#68 - Muscle fiber types revisited with Professor Wim Derave

Inside Exercise

Dr Glenn McConell chats with Professor Wim Derave from the Ghent University in Belgium. We talked about the different muscle fibres/fiber types in humans and his recent evidence that pure Type 2X muscle fibers may not really exist or maybe only in some sedentary individuals. He also made the point that muscle fiber type info is not used enough in sports contexts. He outlined some non invasive ways of estimating your muscle fibre types. Finally we discussed remarkable and important findings that antihistamines may reduce some exercise training adaptations. A very interesting, long chat. Twitter: @TeamDerave.
0:00. Introduction and how Wim got into exercise research
7:02. Different types of muscle fiber types
10:10. Humans tend to be a slow fiber type species
12:10. Humans hunt by wearing down our prey
17:50. Can ex training change muscle fiber type?
22:00. For sprinters the more fast fibers the better?
24:00. The different types of muscle fibers
26:58. He finds no type 2X muscle fibers in humans
31:00. Some sedentary people may have a few type 2X fibers
34:50. New methods to determine muscle fibre type
37:20. Coexistence of more than one fiber type within a fiber?
42:50. Slow twitch fibers are more efficient
43:44. Sedentary/tapering and type 2X fibers
46:30. More fast twitch fibers in insulin resistance
50:51. Non invasive ways to estimate muscle fibre type
57:20. Swimming vs muscle fiber type
1:00:02. 30 second cycling sprint to estimate muscle fiber type
1:05:10. Coaches and muscle fiber type
1:07:10. Applying muscle fiber type info to sport
1:09:20. Hamstring strains, overtraining, tapering and muscle fiber type
1:17:45. Slow fibers barely fatigue
1:19:30. Diet and muscle fiber type
1:30:30. Non muscle cells needed for skeletal muscle training adaptations
1:38:50. Antihistamines may reduce ex training adaptations
1:46:20. Sex differences and muscle fibre type
1:47:33. Age and muscle fibre type
1:49:35. Takeaway messages
2:00:51. Outro (9 seconds)
Inside Exercise brings to you the who's who of research in exercise metabolism, exercise physiology and exercise’s effects on health. With scientific rigor, these researchers discuss popular exercise topics while providing practical strategies for all.
The interviewer, Emeritus Professor Glenn McConell, has an international research profile following 30 years of Exercise Metabolism research experience while at The University of Melbourne, Ball State University, Monash University, the University of Copenhagen and Victoria University.
He has published over 120 peer reviewed journal articles and recently edited an Exercise Metabolism eBook written by world experts on 17 different topics (https://link.springer.com/book/10.1007/978-3-030-94305-9).
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Not medical advice