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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

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]

Identiferoai:union.ndltd.org:LABT_ETD/oai:elaba.lt:LT-eLABa-0001:E.02~2006~D_20060522_125049-48828
Date22 May 2006
CreatorsMikšta, Audrius
ContributorsMockus, Pranas, Zuozienė, Ilona Judita, Sreckis, Vytautas, Čižauskas, Antanas, Skarbalius, Antanas, Milašius, Kazimieras, Gulbinas, Remigijus, Kšanauskienė, Liudmila, Lithuanian Academy of Physical Education
PublisherLithuanian Academic Libraries Network (LABT), Lithuanian Academy of Physical Education
Source SetsLithuanian ETD submission system
LanguageLithuanian
Detected LanguageEnglish
TypeMaster thesis
Formatapplication/pdf
Sourcehttp://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060522_125049-48828
RightsUnrestricted

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