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Roczniok R.,Academy of Physical Education in Katowice | Stanula A.,Academy of Physical Education in Katowice | Gabrys T.,The State School of Higher Education in Ciechanow | Szmatlan-Gabrys U.,University School of Physical Education in Cracow | And 2 more authors.
Journal of Human Kinetics | Year: 2016

The study aimed to determine the values of selected aerobic and anaerobic capacity variables, physical profiles, and to analyze the results of on-ice tests performed by ice-hockey players relegated to a lower league. Performance of 24 ice-hockey players competing in the top league in the 2012/2013 season was analysed to this end. In the 2013/2014 season, 14 of them still played in the top league (the control group), while 10 played in the first league (the experimental group). The study was conducted one week after the end of the playoffs in the seasons under consideration. The results revealed that only in the experimental group the analysed variables changed significantly between the seasons. In the Wingate test, significant changes were only noted in mean relative power (a decrease from 9.91 to 9.14 W/kg; p=0.045) and relative total work (a decrease from 299.17 to 277.22 J/kg; p=0.048). The ramp test indicated significantly lower power output in its final stages (364 compared with 384 W; p=0.034), as well as a significant decrease in relative VO2max (from 52.70 to 48.30 ml/min/kg). Blood lactate concentrations were recorded at the 3rd, 6th, 9th and 12th min of recovery after the ramp test. The rate of post-exercise recovery, ΔLA, recorded after the ramp test turned out to be significantly lower. The times recorded in the on-ice "6x30 m stop" test increased from 32.18 to 33.10 s (p=0.047). The study showed that playing in a lower league where games were less intensive, training sessions shorter and less frequent, had an adverse effect on the performance level of the investigated players. Lower VO2max recorded in the study participants slowed down their rates of post-exercise recovery and led to a significantly worse performance in the 6x30 m stop test, as well as lower relative power and relative total work in the Wingate test. © Editorial Committee of Journal of Human Kinetics 2016.

Tomaszewski M.,Medical University of Lublin | Olchowik G.,Medical University of Lublin | Tomaszewska M.,Medical University of Lublin | Dworzanski W.,Medical University of Lublin | And 2 more authors.
Annals of Agricultural and Environmental Medicine | Year: 2014

Results. By staining the skeleton using the alcian-alizarin method, changes in 52 of Group E fetuses were observed. The frequency of the development variants in the Group E rats was statistically higher, compared with Group C.Introduction and objective.Caffeine is one of the world’s most commonly ingested alkaloids which easily permeates the placenta. The teratogenic and embryotoxic influence of large doses of caffeine has been established in many experimental studies on animals. The objective of this work was to assess the influence of caffeine, administered at 45 °C, on the development of the bone tissue of rats, with particular reference to elemental bone composition using an X-ray microprobe.Materials and methods. The research was conducted on white rats of the Wistar strain. The fertilized females were divided into two groups: an Experimental Group (Group E) and a Control Group (Group C). The females in Group E were given caffeine orally (at 45 °C) in 30 mg/day doses from the 8th to the 21st day of pregnancy. The females in Group C were given water at the same temperature. The fetuses were used to assess the growth and mineralization of the skeleton. A qualitative analysis of the morphology and mineralization of bones was conducted using the alcian-alizarin method. For calcium and potassium analysis, an X-ray microprobe was used.Conclusions. Receiving caffeine at a higher temperature may result in different pharmacodynamics and significantly change tolerance to it. In Group E, a significant decrease in the calcium level, as well as an increase in the potassium level, was observed. The X-ray microprobe can be a perfect complement to the methods which enable determination of the mineralization of osseous tissue. © 2014, Institute of Agricultural Medicine. All rights reserved.

Stanula A.J.,Academy of Physical Education in Katowice | Gabrys T.T.,The State School of Higher Education in Ciechanow | Roczniok R.K.,Academy of Physical Education in Katowice | Szmatlan-Gabrys U.B.,University School of Physical Education in Cracow | And 2 more authors.
Journal of Strength and Conditioning Research | Year: 2016

The purpose of this study was to determine ice-hockey players' playing intensity based on their heart rates (HRs) recorded during a game and on the outcomes of an incremental maximum oxygen uptake test. Sixteen ice-hockey players, members of the Polish national team junior (U20), performed an incremental test to assess their maximal oxygen uptake (Vo 2 max) in the 2 week's period preceding 4 games they played at the World Championships. Players' HRs at the first and second ventilatory thresholds obtained during the test were used to determine intensity zones (low, moderate, and high) that were subsequently used to classify HR values recorded during each of the games. For individual intensity zones, the following HRs expressed as mean values and as percentages of the maximal heart rate (HRmax) were obtained: forwards, 143-151 b·min-1 (HRmax, 75.2-79.5%), 152-176 b·min-1 (HRmax, 80.0-92.4%), 177-190 b·min-1 (HRmax, 92.9-100.0%); defensemen, 127-139 b·min-1 (HRmax, 69.4-75.8%), 140-163 b·min-1 (HRmax, 76.4-89.0%), 164-184 b·min-1 (HRmax, 89.5-100.0%). The amounts of time the forwards and defensemen spent in the 3 intensity zones expressed as percentages of the total time of the game were the following: 58.75% vs. 44.29% (low), 21.95% vs. 25.84% (moderate), and 19.30% vs. 29.87% (high). The forwards spent average more time in the low-intensity zone than did the defensemen, with the difference being statistically significant in periods 1 and 2 (61.44% vs. 44.21% at p ≤ 0.001 and 59.14% vs. 47.23% at p ≤ 0.01, respectively). The results of the study indicate that a method using aerobic and anaerobic metabolism parameters to determine intensity zones can significantly improve the reliability of evaluation of the physiological demands of the game and can be a useful tool for coaches in managing the training process. © 2015 National Strength and Conditioning Association.

The State School of Higher Education in Ciechanow | Entity website

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The State School of Higher Education in Ciechanow | Entity website

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