substrate, between the 3 trials in 3 day eventing

Table 3

Differences signification for total lipids as energetic substrate, between the 3 trials in 3 day eventing

Table 4

Differences signification for fat acids as energetic substrate, between the 3 trials in 3 day eventing

Table5

Differences signification for triglycerides as energetic substrate, between the 3 trials in 3 day eventing

Table 6

** p<0,01 – distinct significant, with 99 % probability

*** p<0,001 – very significant, with 99,9 % probability

conclusions

All studied parameters (glucoses, total lipids, fat acids and triglycerides) registered a higher value after effort, than before effort, at all 3 trials in 3 day eventing.

The highest values for metabolized energetic substrate were obtained at differently, depending on the chemical precursor. Thus, the highest value for glucoses was at jumping trial, lipids and fat acids were used more at steeple chase trial and the highest quantity of triglycerides was utilized at cross country trial.

For glucoses, total lipids and triglycerides there were insignificant differences for the metabolized value obtained at the 3 compared trials.

The values of free fat acids are increasing statistically very significant (p<0,001), from 0,93 ± 0,12 mmol/l, before effort to 10,41 ± 1,75 mmol/l after effort.

At the end of steeple chase trial, the value of fat acids (6,65 ± 0,61) is higher mmol/l than the value registered at the end of jumping trial (3,77 ± 0,24 mmol/l) but is less than the value obtained at cross country (20,82 ± 4,4 mmol/l). Thus, the metabolized values are various: 5,76 ± 0,63 mmol/l at steeple chase trial , the record (19,83 ± 4,45 mmol/l) was obtained at cross country trial, and at jumping trial the value of metabolized acids was 2,84 ± 0,19 mmol/l. Between steeple and cross trials the statistically difference was very significant, and between steeple and jumping trials the statistically difference was distinct significant.

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