PED 1323 Motor Control & Motor Learning

The intervention group four males and four females

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group. The intervention group (four males and four females) performed half-squats, four sets of four repetitions maximum, three times per week for 8 wk, as a supplement to their normal endurance training. The control group continued their normal endurance training during the same period. RESULTS: The intervention manifested significant improvements in 1RM (33.2%), RFD (26.0%), RE (5.0%), and time to exhaustion at MAS (21.3%). No changes were found in [formula: see text] or body weight. The control group exhibited no changes from pre to post values in any of the parameters. CONCLUSION: Maximal strength training for 8 wk improved RE and increased time to exhaustion at MAS among well-trained, long- distance runners, without change in maximal oxygen uptake or body weight. 5- Kraemer WJ, et al., Compatibility of high-intensity strength and endurance training on hormonal and skeletal muscle adaptations. J Appl Physiol. 1995 Mar;78(3):976-89. WHY is concurrent Endurance AND Strength/power exercise in the same person incompatible for maximal gain in either of the two modalities? “Satellite cell response to resistance exercise is blunted when immediately followed by aerobic exercise…the physiological environment evoked by aerobic exercise might attenuate the eventual addition of myonuclei important for maximum muscle fiber growth…” L Babcock, et al., Concurrent Aerobic Exercise Interferes With the Satellite Cell Response to Acute Resistance Exercise. Am J Physiol Regulatory Integrative Comp Physiol, April 4, 2012 “… Competition between signaling pathways for synthesis of myofibrillar proteins and proteins associated with oxidative metabolism; i.e., increased mitochondrial biogenesis via AMP-activated protein kinase attenuates the rate of protein synthesis” You cannot have fibers that are maximal in BOTH size and oxidative capacity, you can maximize one OR the other only. van Wessel T, de Haan A, van der Laarse WJ, Jaspers RT. 2010. The muscle fiber type- fiber size paradox: hypertrophy or oxidative metabolism? Eur J Appl Physiol. DOI: 10.1007/s00421-010-1545-0 WHO needs to be concerned about the ability for Endurance training to inhibit concurrent Strength/power exercise effects? a) Generally…
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Motor Control Section 1: The Stretch Shortening Cycle (a.k.a. plyometric movements) Unit 4: Motor Units Non-exercise stimulus (e.g., infant and elderly aging, immobilization, muscle or nerve injury, spinal cord injury, polio, space flight) is required to change the % type I & II (i.e., give you more fast or slow twitch fibers) (Roy, Baldwin, Edgerton, Ex Sport Sci Rev, 1991) How to answer on a NSCA or other standardized certification test regarding fiber types, sizes and properties? Source: Essentials of Strength Training and Conditioning - 3rd Edition
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Motor Control Section 1: Unit 5: Motor Unit Recruitment TO TURN ON THE MOTOR UNITS OF A MUSCLE POOL THE BRAIN USES ORDERLY RECRUITMENT TO INCREASE MUSCLE FORCE MORE TENSION NEEDS MORE UNITS, BUT WHICH UNITS TO USE?
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