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Serum 25-hydroxyvitamin D concentrations and selected diet components in postmenopausal women

100%

Huta-Osiecka A. , Kasprzak Z. , Wochna K. , Nowak A.

nr 4

Ergogenic effects of dietary nitrates in female swimmers

88%

Pospieszna B. , Wochna K. , Jerszynski D. , Goscinna K. , Czapski J.

nr 1

Introduction.A diet enriched with inorganic nitrates by increasing nitrite plasma levels, has been described to benefit exercise performance, blood pressure, endothelial function, and other body functions. It was also proven that additional dietary polyphenols, e.g. red wine or fruits such as strawberries, currants and berries, significantly stimulate the NO₃⁻ – NO₂⁻ – NO metabolic pathway. Aim of Study. A double-blind crossover study was performed to evaluate the influence of 8-day nitrate-rich (5.1 mmol NO₃⁻ ) juice supplementation (C – carrot juice versus B/A – beetroot juice with chokeberry addition) on blood pressure and exercise tolerance in female swimmers. Material and Methods. Eleven female swimmers volunteered for the study (age 20.9 ± 1.3 years). A two-part freestyle swimming exercise test was performed: the anaerobic part consisting of six 50 meter maximal sprints, and the endurance part consisting of an 800 meter continuous swim. Blood Pressure (BP) and Heart Rate (HR) at rest, performance time of all the distances, and peak HR after both test parts were assessed. Results. There were no significant differences in blood pressure and heart rate at rest between two measurement terms. Improvements in 50 meter sprint performance were noted in later repetitions (3-6) of the anaerobic part of the test, and they were more pronounced after B/A juice supplementation. The significant increase in the 800 meter freestyle swim performance was obtained after consuming both juices. However, during C juice supplementation this improvement was accompanied by a significant increment in peak heart rate. Conclusions. 8-day supplementation with beetroot juice with chokeberry addition increases exercise tolerance in both, repeated, maximal and endurance swims. Ergogenic effects of carrot juice with a high nitrate content seem to be possible in young female swimmers, but they still require further research.

Wpływ eksperymentalnego treningu wizualizacji ruchu na zmiany techniki pływania kraulem na grzbiecie u dzieci we wstępnym etapie

63%

Jerszynski D. , Wochna K. , Ciereszko J. , Antosiak-Cyrak K. , Habiera M. , Sobczak K. , Pietrusik K. , Gozdewski R.

Aktywność Ruchowa Ludzi w Różnym Wieku

2016

tom 4[32]

Attending swimming lessons has become a very popular form of spending free time. The aim of the study was to determine the influence of the author’s method of visualizing motion to change swimming technique in crawl and crawl on the back in children. 50 children have been examined and 18 boys out of this group have been qualified for a detailed analysis. The examined have been divided into two groups – an experimental group realising a training program including visualisation – and a control group realising only the training program. As a part of the test method, swimming technique of swimming crawl on the back and on the chest, was registered with digital Sony camera. Then, using “Avi Image”, values of the measured attributes were defined for both swimming techniques. These included the angle of attack and the angle of the maximum bending angle of the elbow of the right and left arm. Results has represented a valuable support of training process, finished with sports success at junior level.

Zmienność siły ciągu pływaków we wstępnym etapie szkolenia pod wpływem rocznego programu treningowego

63%

Szczepankiewicz M. , Jerszynski D. , Wochna K. , Habiera M. , Lutomski P. , Kalinowski P. , Konarski J. M. , Kruzolek P.

Aktywność Ruchowa Ludzi w Różnym Wieku

2018

tom 3[39]