9 research outputs found

    Zmiany parametr贸w skoku koni podczas drugiej cz臋艣ci treningu w 100-dniowej pr贸bie dzielno艣ci

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    The subject of the present study was the horse鈥檚 biomechanical response to training during the stationary 100-days performance test for Trakhener stallions. Ten stallions were filmed during the 100-days performance test, in the 62nd and 92nd day of training. Linear jumping stride parameters were measured for take-off and landing distances for each limb separately, as well as the differences between limb placement in pairs at take-off and landing were calculated. Data from the video image analysis were collected using a 25 fr/sec camera and measured by the manual Micro Station program. The parameters were filmed on a spread (oxer) obstacle of the height and width of 1.05 m, jumped three times by each horse. A total number of 60 jumps was analysed. The analysis of variance was performed using Mixed procedure of the SAS program with the random effect of the horse and fixed effects of the trial and successive number of the jump. The effect of training was significant for all take-off parameters and two parameters of front limb at landing. The effect of the successive jump was statistically significant for the landing distance of the hind non-leading limb as well as for distance between hind limbs at landing. The effect of the horse was significant for all the measured parameters. The effect of jumping training for the young horse at an early stage seems to be more important for the take-off than for the landing technique. It is also more significant for front limbs than for hind limbs.Tematem prezentowanych bada艅 jest odpowied藕 biomechaniczna koni podczas stacjonarnej 100-dniowej pr贸by dzielno艣ci dla ogier贸w trake艅skich. Dziesi臋膰 ogier贸w filmowano podczas 100-dniowej pr贸by dzielno艣ci w 62. i 93. dniu testu. Liniowe parametry kroku by艂y mierzone dla dystans贸w odbicia i l膮dowania dla ka偶dej ko艅czyny oddzielnie, obliczono te偶 r贸偶nice pomi臋dzy ustawieniem ko艅czyn w parach przy odbiciu i l膮dowaniu. Dane do analizy zdj臋膰 zosta艂y zebrane przy u偶yciu kamery filmuj膮cej 25 stop-klatek na sekund臋 i zmierzone za pomoc膮 programu Micro Stadion. Parametry skok贸w by艂y filmowane na przeszkodzie szerokiej (okser), o wysoko艣ci i szeroko艣ci wynosz膮cej 1,05 m, pokonywanej przez konie trzykrotnie. Og贸艂em przeanalizowano 60 skok贸w. Przeprowadzono analiz臋 wariancji za pomoc膮 programu SAS procedury Mixed, przy uwzgl臋dnieniu losowego wp艂ywu konia oraz sta艂ych efekt贸w pr贸by i kolejnego skoku. Wp艂yw treningu by艂 istotny dla wszystkich parametr贸w odbicia i dw贸ch parametr贸w l膮dowania ko艅czyn przednich. Wp艂yw kolejnego skoku by艂 statystycznie istotny dla dystansu l膮dowania ko艅czyny tylnej nie prowadz膮cej (TNP), jak i dystansu pomi臋dzy ko艅czynami tylnymi przy l膮dowaniu (TP-TNP). Wp艂yw konia by艂 istotny dla wszystkich mierzonych parametr贸w. Wp艂yw treningu skokowego m艂odych koni na wst臋pnym etapie wydaje si臋 by膰 wa偶niejszy dla techniki odbicia ni偶 l膮dowania. Jest tak偶e bardziej istotny dla ko艅czyn przednich ni偶 tylnych

    Generalised heart rate statistics reveal neurally mediated homeostasis transients

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    Distributions of accelerations and decelerations, obtained from increments of heart rate recorded during a head-up tilt table (HUTT) test provide short-term characterization of the complex cardiovascular response to a rapid controlled dysregulation of homeostasis. A generalised statistic is proposed for evaluating the neural reflexes responsible for restoring the homeostatic dynamics. An evaluation of the effects on heart rate of the neural regulation involved in achieving homeostasis indicates a distinction between vasovagal patients and healthy subjects who are not susceptible to spontaneous fainting. A healthy cardiovascular response to the HUTT test is identified in the sympathetic tone appropriately punctuated by vagal activity
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