Potentiation of Knee Extensor Contraction by Antagonist Conditioning Contraction at Several Intensities
نویسندگان
چکیده
منابع مشابه
Postactivation potentiation, fiber type, and twitch contraction time in human knee extensor muscles.
In small mammals, muscles with shorter twitch contraction times and a predominance of fast-twitch, type II fibers exhibit greater posttetanic twitch force potentiation than muscles with longer twitch contraction times and a predominance of slow-twitch, type I fibers. In humans, the correlation between potentiation and fiber-type distribution has not been found consistently. In the present study...
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A novel approach has been developed for the quantification of total mechanical power output produced by an isolated, well-defined muscle group during dynamic exercise in humans at different contraction frequencies. The calculation of total power output comprises the external power delivered to the ergometer (i.e., the external power output setting of the ergometer) and the "internal" power gene...
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F Bhadrakom, 1 and Helmer have employed spirally cut strips of rabbit aorta in a bioassay method for estimation of urinary levels of catechol amines. In attempting to use this method for determination of adrenal venous plasma levels of epinephrine and norepinephrine, the possibility arose that adrenal steroids might alter the contraction of rabbit aortic smooth muscle produced by these eatechol...
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In addition to the previously studied Zn(2+), low concentrations (about 0.5 mM) of Be(2+), Ba(2+), Cd(2+), Ni(2+), Cu(2+), Pt(4+) and, outstandingly, 0.5 microM of UO(2) (2+), potentiate the twitch of frog sartorius and toe muscles by prolonging the active state of contraction. The degree of potentiation is a roughly S-shaped function of p(metal(2+)), suggesting that each metal binds to a ligan...
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Sarcomerogenesis, or the addition of sarcomeres in series within a fiber, has a profound impact on the performance of a muscle by increasing its contractile velocity and power. Sarcomerogenesis may provide a beneficial adaptation to prevent injury when a muscle consistently works at long lengths, accounting for the repeated-bout effect. The association between eccentric exercise, sarcomerogenes...
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ژورنال
عنوان ژورنال: Journal of PHYSIOLOGICAL ANTHROPOLOGY
سال: 2007
ISSN: 1880-6805,1880-6791
DOI: 10.2114/jpa2.26.443