J
Jukka T. Viitasalo
Researcher at University of Jyväskylä
Publications - 16
Citations - 1954
Jukka T. Viitasalo is an academic researcher from University of Jyväskylä. The author has contributed to research in topics: Isometric exercise & Muscle contraction. The author has an hindex of 14, co-authored 16 publications receiving 1897 citations.
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Journal ArticleDOI
Combined effect of elastic energy and myoelectrical potentiation during stretch-shortening cycle exercise
TL;DR: The observed results emphasize that both elastic energy and reflex potentiation may operate effectively during stretch-shortening cycle activity.
Journal ArticleDOI
Signal characteristics of EMG during fatigue.
Jukka T. Viitasalo,Paavo V. Komi +1 more
TL;DR: The findings suggest that in addition to natural recruitment of new motor units the fatigue is characterized by marked reduction in the conduction velocities of action potential along the used muscle fibers.
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Skeletal muscle fibres and muscle enzyme activities in monozygous and dizygous twins of both sexes.
TL;DR: It was concluded that there is a predominant genetic influence on the skeletal muscle fibre composition in man, and thus also on the potential capacity of the muscles to perform work.
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Changes in Motor Unit Activity and Metabolism in Human Skeletal Muscle during and after Repeated Eccentric and Concentric Contractions
Paavo V. Komi,Jukka T. Viitasalo +1 more
TL;DR: The results indicated that the EMG parameters (IEMG, AMUP), muscle glycogen and blood lactate changed in a similar manner during the both fatigue loads, and no significant differences were present between eccentric and concentric works in the serum creatine kinase levels for a 2 days period.
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Neuromuscular function and mechanical efficiency of human leg extensor muscles during jumping exercises.
Carmelo Bosco,A. Ito,Paavo V. Komi,Pekka Luhtanen,P. Rahkila,Heikki Rusko,Jukka T. Viitasalo +6 more
TL;DR: The results suggest that the restitution of elastic energy, which was also related to the length change and stiffness of the muscles during stretch, plays an important role in regulating the mechanical efficiency of work.