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排序方式: 共有496条查询结果,搜索用时 250 毫秒
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Maria Cristina Bisi Mattia Ceccarelli Federico Riva Rita Stagni 《Journal of electromyography and kinesiology》2012,22(6):845-851
One of the most physically demanding parts of triathlon is the transition from cycling to running. Many tri-athletes believe that increasing seat-tube angle (STA) can bring advantages in the following running part. The aim of this study was to evaluate the effects of inverting the support of the seat, for increasing STA, on the metabolic response and on the muscle activation pattern, maintaining a controlled kinematic. Moreover, a muscle-skeletal model was applied to evaluate the hypothesis that increasing STA changes force-producing capabilities of muscles crossing the hip.Ten tri-athletes cycled at two different power levels and with two different STA’s. Gas exchange data, kinematics and surface electromyography (sEMG) were acquired during the tests. sEMG was measured from eight muscles of the right side of the body. A model of muscle mechanics and energy expenditure was applied to estimate variations of force production capabilities and muscle energy consumption between the two STA configurations.Inverting the support of the seat showed no significant effects on kinematic, Oxygen consumption, muscle activations and muscle power production capabilities. Nevertheless, an interesting advantage can be the tendency to less activate gastrocnemius and biceps femoris: this could lead to minor muscle fatigue during the following running phase. 相似文献
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DiLoreto Zach A. Bontognali Tomaso R. R. Al Disi Zulfa A. Al-Kuwari Hamad Al Saad Williford Kenneth H. Strohmenger Christian J. Sadooni Fadhil Palermo Christine Rivers John M. McKenzie Judith A. Tuite Michael Dittrich Maria 《Extremophiles : life under extreme conditions》2019,23(2):201-218
Extremophiles - The Khor Al-Adaid sabkha in Qatar is among the rare extreme environments on Earth where it is possible to study the formation of dolomite—a carbonate mineral whose origin... 相似文献
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Lorenzo Zane Tomaso Patarnello Arne Ludwig Francesco Fontana Leonardo Congiu 《Molecular ecology resources》2002,2(4):586-588
We isolated and characterized seven polymorphic microsatellite loci from a partial genomic library of the Adriatic sturgeon (Acipenser naccarii) enriched for GATA repeats. Variability was tested in 20 specimens of this endangered species. Our data support the tetraploid condition for A. naccarii and will be useful for the investigation of the remnant genetic variability of this species as well as for genetic tagging studies. 相似文献