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
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
The use of Transfer Entropy method for the assessment of cardiovascular regulation during head-up tilt test
Cardiovascular interactions during head-up tilt test by transfer entropy between ordinal patterns of heart rate and blood pressure
Generalised heart rate statistics reveal neurally mediated homeostasis transients
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