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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ekscentrinio koncentrinio prieškrūvio poveikis nesportuojančių asmenų vegetacinių sistemų rodikliams didelio intensyvumo darbe / The effect of eccentric concentric pre-load on the vegetative indices in unsportsman person during high intensity exercise

Razmislevičius, Darius 16 May 2006 (has links)
The hypothesis. We supposed the fatigue and its residual phenomena generated by eccentric concentric load to have a different effect on the changes in vegetative indices during exercise of high aerobic intensity in particular. The aim of the research was to establish the effect of eccentric concentric pre-load on the changes in vegetative indices during exercise of high intensity. The tasks set were as follows: 1. To estimate the residual effect of eccentric pre-load on the changes in vegetative indices during exercise of high intensity. 2. To estimate the residual effect of eccentric-concentric pre-load on the changes in vegetative indices during exercise of high intensity. 3. To compare the residual effect of eccentric and eccentric-concentric pre-load on the vegetative indices, biochemical indices of blood during exercise of high intensity. The subjects were 9 unsportsman persons, who gave their informed consent to take part in the experiments within the present study. They were distributed to two eksperimental groups. The first group carried out eccentric pre-load and the second group carried out eccentric-concentric pre-load. The methods used were as follows: changes in the values of VO2, VCO2, heart rate (HR) and Ve indices of the subjects were established applying the test of continuously increased load and the test of constant load when pedalling the veloergometer. After testing blood of the subjects to establish lactate and Creatin-Kinase (CK) concentration in... [to full text]
2

12–13 metų berniukų raumenų mažų dažnių nuovargis atliekant izometrinius ir ekscentrinius-koncentrinius fizinius pratimus / Low frequency fatigue of the muscles during the isometric and eccentric-concentric physical exercises in 12–13 years old boys

Mikšta, Audrius 22 May 2006 (has links)
The aim of the study: to determine and compare the low frequency fatigue of the legs’ muscles of 12–13 years old boys during the isometric and eccentric-concentric physical exercises. The objectives of the study: 1. To determine the exertion of low frequency fatigue during isometric exercises in boys. 2. To determine the exertion of low frequency fatigue during eccentric-concentric exercises in boys. 3. To compare the exertion of low frequency fatigue among isometric and eccentric-concentric exercises in boys. Subjects. Healthy boys (n = 6) aged 12–13 (12,4 ± 0,6) who do not participate in sports regularly but attend the classes of physical education twice a week. The rest period between the studies was three weeks. The tension was set up at 50 % MVS level. After that the values of the contractions and relaxations of the muscles were registered as follows: 1. The strength of muscle contraction caused by a single electric stimulus (Pt); 2. The strength of muscle contraction (P) caused by the following regiments of electrostimulation: 7 Hz (P7), 10 Hz (P10), 15 Hz (P15), 20 Hz (P20), and 100 Hz (P100) (the duration of the stimulation – 1 s, and the rest intervals between stimulations – 5 s); 3. Maximal voluntary strength (MVS) of muscle contractions (three trials every 3 minutes); 4. The workout (10 minutes of slow pedaling on the ergometer: the heart rate contractions from 110 to 130 times per minute); 5. Isometric workload: 18 times, each lasts 15 s, 40 % MVS contraction... [to full text]

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