Understanding muscle fiber types and training method
Muscle Fiber Types
Muscle fibers are the individual cells that make up our muscles, and they can be classified into different types based on their physiological characteristics. The three main types of muscle fibers are slow-twitch (Type I), fast-twitch oxidative (Type IIa), and fast-twitch glycolytic (Type IIb).
Here are the explanation for each muscle fiber types,
Slow-twitch (Type I) mucle fibers
Slow-twitch (Type I) muscle fibers have a high capacity for aerobic energy production and are resistant to fatigue. They are primarily used for endurance activities such as long-distance running, cycling, or swimming. To train these fibers, one should perform exercises with lighter weights and higher reps, such as running, cycling, or rowing.
Fast-twitch oxidative (Type IIa) mucle fibers
Fast-twitch oxidative (Type IIa) muscle fibers have a higher capacity for both aerobic and anaerobic energy production than Type I fibers. They are used for activities that require both endurance and power, such as middle-distance running, swimming, and cycling. To train these fibers, one should perform exercises with moderate weights and moderate reps, such as interval training, circuit training, or plyometrics.
Fast-twitch glycolytic (Type IIb) mucle fibers
Fast-twitch glycolytic (Type IIb) muscle fibers have a high capacity for anaerobic energy production and are responsible for producing high levels of force quickly. They are used for activities that require short bursts of intense power, such as sprinting, jumping, and lifting heavy weights. To train these fibers, one should perform exercises with heavy weights and low reps, such as powerlifting, Olympic lifting, or sprint training.
Summary
It's important to note that most people have a mix of different types of muscle fibers, with some people having a higher proportion of one type over the others. Therefore, the best training method for an individual depends on their specific goals and the composition of their muscle fibers. A well-rounded training program should incorporate a variety of exercises to target all muscle fiber types and achieve optimal results.
reference
"Wayne Scott and others, Human Skeletal Muscle Fiber Type Classifications, Physical Therapy, Volume 81, Issue 11, 1 November 2001, Pages 1810–1816, https://doi.org/10.1093/ptj/81.11.1810
Clark M, Lucett S, McGill E, Montel I and Sutton B (Editors). (2018). NASM Essentials of Personal Fitness Training (6th ed). Burlington, MA: Jones & Bartlett Publishing.
Powers SK, and Howley ET. (2012). Exercise Physiology: Theory and Application to Fitness and Performance, (8th Edition). New York, NY: McGraw Hill.
Akasaki Y, Ouchi N, Izumiya Y, Bernardo B, LeBrasseur N, and Walsh K. (2013). Glycolytic fast-twitch muscle fiber restoration counters adverse age-related changes in body composition and metabolism. Aging Cell 13:80-91. doi: 10.1111/acel.12153
Narici MV, and Maffulli N. (2010). Sarcopenia: characteristics, mechanisms and functional significance. British Medical Bulletin 95:139-159. doi: 10.1093/bmb/ldq008
Stuart CA, McCurry MP, Marino A, South MA, Howell MEA, Layne AS, Ramsey MW, and Stone MH. (2013) Slow-twitch fiber proportion in skeletal muscle correlates with insulin responsiveness. Journal of Clinical Endocrinology & Metabolism 98:5, 2027-2036. DOI: http://dx.doi.org/10.1210/jc.2012-3876
Vanhatalo A, Poole DC, DiMenna FJ, Bailey SJ, and Jones AM. (2011). Muscle fiber recruitment and the slow component of O2 uptake: constant work rate vs. all-out sprint exercise. American Journal of Physiology - Regulatory, Integrative and Comparative Physiology. 300:3, 700-707. doi: 10.1152/ajpregu.00761.2010
McGill E, Montel I. (Editors). (2019). NASM’s Essentials of Sports Performance Training (2nd ed.). Burlington, MA: Jones & Bartlett Publishing.
Barh R (Editor). (2012). The IOC Manual of Sports Injuries. Chichester, West Sussex: Wiley-Blackwell/ Jophn Wiley & Sons Ltd.
Trappe S, Harber M, Creer A, Gallagher P, Slivka D, Minchev K, and Whitsett D. (2006). Single muscle fiber adaptations with marathon training. Journal of Applied Physiology, 101:3, 721-727. doi: 10.1152/japplphysiol.01595.2005
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"Muscle Fiber Types and Training" by Len Kravitz, PhD. IDEA Fitness Journal, 2007. https://www.ideafit.com/personal-training/muscle-fiber-types-and-training/
Colliander, E.B., Dudley, G.A. & Tesch, P.A. Skeletal muscle fiber type composition and performance during repeated bouts of maximal, concentric contractions. Europ. J. Appl. Physiol. 58, 81–86 (1988). https://doi.org/10.1007/BF00636607
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