Title Hipertermijos ir dehidratacijos poveikis suaugusių vyrų griaučių raumenų nuovargiui atliekant maksimalaus intensyvumo izometrinius pratimus /
Translation of Title Impact of hypotermia and dehydration on the skeletal muscle fatique of men performing isometric exercises of maximum intensity.
Another Title Impact of hyperthermia and dehydration on the skeletal muscle fatigue of men performing isometric exercises of maximum intensity.
Authors Vadopalas, Kazys ; Skurvydas, Albertas ; Brazaitis, Marius ; Zachovajevas, Pavelas ; Mickevičienė, Dalia ; Dubosas, Mindaugas
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Is Part of Ugdymas. Kūno kultūra. Sportas = Education. Physical training. Sport / Lietuvos kūno kultūros akademija.. Kaunas : Lietuvos kūno kultūros akademija. 2007, nr. 4(67), p. 87-93.. ISSN 1392-5644
Keywords [eng] Hyperthermia ; Isometric exercises ; Dehydration ; Rehydration ; Central fatigue
Abstract [eng] The aim of the study was to establish the impact of hyperthermia and dehydration and to evaluate the impact of rehydration on the functions of skeletal muscles performing 2 min maximum intensity isometric load under the conditions of hyperthermia. The research participants were male adults not actively engaged in sports (n = 10), aged 22.4 ± 3.4 years, with body mass of 75.1 ± 8.0 kg, and height — 177.6 ± 7.2 cm. Three studies were carried out — one control study and the other two — experimental. During the fi rst experiment the bodies of the research participants experienced hyperthermia and dehydration (research participants kept their legs up to the pelvis in the bath with hot water (44 ± 1oC) for 45 minutes). During the other experiment, using the same methods of increasing hyperthermia, the organisms experienced peroral rehydration with the1000 ml solution of 37oC NaCl 0.9%. The load of maximum voluntary strength (MVS) lasted for 120 seconds, every 15 seconds the muscle was stimulated by electrical impulses — the duration of the stimulation was 250 ms, the frequency was 100 Hz, and the voltage was 85—105 V. We registered the moment of MVS (N*m) and the degree of voluntary activation of muscles VA% = (MVS + electrical impulse) / MVS × 100. When the load was applied the research participants were motivated verbally, and they were provided with the visual feedback of changes in strength signals. After hyperthermia and dehydration was applied, the rectal body temperature averagely increased from 37.33 ± 0.36 to 39.13 ± 0.25oC (p < 0.00), applying rehydration under the conditions of hyperthermia it was from 37.28 ± 0.36 to 39.22 ± 0.4oC (p < 0.001). During the hyperthermia experiment the research participants lost 0.93 ± 0.32 kg on average, and that was 1.17 ± 0.4% of their body mass (Io dehydration).[...].
Published Kaunas : Lietuvos kūno kultūros akademija
Type Journal article
Language Lithuanian
Publication date 2007