PED 1323 Motor Control & Motor Learning

103 579 583 2008 4 dantona g et al skeletal muscle

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103, 579 – 583, 2008 4) D'Antona G. et al., Skeletal muscle hypertrophy and structure and function of skeletal muscle fibres in male body builders.J Physiol. 2006 Feb 1;570(Pt 3):611-27. 5) Scott W. et al., Human skeletal muscle fiber type classifications. Phys Ther. 2001 Nov;81(11):1810-6 6) Hather, BM et al., (1991) Influence of eccentric actions on skeletal muscle adaptations to resistance training. Acta Physiologica Scandinavica. 143:177-185
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Motor Control Section 1: The Stretch Shortening Cycle (a.k.a. plyometric movements) Unit 4: Motor Units 7) Staron RS et al., (1989) Muscle hypertrophy and fast fiber type conversions in heavy resistance-trained women. European Journal of Applied Physiology and Occupational Physiology. 60(1), 71-9. 8) Adams GR, Skeletal muscle myosin heavy chain composition and resistance training. J Appl Physiol. 1993 Feb;74(2):911-5. 9) Gregory CM, Vandenborne K, Dudley GA. 2001. Metabolic enzymes and phenotypic expression among human locomotor muscles. Muscle Nerve 24:387-93 In untrained muscle: Type IIB fibers: produce the greatest POWER (Power = Force x velocity of shortening) due to dramatically highest velocity Bottinelli R. and Reggiani C. Human skeletal muscle fibres: molecular and functional diversity. Progress in Biophysics and Molecular Biology. 2000; 73(2-4):195-262. BUT… The above Force:Velocity:Power curve is for single muscle fibers or single isolated muscles. The above Force:Velocity:Power curve has been used (see later in Motor Control Unit 8 discussion) to indicate that in humans produce PEAK POWER at approximately 30% 1RM when resistance training. The above Force:Velocity:Power curve does not represent the relationship between these variables when doing movements (including resistance training) due to: length:tension relationships, biomechanical angle of tendon pull, and the concurrent integration of these changing variables across the MULTIPLE muscles involved in a movement, even a single joint movement. The Force:Velocity:Power curve for a multi joint movement can be demonstrated for the BENCH PRESS. Cronin JB, et al. Force-velocity analysis of strength-training techniques and load: implications for training strategy and research. J Strength Cond Res. 2003 Feb;17(1):148-55.
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Motor Control Section 1: The Stretch Shortening Cycle (a.k.a. plyometric movements) Unit 4: Motor Units Note: F:V curve not hyperbolic, Power:force curve rather flat (i.e., maximal power output is similar across a wide range of load and speed combinations). ARE ALL 3 TYPES OF MUSCLE FIBERS FOUND IN ALL MUSCLES? “Most mammalian muscles, including those of humans, contain fibers with diverse histochemical characteristics and in this sense are “heterogeneous”. In fact, histochemically homogeneous muscles such as the cat soleus are quite exceptional” Cat Soleus: : 0-5% Type II (table 2 pg 370) Reference: Burke, RE, (1981) Motor Units: Anatomy, physiology and functional organization. In: Handbook of Physiology, Section I: Vol II. Motor Control Part 1. The nervous system. American Physiological Society, Bethesda MD Other mammalian muscles, including cat wrist flexors, are a mixture of fiber types.
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  • Fall '11
  • John Smith
  • The Land, Motor control, Gordon Chalmers

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